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 0x092e986c0fb0546d8a7cc7ea98b1c1adc557aa37acc1b15cb79f9c854954367c. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac976d36-b50c-4f82-a77f-b6450e73edb5.json and https://artists.proofprofile.net/proofs/artist/ac976d36-b50c-4f82-a77f-b6450e73edb5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trio in E-Flat Major for Viola d’amore, Bass Chalumeau & Continuo: I. Largo
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 0xe46716a3919adc3a2264a5d20b42b7971c4d86babcc5dca4edb90d77dbab4137. 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/CALC41000085.
Trio in E-Flat Major for Viola d’amore, Bass Chalumeau & Continuo: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb00ceff81b08fb111117019da43fa58c6fb5db49c9e0b199971eb2124542e2. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CALC41000088.
Classical Expressions: Best of the Baroque Period
Lalande: Les fontaines de Versailles, S. 133 & Concert d'Esculape, S. 134
Les fontaines de Versailles, S. 133: Ouverture
Boston Early Music Festival Chamber Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49436446122ff6a81cc8c50d28e362ebcd2b7bb3bf19aa6d517aff0a0506663e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB201909701.
Les fontaines de Versailles, S. 133, Scene 3: Chaconne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b0889cb0fff2ad41e9520a704f5d46908607844a0cc439a1f6de230320c916. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB201909708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5797c29a0467c192e6546c18e093b64fdcbcc2900b07cb3474cec49e0844010b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB200836701.
Psyche: Act I Scene 2: Ahi ch'indarno si torda (Grieving Woman, First Grieving Man, Second Grieving Man)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36792c58d3a1ffe6a912e3ef2d5055be531d8552d4ec8e4d9b7dddb0ffaf73a0. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEB200836720.
Charpentier: Actéon, Orphée descendant aux enfers & La pierre philosophale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e8df66c7d0f747c0ea1aa9e13693b43c31b5df6e6d1ed309708be9696340da. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB200961301.
Actéon, H. 481: Vos vceux sont exaucés, et par le doux murmure
Boston Early Music Festival Vocal Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad972c46c7f7e7582fd0417329909ec0c19b7dca4662d3f9db5dd5163f0ba1f8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEB200961304.
Actéon, H. 481: Ah! Qu'on évite de langueurs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf792e999addeb68374f38ff91a6542f5499f8d380266626f9c8c1d31ae764c8d. 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/DEB200961307.
Actéon, H. 481: Amis, les ombres raccourcies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c23fd3341bbf45c4509a3706155eef3a8d07a3498664eebb2e1c3f0d0b1d1b7. 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/DEB200961308.
Actéon, H. 481: Mon cœur autrefois intrépide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2d72061186c16a20aa3f48b64f5097651b83f87e0d70a64f06188a09d88910. 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/DEB200961311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33df44b659d64f24769d139065d2717ae6dfae05bd9658a3d17354f93de89d73. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEB200961312.
Actéon, H. 481: Jamais troupe de chasseurs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28976c6221725c44fcb30da198daa6b01f21f6b0b3f877ca6ad1bc88f5a6dad6. 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/DEB200961313.
Roy: Trois poèmes d'Éloi de Grandmont: I. L'âge des rêves