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 0x6f9172368c5eb1fd97e18dc435ded11cbb31a18f8dd824d76db74d358ba2aa1e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2e81174-3df8-4a21-aa89-eb8c6f083dcd.json and https://artists.proofprofile.net/proofs/artist/c2e81174-3df8-4a21-aa89-eb8c6f083dcd.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 0x3a94c6ccfd00713eb54856078aeee303d8be7af078a61c271f7bb8fff74e35b3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTVM2262725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb212c8a58b36401b9c4c16f9522406c51b4958e4f1fe073f18bfc1f57c703a38. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/PT4CA2330142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf592967f30d650e3b16a9351eccfeebfd2c6ff26ddf542923b9bb42ff39d21d8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/PT4CA2330154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eee9406c02c678dd552d429d08b2c1f8029d2f685065725b380bf7a017c510. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PT4CA2330164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf592967f30d650e3b16a9351eccfeebfd2c6ff26ddf542923b9bb42ff39d21d8. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/PT4CA2330154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3604566ac455b78748b5d26f20c05cf7739f98817d9edec376484e58e3cb66. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:35Z), 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/PT4CA2330194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e01132f17bd26f98cbb86aeb3b2e927fd1ad5e8b144616de691ffc86ccff4e1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/PT4CA2330228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e01132f17bd26f98cbb86aeb3b2e927fd1ad5e8b144616de691ffc86ccff4e1. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:54:34Z), 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/PT4CA2330228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6acecec9c55b4ade59c3ff7fe7b701772e5b59811d1b6214167a870988a7b04. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PT4CA2330271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080ed50513e2830e37004d9efb24016f813ff15b31389569b968834485178020. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PT4CA2330407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadee53870e24f50c9d78c2287639d7316a9dd486caf6f2e71268fe3aa13dd715. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/TCAIG2470082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca784ede4f43b433402b6d533df40eae7c6dfcb266b5984d94ccfc69daf3123. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/PT4CA2430414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2c26f04d808672a4e323edfa71b42420d1f49012c24697edb6c559c5607e51. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/PT4CA2430445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca12ba04ae80873ff3c1f86df0c0ec0768309db5d536f927029d64ad00334a31. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:02:47Z), 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/PT4CA2530031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cf2053a5a8cc20366d5955126d9d61a66dba188d687dba833f3e4bf360fd33. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJZ2544796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0185b7c5dd05f404f6db6436d57419f9f36a022dadd6258d56bb44c515f08ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA052334407.