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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a273d310f0e5a0f36fbf20bd44a6af88faf448303fdfa42ba5a8fe8f6608a3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f512fdd0-a163-47f0-97f7-1cbe43228e5b.json and https://artists.proofprofile.net/proofs/artist/f512fdd0-a163-47f0-97f7-1cbe43228e5b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191b23f0258cd59374801b81dc42a1747ad46d2ce6ce9cc9069d2c179a21ff66. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3Q92197111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d26b4a70e892bab63e1149de79389a559da816a5daa4cc9080bbaf13d179ed6. 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/COC012033679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b3f0c9439e8323268c91526079a4eb245381793c752e6468cfd2df21eedda2. 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/COC012033680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f4d0a2188f56bc5ded96b436a809ce58221b9e692b702f5326148c52292f18. 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/COC012033682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ea38d1d01f5d3d6a5652e65bdd9a81d411b58589853a336bc343595e2dbf90. 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/COC012033677.
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 0xd44daae087b6beff8d8712852d86742b596bba90d611c52a3a4fdaade784a10a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/COC012033678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3533ca80c0f55d2e7323f6e7b4ead05c043f0bc31cf1f8e3594892d39edeb418. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/COC012033681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4cfc0b112eb752781bacc8598242ca318daec5b8e1ee03b3b5e2d1ef4640e6. 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/COC012033683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170c7ba1235c15e57725fe3b0d35f1f38e8f71a11f6c0909b1e9f36829dcc675. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/COC012033684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cc72f98f4dfaf914757b9a3154ba1fc36348f68eec23c49c1f720fe0edb42b. 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/TCABN1367304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c22cefb58e6fab39fe270e2eaedc97a2de43872ba28526c42a930de205141ed. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCABN1367309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe511d529118f4b1a3ff95f601a0adf8ccd16c6863457354aa6570ab40d780195. 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/TCABN1367311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60de2f052b175fbb5c860a3b490b15f578dbed8075986d2f6811ffcdbb65d509. 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/TCABN1367318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe201dfe9b490a4896fd9edee27c9738aab1cdbf7dc1157153fd00648885bd6f0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCABI1230758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dd60c125fb1bdda0c6abdf8a59917aae3ee19584a8d682a61efb91908fe635. 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/TCABI1230759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1bb412025d8d06d691726edd6132c1c7bb3ba45f3835a4257dcc0c9230f3f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:23:29Z), 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/TCABI1230760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0b5b5af0ea97b5df4b397979ac98fb37b47c6162878fb77a8b8e0142455fc1. 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/TCABI1230707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5527919650ff83cf6918b6ce49c7faae0ade20fb82155c012062d991653b2b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCABI1230757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30e78e7a72041e9182a6b2cef6333a808797d2a96afcde344d0f46a8b5688f5. 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/TCABI1230762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea8c76a4bf0cf8332554c44c5d0d82635812bd2e9dc15727d4c040a58d79db1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCABI1230763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c4e122a67ac5bf9d8b198096508b75a824d9aa0ea148549a85a5c0152ac878. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/TCABI1230764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12767d9592e347f7c8ec06c7bde939aec7e02dc61718ec2cf4d6efae79c672bf. 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/TCABI1230766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0850f1a3130322439e7db7ac29a24ace3e8e254d7f45bbfe0936481279bae1c8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCABI1230769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927112b31c75965d9a7689a29f02a19ea8bbb1f27176d7a453dd62fac74bd011. 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/QZWFR2309104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e7c42785a0fa1c9478755f8ca4aa6960a5221ae62e1ce9da607abe99bbc66. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX53U2035112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdab257856b8f7f2ddc2048f0099bb1491ba42e7ba5c4c0ba7cdd51125fba33e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKXN21983619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c6b4b83ce8db20dea4d817c8901e9e95115466fac333284d8bbeef44cb172e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFME1522587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f161134408d715516a5dc7a092b0591772baea5a5d63b92edcd4df5863591f9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCABE1295406.