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 0x84b1d2170844e971b14f1cf5cc62aa54b7b1a436b29714092f7538afd7d3628d. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21a746b3-e285-4ed0-9004-3867d81757b9.json and https://artists.proofprofile.net/proofs/artist/21a746b3-e285-4ed0-9004-3867d81757b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1.1 Prelude - An Evening at Capitol Studios: Bach Recomposed
An Evening at Capitol Studios: Bach Recomposed
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 0xdaaa7c5c93992caca8f33d3de03f9b554ee6bbc10c7673596a5389d20d25541e. 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/DEN962004110.
3.6 Gigue - An Evening at Capitol Studios: Bach Recomposed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654579bf7e3b0a011fe5dd044f92fc7d3b87d911ce2e5231604ad42421f9d866. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:45Z), 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/DEN962004140.
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
1.6 Gigue - An Evening at Capitol Studios: Bach Recomposed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e65eeb1782c1f40b6d05214356d44272ba4bba18e8dd94721b73788280bfde0. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEN962004120.
3.2 Allemande - An Evening at Capitol Studios: Bach Recomposed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc3a14910997a4f5934629dded38aa161d6ef98412d81f1fbf4f40a9881bbf8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEN962004130.
5.1 Prelude - An Evening at Capitol Studios: Bach Recomposed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8250d27e29585c66b9b2b29240698fceb84b797ef6d63188a3de19245000ff30. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEN962004150.
6.6 Gigue - An Evening at Capitol Studios: Bach Recomposed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea08e87120eba68d1e9c3133fc4706ee071c5fa2e9400403e702b02c4c49987. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DEN962004160.