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 0xa1b092403f2c1b481071289bc5a293bd9cf9c62bde901d6dd7c7ce092e9d0aea. 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/fe4b3180-f292-474b-bf9f-902609f04d61.json and https://artists.proofprofile.net/proofs/artist/fe4b3180-f292-474b-bf9f-902609f04d61.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 0xe398a4f27ce743f7142fa1043101ddf462497d699b52cfb1584ac9aed485ae6a. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:24Z), 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/NLW2R1711975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3518c1d5c5b203763bd819a8aa14dd5de370d9e9b74fe99b75735b6e2b55ef. 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/NLW2R1711984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aa61aca0cc8cc925449076fe71cccabc625306c6d0b31eaedcbe9d433165cd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:31:09Z), 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/NLW2R1711966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab3d74466edfdb8d0e755f39030271113d67cb6375d5edce688232587d48faf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLW2R1712025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8649a9ccf32c5031014d08c2467a32a1c71c4e4d6ae742f8e8ef6b9a695db3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLW2R1712028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac9a62a47a81058f373e30423f6d3d4e254a139da86975dc30b8e462c948328. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLW2R1712031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8949b71ef69995ee3df7e2c4dab7b4853ed281a762a639bb2b994c6753ee5e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLW2R1711998.