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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41666583f9d29de9f650e41d40ddeb5197d0a9413c5d8d03d38895f5cef43004. 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/ebe9fd52-44a3-4a70-a72d-ffdd3a934e25.json and https://artists.proofprofile.net/proofs/artist/ebe9fd52-44a3-4a70-a72d-ffdd3a934e25.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102aac878fd918fc84862b4e157a5d567dec17a7b78e0538c3206bc03a224c6e. 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/QZHN42429430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c441b461ba11ca6087ccf9f5f3ed08c17947ecbe6eff00730dc4ebf98faeee4. 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/QZHN42440659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0952144c73289ec0e4e1bb66b7fc52c742a32a9e77feb835083a537498953b3b. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZHN42440666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5cd8392ad815519b22eec66eefb8f68039af5b7328f8fa3bce34a7209b010a. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZHN42440667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa153c8884712c19324f117e54e06f173bf8d4522f7744b88fbb23f7b844e23f7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN42440668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ae18265f88183d6684ba67a375434bcfe6450f5a3957827644c3c50cee408f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHN52428647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba22186ce718fcecb164c4d09795ea2b052c233228bdf7e27ef4b4021ee6542. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZHN52428650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c4eb7e9c23719f562ead6156e94f844e182bd93a95b3e9b5e933c802a6421c. 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/QZHN52428651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652e2249549fede80935035309c40044182a89a761d4a2aa851bb118de382ce9. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZHN52428653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef40130870f205fc0b990c1ba4077464e23566b635ff548e05259948bc31304. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHN52428654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f2057cb70d13daa75b481817af4038957bcb6086b5d9015a5c7913281164fd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZHN52428657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11f5811f70e50411b36f759bcfeaa505f9f09a229d9d50de79ef2540abf8d80. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZHN42487927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133241f993d7c1dd82877a5fac120d28f3e395876ebc060147035c76601abdf0. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZHN42487929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4b4661ab1e22ae86a46a3dcaa60ec410a272c2f75acf9c4e79731eb4d9c05b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZHN42487933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0195d3ffd6eccff241a691d8d1ba572ee85dd70e8e749f704aac3859db3f1d53. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZHN52455639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14cabbb7e34db95d2b9db87b195c54fefac2f829c58f58df883bac6ac07a7e0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZHN52455641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3ff5c45f9fb00fd11d7ef0a6ee5d22d2c53815a3d5f6e1d54745610dec7583. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZAPG1764973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de4e4f12a8912e05af9712ddcc3ae5c4f3915ebd94f83228a4d6e097f7b9c1d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZAPG1764976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464f2cdbe2f9024b061e5b72b5757ba2b4dd99a46d2351382c8f65720b576a41. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZAPG1764977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db906f0549dc973bd339ed9d9fe16f548bdaa2ddda553cbc64cc7bf3fcb77c7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZAPG1764978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7917cdd7371cc6e379d201d51965b74efdf85e4ca365b6683fbca9164ae4e284. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZAPG1764981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a04868e123d9572a86fb208923366d386ae82933c9be587650f38750a72c17c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZAPG1764983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fcbeea4c2e8c5b57beb816dcf3a53fc8d82bd435f9e7c9ad4785004f7fb672. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZAPG1764984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e84237fe92967fc94adc4770f82533a401e65246cc6baa51951f2350a5ef01. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6N1910743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159c4e34bedda14ca50d106ed82d04038146500dc33d9e62e5299901ece28653. 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/QZK6N1910745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d54faa9d86bd42b01fc69339fbb074e433ac2d66992dba8d66357563a6eb74. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZK6N1910746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc8ed9ee8f6d40490a04edc40bf786871cc2cf9b84c833b1103b7892521de87. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6N1910748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656c6e216cbb8673125b79916b01292aa4e196141ab66b88787dd3ea62b4bbd7. 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/QZK6N1910749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f34dbe8ef76dad577d4e087edcdd07fb7120a83052bbae8f7670d6a19b656c1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZTAU2432096.