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 0xa43f301ebcc7b7c8fd88a0198eed24876f066f22191a065a4fdf33505453fe19. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e1cd147-5458-4ff8-a184-900fd2d370bc.json and https://artists.proofprofile.net/proofs/artist/6e1cd147-5458-4ff8-a184-900fd2d370bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Elk Creek in the Fall (feat. Gus Sebring, Jeff Haynes, Tony Levin, Tom Eaton & Eugene Friesen)
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 0x1675810cd31a44eb007aabd41fc8dd4feef3d601ed04994f74bd2b9d271e15f4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USVRF1400002.
The Hills That Lead Me Home (feat. Jill Haley, Gus Sebring & Tony Levin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c882a2f8758f0e4f584ae2ea431962e491a79932413853a752a21a4d9cbef8f. 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/USVRF1400003.
Festival of Leaves (feat. Tony Levin, Gus Sebring, Jill Haley & Jeff Haynes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7627d1663b044ad10edcc6417b9ba26d5d9bbdfe71cea25666aad5026a07a857. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USVRF1400005.
Patterns of Sun and Shade (feat. Gus Sebring, Tom Eaton & Jill Haley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716805b9a4f7d808129eb6e63e5c18c4d891a7d162d3f07897857774584ed58d. 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/USVRF1400010.