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 0x6064b6d67bbc264d06ece01deff8d055bcf6d25b0ba90a5603e9c73f0795089f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/069ec2d3-2a57-4322-8b18-ec357accab99.json and https://artists.proofprofile.net/proofs/artist/069ec2d3-2a57-4322-8b18-ec357accab99.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x60e6bfe71b2061531db8b111407d09e3e8830d7f92303ed06019b3c36a42d463. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITG312100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8bdffd02a06fb2dd7fc71e125f648567d24ffdfeb22e07812cefba1640d07d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITG312100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2323ea4a894f8a938a274c2a1118c997f6219e85ed0796148559d7fa1b858205. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM21020969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6144c60e50c696ba56a7dc4807f5b1c59a2bf37afdd315433d9b614ff873e22. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USHM81061512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580841bf69aa0a2adb70c4339bdd7d58b274b4886dd89bb50e396b8ddc931837. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81061498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc630106cd4c1c360e1d5c31f9cb5d0110a7f97f14d0fec38dbf0a68dd45e2beb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USHM81061506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92182b2541d87ca7a3b001b1fb991716761567cfff9cf065b7e6a344008226c5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USHM81061491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425192a0609112830fd0bfd4d6f73f2f3a68ee4e74702078b4221d41e6a56e16. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM81061493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7e0f29488832e1cd4aaf72f0d2382439e1aa522eb38f43cdba47a9a3388dff. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USHM81061494.
Voce del mio canto (Messa cantata nel tempo della Misericordia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831cc307fef46a0b5f40acd628b072f090c639e766e0e51d0fb483e925446579. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITH271600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1aebf1e52b77040a60af8b62ef19c7a3ef8bfc2c1684124b50b4f94f019a66. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITH271600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab2cbf9c9cd0ec6cd1c8b09073b3f12ef62f82bd436479241105e5ea84030a8. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/ITH271600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925f6046eac5e426b6001f11513cea96225f7672f68ae59635ce7eb0544d5755. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/ITG311900004.
Messa della Gioia (Gen Rosso e la Diocesi di Bergamo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89d316bfecefa600d222d0eb5b8db45e4f8e7e5ac6e156d948d4beaa7d82246. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ITG312300005.
The Best Spirituals, vol. 1 (Live Versions 2020 - 2025)