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 0x57d96052615738136163cd0561b00766de7580b2cf16e72a5b8b06b24614aba7. 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/a9d21e97-a4c6-44d0-9e8d-abaeab0b0c1a.json and https://artists.proofprofile.net/proofs/artist/a9d21e97-a4c6-44d0-9e8d-abaeab0b0c1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Medley: Erin Shore / Toss The Feathers (Arr. Simon Niblock)
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 0x00e19171068ae457b83acd560c1efab563a65953af79cc27f0a075472ac3df62. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/AUAB01650109.
Medley: Joy of Life / Trout In The Bath (Arr. Simon Niblock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24ed168cefc250c2b520ca63d52de27bb51df523ebc8cba56896a625a2f7b7f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/AUAB01650110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7180ecd6c95ab632900db6197877f052272fe150a754090abdaddcb1e56545b6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/AUAB01650116.
Medley: MacDonald’s Reel / Lord Alexander’s Reel (Arr. Simon Niblock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8e12f071c1e891a355226daaa1d52cf6b49ac636ebb88e9969030599d2459e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/AUAB01650117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a6cde4237eb0e6c6a28a2e771a09f3e9f60d91a4a35c66826ceb346f94af04. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/AUAB01650119.
Mull of Kintyre (Arr. Cliff Bradley, Stephen Lalor and Virginia Read)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8b1eb5d65258dfbdedff20de2679acb836ce9eef68ca69e8d1dc8d99b58eaa. 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/AUAB01650122.
Medley: Blue Pacific Hornpipe / Springtime Reel (Arr. Simon Niblock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8175fd7eaaf79ac06c38b525b64dca6f0a38528eabc690d071c3a15ffb1fb64. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/AUAB01650124.