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 0x652ceb19b3eb2ffb80febd2729034e532e1e8854f5c71a3b038a339f9433056b. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7aacb9cd-cc61-4ea1-b817-d69f3d1169ac.json and https://artists.proofprofile.net/proofs/artist/7aacb9cd-cc61-4ea1-b817-d69f3d1169ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Love & Honour - A Celebration of Britain's Sovereign and Music
Choral Music by Skempton, Weir, Harvey, Tippett
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 0x8355f833f581d29d20136641cdbb432e299db3dc2fca97e8468b52a3bba6a102. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6639976001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dad02c856aa4162114b24047da9f513e0adb32a2fd69f3f91046461ae29fef5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6639976003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4735a2e1ed008b6281b6d64a0bcc1272a9567cb41d3332a5e91be9bb0361b33b. 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/CH6639976004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d9463a5db37200b25b61b5772b1eae6abab3ce5c6edab23b0c97eb8a428f5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH6639976011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77255375bd1a53faf1776b0a45663e90ec4bea6c2b8a0bb7f5f8e04d70be091c. 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/CH6639976015.
Lord of all hopefulness, Lord of all joy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd47154c9ef3524532e21a0929600bd6082dfb9adba24b8d07bf7f2a97da66e. 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/CH6639976017.
Evening Watch - Choral Music by Finzi, Holst, Leighton, Schuman