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 0x6958b19e8bea05f4ccce19874ad5c72b8c4fa1ad0022e44ce578264a47a7a824. 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/38bb7dae-0875-49c2-92af-830bd936baeb.json and https://artists.proofprofile.net/proofs/artist/38bb7dae-0875-49c2-92af-830bd936baeb.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 0x0372b947be2a9b677b7bd51f80081e002d82cf83835645f9364757ad63a4bb9d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/IL4551004466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd11903a5e53d95f66532ea63c8a4c45c9131d3144d566bc3713d136d4cf78ad. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IL4551004180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e26583ac0a87ba97bf974c7a24527bbd2b551908ba6c8dda981081f710a77b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:58Z), 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/IL4551004199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ce64ef01eb3b9883567d6f34ecbfcf34003d56c8af0e5d1033e19cdb9e5490. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/IL4551004182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6f59ae8456327373188478063a995d60db824f7ac40b6303e7ee6378455978. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:25Z), 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/IL4551004561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4fc16b7e3a43374e349f1401c8f48493672858d576423ffc7c03270468f718. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:21:03Z), 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/IL4551004566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05714422bd632a40c29c67d79260b9e7204c099cb204e4312b37ae75a7a99b06. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IL4551005630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94417797cddd909c90ea3b795e5ab47f2add7dd44b13efe15995d2759767ce52. 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/IL4551005617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec68f9be684c1ac935dbdc2e64c6eddb29edd73b616e1ec515a47f12b2cca206. 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/IL4551005620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adba4cbbbd7d6308581da3c38a1d0e1eb6cdfa815542345130bd5593f1783da. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/IL4551005935.
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