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 0x4a33e868f056627c007b57c5e962ec0eab85b65d4cf654ca45a620d7d8ae81f8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a29973e-8523-4a90-a8a7-aab1a38e8e82.json and https://artists.proofprofile.net/proofs/artist/3a29973e-8523-4a90-a8a7-aab1a38e8e82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gounod: Roméo et Juliette, Act 1: "Non, non ! Je ne veux pas t'écouter plus longtemps" (Juliette, Gertrude)
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 0x2ac9d60cd787ce390e7f5cf5a27b15ccb0cbcae15cf95f998a074a2542930198. 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/GBAYC9500046.
Gounod: Roméo et Juliette, Act 2: "De qui parlez-vous donc ?" (Gertrude, Gregorio, Chœur, Juliette)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e2f2b866827f2da84eea7eae7677262a37272d9cb6b8e9819b9784ab43ab38. 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/GBAYC9500056.
Gounod: Roméo et Juliette, Act 4: "Que l'hymne nuptial succède aux cris d'alarmes" (Capulet, Juliette, Frère Laurent, Gertrude)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d90b132f1fdd18226cb219fb925a93cf01567edc397caae8fdc91f9fa2abed. 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/GBAYC9500078.
Gounod: Roméo et Juliette, Act 1: "Voyons nourrice, on m'attend, parle vite !" (Juliette, Gertrude)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceec42c052e56beed8054e336f8242c30f19734500063a42432e7069e434095a. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/GBAYC9500045.
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
Gounod: Roméo et Juliette, Act 4: "Quoi ! Ma fille, la nuit à peine est achevée" (Gertrude, Juliette, Capulet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ccaa13c36c306900389cc9b22edb0dd8f813c7dea8f8b4ca38912206f4615c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBAYC9500077.