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 0x1b668bf783e04dba5626213c0e20396d44292e32c52614b9cc17e77f79bb678c. 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/42fb22cc-4d90-4417-ba9c-8e27e10c7dc4.json and https://artists.proofprofile.net/proofs/artist/42fb22cc-4d90-4417-ba9c-8e27e10c7dc4.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 0x49891bb74890a4a6671b74225d19da4b13218439793ce2913062d3507f14bdf9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBLFP1956526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c222d4d95ff8cad950f633b3f5117ffc61de75e61228446e55fe0789626164. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBLFP1956527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacb117d428dc04579913cda4d3a0f443ac64b1f7a31e922e7008f80a2dacb0d. 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/GBLFP1956529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9525f90e924409ec2ba3f6ff693ef83ff09cb6cbcd02f5e14e157d97d16b6a45. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBLFP1956531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad95b510870bc77df043aade85fcea2ce47e1b4de799fe33db1bf9fff534077. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLFP1956535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f61f768547fac8af53d2f8f08cd6d8fe5c4ceccdbcc622cbee89df0d03d41. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBLFP1956538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4088157dff3eb2a56f753d33d07a73b5abfc5cb8bce9c6cda5dd4bb8960eba. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/GBLFP1935125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a2918af8fc1dd537cf962878c5e055f044d2b86d24550e30dec50119aa0396. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/GBLFP1935133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaae3b44f51800cb8f7ea68c7042de4c7f21c8907ebab17d4222e1a565235251. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBLFP1935148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbc5279ae34655c2130b0cb37fad51d4b1f45e0c403bf75ff6a267587971164. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBLFP1935131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef89cab06e534033a9aa1229f095473deb863e8106b9e55c9db6d38d5c7dac40. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBLFP1935122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5faf726cceeeac631c45d7dd29a10d2d8969c1d9348488230b814b3efc7fc5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBLFP1935135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21b36f0893c56602d6be658608c769edc32bee1ee8666b4f3da3fa55b64d197. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/GBLFP1935127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e2c99bbd71815bfdec6a987f8040683fa6d36fc4122b1990260eae58f9f3b. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/UKXN21917693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c33848a9e4402bd34401ea58b48fed928e531d09b80f387feee57454850eea. 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/UKXN21917696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dc7a15c31e2d6095bf5dfb71670506eae01defc01f92028cd5f41df947a0b2. 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/UKXN21917692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafd5a4a7822032cd6c9c05e4d6da323fab93716d76516d4caadc2e5b4d2d4b7. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/UKXN21917695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8205d9b55c87570fbf07974aafbbafb90f688a5ddb94826a79d54c1acdd968b3. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/UKXN21917697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5c864f61092da26dacf525651cb4694442ad9e49721354e77088cf7407bf4c. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/GBMA22107962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f3e56b0e41c09256af9a4c8d258cb3b924c69b89b513cbe1f530124fc249d9. 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/GBLFP2354846.