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 0x4d7e853d8bdce8e6dda7c1dc31afbd0139db8139e673ff9b2609328f3781df07. Chain 2 (Bitcoin): anchored in block 953922 (2026-06-16T09:36:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bdfbd2b-95bd-4431-a090-ba9e882431ac.json and https://artists.proofprofile.net/proofs/artist/1bdfbd2b-95bd-4431-a090-ba9e882431ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Lark in the Clear Air: Melodies of Ireland
Silent O Moyle (The Song of Fionnuala) (arr. Michele Esposito)
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 0xf99362c838ab905b1a50050fb80ed3d0d2ed3ff067a0580ce24c7016d4c926eb. 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/GBLLH1900326.
The Lark in the Clean Air (arr. T C Kelly)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457d2d20344b5f053a1112f17a7dee876de6863d17e4cc97808025217a98220e. 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/GBLLH1900336.
Báidà­n Fheilimidh (Felemy's Little Boat) (arr. T C Kelly)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911606ced6a0f482b629a5cd7e612e63454d31046bc822cc722b72c05e6f0e95. 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/GBLLH1900341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe501cd9a7663e57d3b54bb9f70026ab3ea789f5fc4d206bd8c1d64236b5ea283. 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/GBLLH1900342.
The Town I Loved So Well / Steal Away (arr. J Tate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5833e2639d65f80376d49ccfe80dab50b240557dfa2789c48329bc9c18ee8afd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBLLH1900329.
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
An Càºileann (The Coulin) (arr. Michele Esposito)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe597228db88667456b6147e070fe599cc13f2daa6b48e13ccaa48a1aee542ce6. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/GBLLH1900334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8487233692692069ae5e70f5364c1facae06884c705a0b4aa8051654169befdf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1900337.