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 0x7fadefb1b4bf36bd29e5a440468272af6615a8a70804c5ea79aca321e99c4129. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f6124c0-b967-4dad-b84b-6eb554d3f800.json and https://artists.proofprofile.net/proofs/artist/4f6124c0-b967-4dad-b84b-6eb554d3f800.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Byrd: Early Works for Voices, Viols & Virginals
Sophie Yates plays Elizabethan Virginals Music
Sophie Yates plays English Virginals Music
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 0xc5757585f4c1cf9fbcf2c857e4e812e07f8c5651294411b14375e72cce42cde3. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0505311 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158871d8f14dca3fee41871dac7f55066eb7af8de0c294a4f7db82a953a09cef. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0411601 — a six-check JSON result.
Suite in A Minor, RCT 5: IV. Les Trois Mains
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa385b5459a995e7b49dca4ee070217102ffa7625ae2254ab44f573e268bc3ceb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0411604 — a six-check JSON result.
Suite in A Minor, RCT 5: VI. La Triomphante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9043399b217f0e49259793a1cbe54eb588fe5cf713e4dc3331d7ca066dfdce35. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0411606 — a six-check JSON result.
Suite in A Minor, RCT 5: VII. Gavotte with 6 Doubles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108af033ce7296a181d6dbf38d5c0c28d92b32e60a9f91efb72c61e5b8beffc3. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0411607 — a six-check JSON result.
Suite in G Major, RCT 6: VI. Les Sauvages
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8c97dea15fc7c5c82ecf6a7b2586e8d5cf707e0cb3b348eee2a2f52453f03b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0411613 — a six-check JSON result.
Pièces de clavecin avec une méthode. Suite in D Major, RCT 3: XVI. L'Entretien des Musess
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c054d15cdf7a98e9720f1427560006372cac0f108d924aa40ad00697a6d586. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0009826 — a six-check JSON result.
Tombeau - Sophie Yates plays German Harpsichord Music of the 17th Century
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f964c50c0bf4aeb2f32b1a4bc673a5b79db801dfe575ff279a2cace9040ad7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9805303 — a six-check JSON result.
Hexachordum Apollinis: VI. Aria and 8 Variations in F Minor, P. 198, T. 216, "Aria sexta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda564d6ac09a88356a7356f7aa8bb381403a053b16eea3bd3db0f0bab46cf4d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9805309 — a six-check JSON result.
Apparatus Musico-Organisticus, RISM A/I. M. 8127: XIV. Passacaglia in G Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec877fbb23be4b41c9114483c82c8b24145b166cd57137f248dbdcce5bf95c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9805322 — a six-check JSON result.
Nouvelles suites de pièces de clavecin: Gavotte and Variations
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527ef1810df662459a16fcc3027b8cf33797d11cff6a169714a6c520d3f90694. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD9607517 — a six-check JSON result.
Sophie Yates plays Purcell Harpsichord Works
Sophie Yates plays Spanish Harpsichord Music
Sophie Yates Plays French Harpsichord Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c45eea1fa165c1820e7341f27ba6cd852417e993411bdf5762b51d837046b0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAVZ1915401 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe7f1184e9eafa002df09e3208a0b65500d73129e53326f341db7c379fb6041. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAVZ1915402 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70f1aaa32befcb3816c1c4424d32a6850155e511f10f90575a059316a4548df. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAVZ1915403 — a six-check JSON result.
The Boy and the Mantle (Three Tests of Chastity)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb378c783b268a0323eb2b7f1e00b410af73b478ebc38248991b53e7964ac6fe7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAVZ1915404 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48250de59adb206b219d62be3e4c6511a0a047034a3ee489ec09a67110071b8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAVZ1915405 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9a80c9100bf6f8861bc06c00ad8de0b7debf5f67bfd20f492ddbcecd22fece. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAVZ1915406 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7d39dd7b005a3dc7c1458cf61e2ad240f2a87fd6767e4197132785eda6ddaa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAVZ1915409 — a six-check JSON result.