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 0xd99c6d0bc07d661afd90a3eb3e3c4b3a307cd16c9dd0ee846373a2e900df9771. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7f87fc5-5546-4bab-9e98-78cf69956ba8.json and https://artists.proofprofile.net/proofs/artist/a7f87fc5-5546-4bab-9e98-78cf69956ba8.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 0x697d4f11b86a6eac8160d719607034c6edcb3d9edd19fc4140f44e8ad9af5efc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAIF2485062.
Sea Roads | Bóithre Mara | Slighean-Mara
The Broomstick / Tonn Chliodhna / Man of the House / Matt Peoples' (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf2e896c0257cd1e1baa62929124854473f549caf6c6821c37eb37d5f70f872. 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/CAIM52100003.
Nighean Dubh Nighean Donn - Dark Brown Haired Girl (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6bfe7f827efc20a03d3130fdb5a26f3508784a9915c84b346f9e572ec03161. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/CAIM52300003.
Waulking Song Set: Iomairibh Eutrom - Row Lightly / Turas Dhòmhsa Chun Na Galldachd - My Trip to the Lowlands / Gur Bòidheach Nighean Donn Mo Chrìdh - Beautiful Is the Brown-Haired Girl of My
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6811cd5abbac677b0240446a0af2632ae172120dc2e39585342116bca3e46a3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAIM52300008.