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 0x5067200d70cc2b64022f7f4332f83d7bc3d0da014ae0ecd3d1c53686f16aa052. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe2790ab-fae2-441f-8bbe-a12c901d2bef.json and https://artists.proofprofile.net/proofs/artist/fe2790ab-fae2-441f-8bbe-a12c901d2bef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x181c1d5db27e0658c239361b96aa6cc5aa9285f3c94704e5fcacd103d21b0bdb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US83Z2501360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174d32492b84a61f310dea738707fa32b90a01cd2602031ca6b4e84406404f1c. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/US83Z2502733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e0f891642fdeab3aa29fba36c499aca0d4b402bc609710bafeb8439a06d2e8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US83Z2506262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c29e1e005d64b7e37472376cbe1a76755367a5bc01b3430e57cf8d865b3d44. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US83Z2518239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45c43f6a48f07fc5e80b17f504e79f888d89f176aa87d2d998ffa93e09a76d8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:49:14Z), 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/US83Z2522846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97be4160f15eeb2a11db3e406ecfdd7de4fc72f856aea4215d42e0686920fe7b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/US83Z2539504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6a4bd1b87c66d3d0e8a6a6d85f8bd409efc9a34504ed2940b71f352dec4749. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US83Z2544983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc550e76392d9b0f9184ccced45361d4994c2e957087c40888758cd90ff40bc3a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:48:01Z), 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/US83Z2547923.