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 0xe36ca61d250b0f518c640d31bd2c525b3cb89a5d6f470a97d02e84b94a0945bf. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbfbbf85-209b-4167-994c-e9a251bbd87c.json and https://artists.proofprofile.net/proofs/artist/cbfbbf85-209b-4167-994c-e9a251bbd87c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Parting Glass - Arr. for Cello and Small Ensemble by Jessica Wells
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 0x47fca461753bf1f704e0c3c2fd3187a8237ba03b72574f0aca868283fb7c0037. 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/AUAB01650107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fca461753bf1f704e0c3c2fd3187a8237ba03b72574f0aca868283fb7c0037. 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/AUAB01650107.
Medley: Erin Shore / Toss The Feathers (Arr. Simon Niblock)
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 0xca58755b85f8734ec4cf07af7993f393718fcec60f0381b73b205151cf701be5. 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/AUAB01650114.
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 0xe0476c7ec9858a5f1a7ac137db0a202211aaac52a82d80c7fd4b38c1b3e9168c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/AUAB01650118.
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.