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 0x03c8add8c19bc4f3d5065dcf6f845507e3ca959c31b5c4b9c24c7c4e9eeda040. 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/e011d4fc-cf2a-4340-92e1-b89ecfa7ba03.json and https://artists.proofprofile.net/proofs/artist/e011d4fc-cf2a-4340-92e1-b89ecfa7ba03.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 0x47823cd60f2eb3e8ea1c8c84c7461c30db085afd210d21e72ad912fe64f9db87. 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/DEA551835270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3ed40739b93fde84dfaf811af1fd6252e269f6f9d0ffafb2e817ac59cd646d. 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/DEA551835276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910b1a9a3f28f731007a0688a1c8dfd57aa2c1a69c2125fac0a355b1edd281e. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/DEA551835284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9a97a06788310c202f27f8e944af5169e88f22fec824bcb5226e07bd06eb90. 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/DEAF42100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b378bb333f400b7fb42499c02e290664047249c6f7ffa702929c3eb0eb54276. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEAF42100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd48b7c3a17e3a74f936e82f4988da9f2796371b60c119600a7f698008059f93. 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/DEAF42100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eb4c3301fee8f61cb7092914fdf92a6daa3dbf8f5dbcc0411581fea55ca53c. 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/DEAF42100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e3d7a0bf62ed9266f3ce09e37e84bfc430f2146793df055dd0e439836b5958. 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/DEAF42100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0a42916b62fd4e447bda39bba3914ceff29075245c2315dec879d43518a270. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEAF42100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe476b83c1ece712657a2906e8c70b81d23289041aea2347fd63985ca1282ed2c. 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/DEAF42100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b360b859b8ea08ca3327daf053bb4f0868bdc1e32b3563f7e44cea59077930f. 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/DEAF42100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c2853716e8c029973e89f580136a7786e98bacc12c472bf91d046a99221a22. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEAF42100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8c31010a4a8be7ba8af98c8e0fbec6b36114d9716fef1927599832c382ea84. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEAF42100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3655417da068540ec50010bec83b3331212e538f25cef28d279d42fd2b5fd6aa. 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/DEAF42100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71793781298150f9310c2e2c8512e990c9cf030f959761db0737cf93d32d672b. 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/DEAF42200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c588d35c3b0db15123ee22337b553b9aff890fe34c7d276fbf25eb093eee08. 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/DEAF42400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0173d9ebf3119bb571fc7893a13283c817c4db26d222b2b7af49cd5cadead7fc. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEAF42400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6438cefbd92e72eed97a5c9a66f9aab6c54201d1b30c7312b9b67a466c84c4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEAF42500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca17081e0bdb1ff755694ffdeb777404553726b3a86388e5ee2e1b8bd7c82ca9. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/DEAF42500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c588d35c3b0db15123ee22337b553b9aff890fe34c7d276fbf25eb093eee08. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEAF42400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa07ada27743737ad987f55eb3e8eb84a2ebb85463cb3fa4a6fe33e001d213c3. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEAF42500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d42da1dba10f2425e0a3afb3c3593db0218eb2f539eb1d980c0c204d2b40003. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEAF42500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c757a076aa389f2a91c186080616494a456c1ef0545d20e153981e2c33e1bb. 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/DEAF42500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0173d9ebf3119bb571fc7893a13283c817c4db26d222b2b7af49cd5cadead7fc. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/DEAF42400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeee0bbea1d11fcfa83ab8da38bf26580a5ae47afbdb4a953f4119800c5e86b. 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/DEAF42500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b7bed4ec245433b01a31a944fa391be4214426a91dbcf9d6630ffd43bb210a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEAF42500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6438cefbd92e72eed97a5c9a66f9aab6c54201d1b30c7312b9b67a466c84c4. 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/DEAF42500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f32724d100e235bace88bf00b89d21764e31f7d55182af4feea9a119505c2d. 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/DEAF42500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e567126f990f99862e3229451c544fe5a571db1bf73d11adb4db550e22cce8. 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/DEAF42500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9bb20dffdceee5de24bb786d36a76a63dec445a0ab6eb898fe2d4701a8a93f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEAF42500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755d479019e5a6f0de98949887521b443cdd6ede1264ad861014b0614d7716bc. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEAF42100020.