1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727bc7627d4727529c9dabb767745d8b599dafab12e687311750745cd185f9c5. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7142b44e-d18a-468d-926e-0a713c7e0fac.json and https://artists.proofprofile.net/proofs/artist/7142b44e-d18a-468d-926e-0a713c7e0fac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36fbae0bfa8e0c2ee1457f8f620ae974d47f13c7fb0b8fb9393a801a3b6e5ea. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUSZA1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d589d20596b71994100b79c6f95c3d3ddbbeb39cf6ad30b2621694fbfd0d103. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUSZA1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba69cc088778de9435c69fd2934bec16aea54605d49d8dade57a28277937c573. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUSZA1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00855376e2961f1226732dcc9c70abe393a266ada24483be20d46301e287d938. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUSZA1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c2782c09602a313909322debff98b017a5a7d72ae860641027559014051926. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUSZA1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d932171c1a496c35e620b9450307a1db072c392a965891fbbc0b7c02338201a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUSZA1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52f6fc1cc560c326350730fecbb8187867cb48068fe1f56cf61b3fdc30cfb14. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUSZA1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63bcd5c6c5adcf60c5439cefb86e0e7b0361f5fce76c76c335c80e4126a9434. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUSZA1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff4b5cd3ee9bca44fb9192c298965c1fc1f3520a8ca0870adcef08ce77796af. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489a1068a0d20120177819369d2ad3d26c0da01086c708db22ea81bde30383f2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d6ea22831f418ebfef0b1df562ae229d3c62eb3398447dac3df269ec7f7541. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c2556f5f68911542fa437985f99bbc8165759e8b0cdd752e80c7f61c8940e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631465fb4119ac395ea90286c4c1206def8f3a467d941b5136aca2d74d39d904. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442c25f78e92361040bc601730b321eeda158794497a5219474d273ca9054f8d. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4a13ff7afd5ef1bf88f71e83bd3ef4f60791f2643179cf3d8429aa6f3fc6ed. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f5e932fa8352d9464b75a1e1a09b8bc960c9c489845bfc5686d1e02a3b494e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45de547388eda1ddfce4dad71be3643dd9917c6a999b087e23ed4c8783bce41. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcb2a21d856bdfbd4890e4369f622042306a375a6cdbe1004599d2db788a7bf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ef05b01408c3be1658db004a99e5b2ee7d8dff2f959d674c71d02985551cf8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442c25f78e92361040bc601730b321eeda158794497a5219474d273ca9054f8d. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c2556f5f68911542fa437985f99bbc8165759e8b0cdd752e80c7f61c8940e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631465fb4119ac395ea90286c4c1206def8f3a467d941b5136aca2d74d39d904. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45de547388eda1ddfce4dad71be3643dd9917c6a999b087e23ed4c8783bce41. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff4b5cd3ee9bca44fb9192c298965c1fc1f3520a8ca0870adcef08ce77796af. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489a1068a0d20120177819369d2ad3d26c0da01086c708db22ea81bde30383f2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94531be10304040052600c7115873b2be4f2f2735546dd2a2494c7201b5292dc. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ddca4157c8be8aa2dcc831fa5354eec40bf00bfcf064bfc06b33ba9ca20ff0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d6ea22831f418ebfef0b1df562ae229d3c62eb3398447dac3df269ec7f7541. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA181014803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cace44a35a3deca46e79a62877d054aefefe8669456aa953368db430bf9969. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f4b9ec92f408c7e7a8550e6bf285278168a57f6402f7fbf7c09991759f456f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf698a7e06eb5fbafd2b573dd7fe010657984ca57fcf84f3c2ff3366249bf304. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf698a7e06eb5fbafd2b573dd7fe010657984ca57fcf84f3c2ff3366249bf304. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff58cb8116de1d7d207fedaccff2401a191456db99c49bfade06dfc8da1ab78. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9adad88a5c2f34958c151aa168f258c38e8e81d09418af59c4ff534b661e90. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806419f3e1150b6246d01b676de10a35204584e8d778d6111e37b75cb04b81b5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cace44a35a3deca46e79a62877d054aefefe8669456aa953368db430bf9969. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f4b9ec92f408c7e7a8550e6bf285278168a57f6402f7fbf7c09991759f456f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94531be10304040052600c7115873b2be4f2f2735546dd2a2494c7201b5292dc. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c4a57233c91a781fcbb9778c469181c0f07cc126cb60aea2ecc577ea9752cc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e60963f4c0c42aaab16dd5fddcc72e95c2cf4a7af1cd5953c57124e71f9db6a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b72aacb56125ec6a6b15d4baa56c9873d1077cb8f6e5a23405658b68455066c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e09557dc02268bf5e9e1c829974db6c34dd4d3cbb4e406ee0c7fc194ff2fb2. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde750a61936c2fabf5d2bf98c58cefa698455381d561fe63dc001739847d8272. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUACF1600017.