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 0x5dc68acdcf416e5ba3701b70264ce0846a3b41dadfac0eaedb92683d7b2df067. 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/ecb168db-94db-4f22-a874-9b544ceb57a0.json and https://artists.proofprofile.net/proofs/artist/ecb168db-94db-4f22-a874-9b544ceb57a0.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 0x6bb0a39ef424fc81ca90a3e92e1f4e1d54f45080210bafe2255621a38ec6d885. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEPI82458646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a6c55fc724747c3613ce5b0d1674ffff311e0b126e6ec4c1da1a6caa3d208b. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEPI82458647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0813dad46ed50d9629d9169693648647592d09978ac2ac4f51b6607816da171. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPI82458648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3386aab705d19c322b6c434bbda073420d12e0860432b3dd3c44c39a8823cd8e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/DEPI82458649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b5e16c4788cf35fb1799acaf111cb9646da32d086c3597abdefba866e6ebf4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82454360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00c8379f978c279b341e7ddca078b88254128bee3ec84f525c16c175a93fe82. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEPI82454358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b39c5ab870766adc3000a82468f115319c4951e5464e93b703696bc0e6a211. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEPI82454357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2408b1e0020c647579ab82e026aad39702b6e9d0091271df88ea480d01727608. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEPI82454355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4b193f8cf7a9c13180ff224902ec53982c40a02cf01e11a0fbfded1a196c74. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DEPI82454354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a070133788bee1f0b1c574bf8c1619b7db20694cbcf3a961a19dd76b28af34d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPI82454352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ad5747bca299b122353a8aa26672d2b3cd842150c1691452c34ed69643f69b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEPI82454968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917b9b28a70391f0a182c376456316fdaa96941fcbdd39154b5a55883cadf058. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82454971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf711a001e45c2957f8433140622e4e9ea7f611b8116b1f7edbcc3194b334281b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEPI82454972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10589da3946e4d2f0c5666bf73b0b8556998a78ac3ec09cbd8d1527cb4a47ca0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEPI82454974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4e705151931f407f510cd4362b9c24f1c5fdb37170e6c33aa5057b3d3847cf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEPI82454975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7092b7e5e420c69816b27cb9d4afe9be51df703f951b537a0d2d61bdd68ecdc7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEPI82454976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4964aa93e28b9a83480cce19f9482d8e2e6f06fe031c910e09606228bce26656. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEPI82454977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93cd266efdf376cf1c7b4a59a55cbc0cb0b674091353c4e431d5c22fb060403. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPI82454978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a76fdca3c75f33cde9a8f3711a3fca60bc791d531472362d490ca27ff2e51e0. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEPI82454979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295474a1016a04c466dec4c04cf5e66067af7eee48ad7f95025b25fe5a889cc4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEPI82457467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5649a3b25ce06d222a1e2f5ed2d4aa53115cb11a95d5ad8efd2f31662dbe8cc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPI82457468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79341c78c8085fdb67854b612ab3d07cfda35e229fa9552827305d9391c19c19. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEPI82457469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fa4d4d9d8ec4bebd2493816303fc6c1ce8cb093f292e8a7bc72bd65668641d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEPI82457471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f8f638ea8859c1cb5817728426ccbad32d2a552f7445b1ee6e7dae9b2085bd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEPI82457470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9879b47b4e337fb4b3749247f61a0f182389d231e8a294ba193abdbcee9d029. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEPI82457472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8deefc779da0850ce72661b08d3269a590f01517cb37249cb531592a39ba27c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEPI82457475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd147561f8900a06b3e72442faf5dd1bd5a480e99c12486c4515f5d62f87d4bbc. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEPI82457476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb291211d24e5fd84c3da6e21762555538521c81cfbb524fb0e17ee49bd68aa24. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEPI82457474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ca46f435248cfa46b2f4e42d98f1a4dc1a53b061927c31ad92b828a8cb9b19. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEPI82457473.