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 0x8b5e9a402af76319ad6a0fc56d37bd7fc5ae837db08735a19b9064f057680135. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbb394a7-a554-4bf8-b406-c20c05267b5b.json and https://artists.proofprofile.net/proofs/artist/dbb394a7-a554-4bf8-b406-c20c05267b5b.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 0x78966cf84a551dd6b3b9631a7d4c41e9031fe7cfd26520529a72d0d90bc8e44d. 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/IDA238472006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63b9b14b24e8edd46707a656c29199c2ce1985ad0965990f6c7590649085f06. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/IDA238672001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0e2a97cb9641fd08928f1fc65a8194060b98f28d345ae07ee1160fdf394c6c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA239072015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d099ae0072b2dcdf8879ea527e088fc3f169707780e2423f15cbed86ea0636a. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:42:34Z), 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/IDA239072016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23087557be8327a96a486891d5d5212309059bf9f26feecaf16170cf17e15033. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:19:37Z), 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/IDA239072017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d711188db998696190a5add11e74372f1774d34f94d1fed884f67db70af432. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/IDA239072018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf28ab71855633c4ee1d18a6e21a5962062a96aa3ac387d5a3923bb0b719cde2. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:40:01Z), 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/IDA239072019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d4c2bb2a3266841e1eeb75d9ab95200830ab469603f1071999680702491c57. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:22:38Z), 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/IDA239072022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122a8a66476adf66ffc76e5bc779ceb77e4ec66e5f63b786b4dc70a7bb8ef515. 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/IDA239072023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac896068e6b358e32ba5c604b41689e2cfb6c44068cc2aa953e0ea3ab9cd76f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IDA239072024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7deda34ff988266029f126abfbd61c1c32888ef24535f51a42de61f814b602. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:15Z), 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/IDA239072025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246b095c608f83e2d2403717528263dbaf1cb6c2d7fcd3398a750a822104aae. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IDA239772015.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dd53f33e54f8008c552138bc993e28f87a3ec942572b56f10da8a4bd26e2d6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:33Z), 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/IDA239972007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178d36f3366a4826918d9290045b47210cc3d4ca36ac76fc6fb58de691c16ead. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/IDA230372021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b96a12c7e96bba8b14f5956b91b276e4ccd8cc330c0534dbc2b8632eb73664. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/IDA230372024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48ff72a4dd98f242075dd0570df483de181160544fce64d5667c128cdf390ec. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IDA230372025.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b46dd1d4c50aeab1916d759f71e9b06cad67763658f7a14959511e6b201d430. 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/IDA230372033.