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 0x8b3a5f4abddcda9a0684d4c0ea5708bec799681279c9dc13b1a274003a755537. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64296341-1689-4b42-acf6-f2eb831f3780.json and https://artists.proofprofile.net/proofs/artist/64296341-1689-4b42-acf6-f2eb831f3780.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anthony Rolfe Johnson | Recital at La Monnaie / De Munt (Live)
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 0x32c98d7d31c3d9ca094e237e9599772da20374a6229aafdea9576ffe216547a7. 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/GBNVV1600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3303f23936966220fff3fa9aeea3ef7d54d6a34c6012fcca511faf204d17270. 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/GBNVV1600023.
Schubert: Hyperion Song Edition 31 – Schubert & Religion
Songs by Schubert's Friends & Contemporaries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccaeca56446356cf1befdf1db5ae866f0d8f12e3a61f4c50cf20e56fd87f3e7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJY0605104.
Poulenc: The Complete Songs (Hyperion French Song Edition)
Fauré: The Complete Songs 4 (Hyperion French Song Edition)
Fauré: The Complete Songs 2 (Hyperion French Song Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c65d8eec9cfefba9f855dba72c97c96df23135207277fdf9cffa2503554982. 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/GBAJY0533405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98c41ffa72d1eb3c2497d9b427eb48851c15c2d976cc1cd8ccf819569dad7a9. 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/GBAJY0533412.
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
Fauré: The Complete Songs 1 (Hyperion French Song Edition)
L'invitation au voyage: Mélodies from La belle époque (Hyperion French Song Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ff495f5afdc3a5bff10fcd8b5ed341d2c2f32b63a398f437d05ce149cec0d9. 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/GBAJY0652303.
My Own Country - An English Song Collection
Schubert: Die schöne Müllerin - Wigmore Hall Live
Litanei auf dem Fest Allerseelen, D. 343
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63836179a2615563729e9a8df39f7e5a0f141735eb01b3c6de1be1566e6f385e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USX761009259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c31efef1033b1571680cd45838229e1104cbe6303bfd84d4bbd7121ee5cf4c1. 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/USX761009261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f7afac82cba6010921a865afd6f93f5a7c5ead42b94644bd189af2f15842a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761009256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58042a172d58024f59f01a296c3a8c752f69abf59f39f96e22a6f0afb38f0193. 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/GB4ZK0900037.
Women's Lives & Loves: Songs & Duets of Love, Marriage, Motherhood & Loss
Fauré: The Complete Songs 3 (Hyperion French Song Edition)
Fallen Women And Virtuous Wives - Wigmore Hall Live
Walton: Anon in Love / Facade Settings / A Song for the Lord (English Song, Vol. 1)
Gounod: 15 Mélodies enfantines: No. 15, L'arithmétique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2432dd70d456f604ba75fac49d9979d537a03f6ce8bd607f965da1dc0d731b83. 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/GBAYD8900484.