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 0x0e7af51545b71e86a24643ec1631ec1a1130d5411db665dd26a6334864264722. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2896e866-91f5-4186-9f04-dc3447570db9.json and https://artists.proofprofile.net/proofs/artist/2896e866-91f5-4186-9f04-dc3447570db9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
While Shepherds Watched Their Flocks (arr. David Willcocks)
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 0x873fe5b72b2a34e1a69f1806ef2346fdb08f91ddeacc5a3515f91dbf87be2b3d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HKI199235504.
The Shepherds' Cradle-Song (arr. Charles Macpherson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879c5084a05a819c39d96081af34b8792015d730b8202b811b530dea236ff931. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HKI199235507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd645443294895fa9518bb0142ad7021fa98a3652b59694d3253e355c88dcec2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:06:19Z), 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/HKI199235515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9997f04fabf30890f2a180e9f7526f29dce7417fe6b48195667d3a26cbfa4b. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/HKI199235519.
God rest ye merry, gentlemen (arr. D. Willcocks): God Rest Ye Merry, Gentlemen (arr. David Willcocks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b44c3b8bb4c033af5275420bf5b5f0dd9ae58f4abad2e2f495a32f2c6be9340. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HKI199235520.