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 0x8358e1032d67b9a40118241300c5e286eb0d118dced46b2cf4cb15453ebf8478. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfe70387-241e-4cea-83a6-476b2e0bb8cc.json and https://artists.proofprofile.net/proofs/artist/bfe70387-241e-4cea-83a6-476b2e0bb8cc.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 0xe649a447b1b37b71f39b00ec6ce1e8cfba55f64a2b66bd128f49d92c19353780. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBQXY1560001.
Donizetti: Les Martyrs, Act 3: "Oui, j'irai dans leurs temples! Bientot tu m'y verras" (Polyeucte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3af4c59d679c9ad157ac2a32ebdf4613f4a29f07d21678459f5f0da111fa4e5. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBQXY1560043.
Peter Grimes, Op. 13: Act I Scene I: Oh, hang at open doors (Auntie, Boles, Balstrode, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9885afd4ffa5117c1a57c097d7da557709f6dd78b99aaa3bc81e42d91f3ddc15. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1334806.
Peter Grimes, Op. 13: Act I Scene II: Now the Great Bear and Pleiades (Peter, Nieces, Boles, Balstrode, Auntie, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e7fd6d98f904528b1b50b31e36128f91226a23360423ea2e007e16e2cd418. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLLH1334822.
Peter Grimes, Op. 13: Act III Scene I: Embroidery in childhood was (Ellen, Balstrode)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81f3eb9c2eb7b18c183433a574bd66da277bc15a1b5757c3f8c362704731a50. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1334846.
The Apostles, Op. 49: Part 1, II. By the wayside
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710fb9a1310e9a1ea6455976769cf3e9d10c12d302c9dadf8e5533c547aeb1b2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBXSY1200066.
The Apostles, Op. 49: Part 2, IV. The Betrayal, In Gethsemane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951ee8a98626349194006ee07b2b8fae716f64c4db52c4011a9b9663002cc7cc. 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/GBXSY1200076.