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 0xe036b016f275b9318746cbcecaab3a32c726e762fae758ad96349419b80b4d55. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da3c94ce-a4c8-4e8a-be1a-fc8115e635f7.json and https://artists.proofprofile.net/proofs/artist/da3c94ce-a4c8-4e8a-be1a-fc8115e635f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
12 Chansons de Bilitis, L.90: 6. Bilitis
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 0xc3171ceed7263d7327adebdfae618896d4091355fd1ebcb6ce2e1ca5e25217ee. 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/DEF058930506.
12 Chansons de Bilitis, L.90: 7. Le Tombeau sans nom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ca9a746e1831d65c5f8bba19f424434540fe5d2498758ac91aa164091144aa. 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/DEF058930507.
12 Chansons de Bilitis, L.90: 11. Le Souvenir de Mnasidika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe9402fa4cbbf6be09d09e3bb0666b37fb5c068bd9233be874cf7ec2b1c841c. 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/DEF058930511.
12 Chansons de Bilitis, L.90: 1. Chant pastoral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c18b0234536f427e8dc2540b688a15853089b9e547c9dea8b2174b95349984. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEF058930501.
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
12 Chansons de Bilitis, L.90: 2. Les Comparaisons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11be20894a9e40d0585205831e049876b381b900ee6ea99216653e850aadf5a. 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/DEF058930502.
12 Chansons de Bilitis, L.90: 9. L'Eau pure du bassin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe427c29c441c3757f8b18593a2a7f329ff4b73a90f2b2b9207d96df55072c008. 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/DEF058930509.
12 Chansons de Bilitis, L.90: 3. Les Contes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362455de2508a188f0a311268e3c7ac57d364f611444d4693bd1d3c2a0ecf7a5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEF058930503.
12 Chansons de Bilitis, L.90: 4. Chanson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9362c26ed73e87f949063ed1d5800acb5c65720af6ba52e37ff6c13ed6d3d9d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEF058930504.
12 Chansons de Bilitis, L.90: 5. La Partie d'osselets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa527ea1d47d40c28eabdc20ae9d2ca0059533901c298d34889fa168cb52037. 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/DEF058930505.
12 Chansons de Bilitis, L.90: 8. Les Courtisanes égyptiennes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1ea60af18b06c99396e487bbafc0d6c24151c9db54b0ce619bbaece151a79a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEF058930508.
12 Chansons de Bilitis, L.90: 10. La Danseuse aux crotales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80215865736652ea42255324a074606571afe2a38b1523bc27131ebf5ec85beb. 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/DEF058930510.
12 Chansons de Bilitis, L.90: 12. La Pluie au matin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c7a6ca966edd4f018bbd1406b92466ca8d43b0dfb6cc00525aaa99eb1dc60d. 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/DEF058930512.