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 0x75caad32d41facad23f24df2b1f79c9f704ffd7879417fc8d3fec331c62fc6b7. 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/ab2068c1-e195-4e2a-94d7-4633251e7220.json and https://artists.proofprofile.net/proofs/artist/ab2068c1-e195-4e2a-94d7-4633251e7220.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 0x6dda10d9219d46bccfce4dac7d831a8b021a11d3c2b3777a8ae24acebdc0ed47. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:59:19Z), 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/DEQ121752352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fddcb24b3d2af95d81be892f4e7c8b9fcc3f054dbfb84604daea3954405065f. 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/DEQ021801122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8527a537c9890073f6379b212600cfab8f9794fc787029fccb54331ea77eba86. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEQ021801123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde156c4e39ac691941eb1557b866bd3468161fd119c1db32366009bffb88aa0e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:06:34Z), 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/DEQ021804803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295c145b773040f3c36c485d46429e3f399a39301ecec829dc33c2b82ec0af70. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEQ021808045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1275ab2c86bcbfaeb18da9d2079b99e61c7b47d5c55b543ca5f70f06095828e8. 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/DEQ021808046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01da73ab56f0a98ecbcd6eab7aa64af447507ea6d5994f40fcfaeea196fb9cee. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DEQ021808047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92af520bdbbb4eb3c5da5839867046bc50431941eb1d1d79bbdb9241ac89116c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEQ021808048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2f344a504084c4b154b804b831c378d0e1cca1658c8f3e3bef3acc2e53518e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEQ021808049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddc0ad400d5e02c8b1ed70ffc0bd9ac421aac788d913fac5b65e03dcdbbaab1. 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/DEQ021808052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0d922445fbcfe44692dff9611874b655d93a7431d78096d85e93c2ad2b5e9f. 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/DEQ021808053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9832efcbc266e575ecc6571cf001e98f9f85f812e7ee85ff928f95f53f81761. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEQ021808054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e139a26383e2afc9f587a75f5bf2aba195f8a1bd3b4efd599e4f29935f644b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEQ021808055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6076ce160ef08e994aeac56738fdd6564b99e985adae5f721e6eae63b98349. 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/DEQ021808056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd35efbc3c029ccd92c3b54f89150167c7a8c7dfea9473c288f412f1c57cb29f. 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/DEQ021808057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4bb8aec970541c81fae58d45b711f6b155e6af110cc32d73273aeb59229888. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEQ021808058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14ef29c6f5ad6f7e5682334741474b54b2b4e464e1b34e27fa1165bfe7294f4. 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/DEQ021903378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2ca2a3b7496c75cf899d3468b6eaef8b88d8129703131d13cf05abc2cc5c45. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEQ021903383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee27ea2600a4690185674b8359b6b789956866ca7b55036c750bc6892db2cd. 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/DEQ021903384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e71fad4ef920f00d3698b0d03c7e52b13f1e4b7d20904538e0ed8a007e94a07. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEQ021903386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e762c4a6a97730b6421c1411eb33df703dcaa35dd58a54955ca2ece4de728e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEQ021903388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8294b252e5d30e3ff8b5a1e8068219d058e8e317d0aab99921d57c2810ef8f71. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEQ021911085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a81029b39710fe505f00eb1dd09af04bd524aea6642954483852a198b3f3355. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/DEQ021911086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00facb9e0b0aba3bb4e2f34168a4c01559935f0bd86f4ddc23316f060ffa3930. 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/DEQ021911087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9b92feca015685fa1b573abbcfd0ff5c017f48e5410f98e7ec02dd0721b304. 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/DEQ021911089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1694f567b39497f4da91190ca31f1c2817b883853d1886a1d9bfc0e115f6a4. 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/DEQ021911092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd2661db538082ca62c563963631b84011e342b489e96339e8abf5e1672dc9c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEQ021911097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98894a6961df97886a52c9a0693bbbd3172a2ecbcfee9beebd0e50b5eb45b4c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DEQ021911100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adbf18213856044b62e72c01fc033d08b95810784b372009d4dd7614fb661bc. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/FR9Z62000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fe35643c56719b8762d30ee4f5fc43b590ce83bf6fe06a662d7808eb521dcb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEQ022006609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6474e05a9f4ec1e99e2e1eec4dcb74f1c5b76f2226877dff4b188174acaee4ee. 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/FR9Z62100951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a00801c54bdcf57791585e2e8f0a2243665030f76094a87fc9d931d4a34683. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9Z62100956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa673f045ac3d1554b07f7a2feccdbb9dfdd998706485e2bde3c14cdd68eb9b22. 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/DEQ022292067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd23d118628d091851d9d9082af2801b41c940f0afbaf0032ec2418b977bd4e1. 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/DEQ022292073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8f7d4bd981740a873b8b2ea86332ac33153475ea7c7aafad9851e8da4e50b9. 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/FR9Z62300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6878098f18aa9c60ccfd706a5984324638588db2d236300e04f28263ee4a053c. 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/FR9Z62300682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8f7d4bd981740a873b8b2ea86332ac33153475ea7c7aafad9851e8da4e50b9. 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/FR9Z62300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bddf051afaa9be83433c634144704fdd041d3a3ea03605d02d4cc3440d00e2. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/FR9Z62400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93bda04fbdb78d2fd133499d38d108ebd67b45654f445d075ef479450cb8cd0. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/FR9Z62500063.