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 0xf266fe660c60d5632b6456125f6302dcb17f6223105044665c34a03c1c813749. 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/c4c2c273-f352-4f00-8e33-ad8c3ac90725.json and https://artists.proofprofile.net/proofs/artist/c4c2c273-f352-4f00-8e33-ad8c3ac90725.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 0xe034c456c7e4ba24da922a86aacb965fc0bd2c2af74c092195dd6dd3fb53e714. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ESA081700570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7082a5642f5f5d1a18424bd6b6b0e5c4572e435fa3bd592b2df0377e36a466fc. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/ESA081650297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64cf0ae8e9a038842f73834212cd5cd8ba04673702f7f4e1dfb9fe600023f0d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA081650298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46c7316ec44432a4f4b414d1b1df7e79bc92c993541aa6857b2c41718a9b247. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/ESA081650300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430810d7c631b7e55b11e13f61b4a5a58867347e72a1ee941f7147d85d9940eb. 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/ESA081650301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a6565f7321c99ea37845788efb8f8fe3b5a35f7ba2a1aa163f3bc4ea61ed33. 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/ESA081650303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c79f557f909552f480af0e6fcb5e1869523a8d6fb98565296ecfd2de45278ed. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ESA081650304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f633970703318a7afef89cd01c4bf0b8aa70ae22d77d2f8d410425f41ebc3e. 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/ESA081650305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dfb69b9cf3095ca10fc79a502f0208d78edd94fee60e98938cffac5cfe515b. 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/ESA081650306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffa612ac54e1a8351a1763bf1a87e47d162ba6490137a224291183eca8987f7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ESA081650307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51682eb0e37bc08a5211328a6583e267231be1a373d2e49a7a557692f89fca87. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ESA081650281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd864fe0524333c7b15719687cfd1d2aef4527b268379c644819c1fdc53d26e5. 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/ESA081650282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227d5b662e9da53f21e53ab43e62535a46a66f5a878d5e5b4ae999aa221151e0. 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/ESA081650290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbd181e3d28216d694460d3db02db10f510ba419e5eb0831150b1628badb071. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ESA081650292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c0779d7ff1428ea646e1e7254319dc8ea86cc9125bc6c7dcccfc0320cde2bd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ESA081650279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b597d1e36cec6e2ed1b27c325751775b94a2cfd02e5803471dd5211e2f303b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ESA081650288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10160f5cd44f3734643bb6a93076b97da472c17f6f45a941d5f3aaa283a9c5fb. 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/ESA081700141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9900ed9d910e68c68fbd86d15a973664a6bdcad48e5e94306c11024c2f5502e. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/ESA081700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8744248f294e9db22c1ec7b90ee829b0d558e8bfe87165e9ed473b1c89bbd1. 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/ESA081802090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb134fbb5fc7ea140f7b9a5986ec8b83e3bb64ac0c35a0148b4f50c3b5d321. 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/ESA081802244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d81af0c4eeeeee5c48d2274bb92d6e65a3a637c05b875caca744ea81d00bea. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ESA081800845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abce581328290d831d41920e175dba5f25f6ee098837850250bd94d2b84a580. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ESA081701237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cf8d82e1711dd6213e5b3713adb5f86de4384eb86c4cfe889364acce1c488c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ESA081700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d49152b319e0b6fb3f597de66fbe318861e51165520415806a924b66703a5f. 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/ESA081700142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c24611efd87474dce0c721ce53cbb488d881215ffebd447657910c087134c6. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ESA081700573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc575418b242b68fd3ddfc2c9157e25ae2ca44f743fc79d4954b8adbece7df97c. 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/ESA081801726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dc762a524b9428d94349c91dbadb0d453c615496042191295338e494b65bd9. 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/ESA081901757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a3a231d362a9bf4c3e0e707bcb3a13e9f59163df03956c7120938e5e81ee59. 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/ES21A2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd91c8330f7b6ff01637b20252117c898f9347ac41631e4a305a77c0ddbf04ee. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ES21A2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f2442264e1d08d24deab30439c640b5fdca3c292b1718adc5d849c1328d19. 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/ES21A2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa026ac5d93fd9fde16b0382dddc573aebcc8b133df9bfddcf065c393c43292f3. 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/ES21A2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124082c03daf437a5eb7560b2a445071430dbb020705b4ba341f104803a5b302. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES21A2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49f0b2407cdd3ec67deab3698b55177038bcade1b902931fdb67bcc7e8b46a5. 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/ES21A2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493844d4641fcec62fac69b6fba5eb269b1cf2fdeb8fb3bd0fe9461d01a393b2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USA2P2126489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe78fbf69712a8118af2f596bf89b8f079cef46e13cbb1a5948664eea0d133ae. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USA2P2135635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762cbff8c9f634339f62e74bfafc545765be0c5c9c7816dca22ba03af9492e65. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES71G2300247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b0139c6f996becf8b4bdcb957bc914c07bc665e456f66cdbb6614297288c3c. 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/ES71G2332257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a288ac9a6739782606ffa5195f5076659de88fe3243ff20b7a9bddfc334117. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2408873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e71a66914bd3fc5780b6303f5e021c85ef07175dae3d8d90c438d51ac0903. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES71G2417812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efad2b5e20574b4e8db2e2f126c4ad912deee9be888773859451d332d3db90e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES31E2202556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1aadb309923cd982849745926f175d7ed733faaf43f7231bd7ff7736e9e333. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES64E2312041.