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 0x727bc7627d4727529c9dabb767745d8b599dafab12e687311750745cd185f9c5. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d932171c1a496c35e620b9450307a1db072c392a965891fbbc0b7c02338201a. 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/HUSZA1700012.
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 0xf5d6ea22831f418ebfef0b1df562ae229d3c62eb3398447dac3df269ec7f7541. 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/HUA181014803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414c2556f5f68911542fa437985f99bbc8165759e8b0cdd752e80c7f61c8940e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 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/HUA181014805.
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 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 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/HUA181014805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff4b5cd3ee9bca44fb9192c298965c1fc1f3520a8ca0870adcef08ce77796af. 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/HUA181014801.
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 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 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 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 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.