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 0x47b4e9618f19e8af11173169d15c9406febfb95808149feba0007e46904fcadb. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45ebb49e-2db2-4815-a228-f844bdc360f6.json and https://artists.proofprofile.net/proofs/artist/45ebb49e-2db2-4815-a228-f844bdc360f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Berlioz: Les Troyens, Op. 29, H 133, Act 1: "Châtiment effroyable !" (Ascagne, Cassandre, Hécube, Énée, Hélénus, Chorèbe, Panthée, Priam, Chœur)
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 0x67cc147d88f8e09e10ee0339b6ec199094f4499d431a58e0f38e476adc17c951. 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/GBPFW1700316.
Rossini: Otello, Act I: "Ah si, per voi già sento" - "Premio maggior di questo" - "Amor, dirada il nembo" (Otello, Iago, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd5976eff904067e6a7a5fc0b24c89b38ac8f56003f642775d313b245ae64de. 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/GBAYC2002715.
Donizetti: La fille du régiment, Act I: "Ah! Mes amis, quel jour de fête!" - "Pour mon âme" (Tonio, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1ced3cce885d6454a4c63994f24c43852bd31ec8ea5daaa37ff9c5920e3b18. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC2002710.
Offenbach: Les Contes d'Hoffmann, Act I: "Va! pour Kleinzach" (Hoffmann, Nathanaël, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553eef4a5bc6010bb221e5912022401013c11ca13b207248615a01a6f78ea813. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBAYC2002713.
Donizetti: La fille du régiment, Act 1: "Ah ! Mes amis, quel jour de fête!" - "Pour mon âme" (Tonio, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1ced3cce885d6454a4c63994f24c43852bd31ec8ea5daaa37ff9c5920e3b18. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBAYC2002710.
Berlioz: Les Troyens, Op. 29, H 133, Act 1: "Ha ! Ha ! Après dix ans passés dans nos murailles" (Un soldat, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa924f0085297037b0048709599d48a38f3988294cb655e29fd76a6a133688080. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBPFW1700304.
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
Adam: Le Postillon de Lonjumeau, Act I: "Mes amis, écoutez l'histoire" (Chapelou, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38bc45ad6264822f959ca48d80ee3f72eee3de49132e564fcfd59e09a93473c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAYC2002709.
Thomas: Hamlet, Act II: "C'est en croyant revoir" - "Oh, vin! Dissipe la tristesse" (Hamlet, Marcellus, Horatio, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3e0a967c4065ce6933be7455345175c3c43d4af324adb6737d83e6df755187. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBAYC2002712.