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 0xac1a21af6706a1eee7b59de3f5269fc4412bf99f29f644aeaeffe73538cec48d. 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/7532cebe-fcee-4bd6-bf2d-65716f206c64.json and https://artists.proofprofile.net/proofs/artist/7532cebe-fcee-4bd6-bf2d-65716f206c64.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 0x19743d2e53aa876d1c56fbfb1fb45c83a7ded2f783c8fc4ca87fdc6547b96499. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/USHM21894393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7576402cb75399839e67cad90a1da9b81345665846f0b68bcf396aa17029d1b3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USHM21894394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084c65cbc352cd04b6934d563b234b80e2c7c9eebaad9ff7dc2c1ca9d8b8146b. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZES92133153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344dbba131de9a46b497dd0ace69f9cfd47d1a6eecb66c31627fd8a1ff4b0f78. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZHN52109466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7416c0302c72b701d515568a898a4eee9445d6b781b947943af92366533d7c. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZHN52109467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7152f541883f9f6f512a9c2089d769eeac97e0e9c8ce3b374abfd32cea3546e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTB82285278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb1df2bdafef90c104191f79e338ed31872c732a185dd917ca5aa14cf10c226. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFYZ2316099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d11848bbd4fe880a03ec5b884e2a9ebb92250174f79f48262af5083214cf7b. 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/QZMEM2370547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4beed077ca54d5d31e8d4fd2adaee63b9eea724dccfe4f7a73c0507f356266d0. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZNWT2329071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891c2949a93681fba0c32a80f6d30a22f8428221140d40583393f9060ceb2e56. 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/CA62E2301209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56902618f23544d98f6b080b8b63def31039d21f55e5da77fe2b8e131fcd9c5e. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/CA62E2301257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4135a0653336437ac177d6f854ecc07c4a0bb76ff6a0f18df6f3e685f4f0d4c8. 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/QZDA42328055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ab6b6b5d54ed0044641b224f256a33e4145a283a6bd099d42cedc47d332c36. 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/QZMEM2350610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b2305ca4ff4e596e21011d1eabfb364fbdb0dc4c1bafabcf15b9caf2aaa58b. 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/CA62E2301292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7126d8674ee86fdc2e0a861da35ad69ae20c34a1fe952187ec943523afd4c97. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/CA62E2401224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac14d01ce9150bdf7d2d17053192656c3a6846debdb9089bfd5feb6383337391. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CA62E2401286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa624b9b97d1b5a7483ea23fb80d9ece2b7abd339a18d348ac1d0e8002f11c81b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CA62E2401293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee35b92ac0ea16b7981da8b6cfbd057e94dbf7ff10975a5c32726aad6bf45a7. 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/CA62E2401411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bf65b24454d0ad26194a34a1240bcecf04ac04bb74be2f2644578b611974eb. 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/CA62E2401451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0100a507a47d69988685fabfc7921d41d61903b90c47b91a3ebf85507c020dc. 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/CA62E2401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08feabde69a56c1c265bf34e50576d735737e23ea036998a41d9ade8b7093f36. 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/CA62E2401526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786ccd3ee6b56fbf345656ba3ae30bc1ebf187f447d48f9d340065289ef4c39a. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/CA62E2401556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf7229d281c34dc8314b53e456c97175f1fdac30f8515073bb6200e89e73a9e. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/CA62E2501028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d11848bbd4fe880a03ec5b884e2a9ebb92250174f79f48262af5083214cf7b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMEM2370547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4beed077ca54d5d31e8d4fd2adaee63b9eea724dccfe4f7a73c0507f356266d0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZNWT2329071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cd909714f734347ea13cf98fc519aaeb4c07db182a3ef3bc4137d3784d4f47. 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/CA62E2501055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e3df9d3bf3b5213dc0ece5d4d2dcc57e985f8393e55dda71c0e4b5cb376a44. 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/CA62E2301242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66900eab7b234980dbdc0f593e4a9e411ea79fd30fcaafdf80dbbd08d710c87. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CA62E2501143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fb40d2b79cd5de4418eda989fe18f3933da9a58491b248ab0b164cf52efcf5. 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/CA62E2501145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a864a7927e0067ee72ef13898d03dac57c0d2f59a05f29b3061677d7eabe34. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/CA62E2501148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3538c7caaa48e5148cf9bf873e37036427d19dab1e4750277628ad03e550a3b. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CA62E2501149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08feabde69a56c1c265bf34e50576d735737e23ea036998a41d9ade8b7093f36. 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/CA62E2401526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786ccd3ee6b56fbf345656ba3ae30bc1ebf187f447d48f9d340065289ef4c39a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/CA62E2401556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78454edad13ba8bcb136c7e3410ac649664673c17ff70e5e011d2504a3fd129c. 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/CA62E2401564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74142c0f25fd93bf4789da5abe04867271716dc27ac1330932aead4ddd9c7378. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/CA62E2401550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6570e186f2b202f53ee05f74cdb8a39d5d6e0d0c8f05f05777bf1f27e9676d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CA62E2501159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c9da5ed215535d26a770115c5f085347f84924b95b544e73435216e84cd4a7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CA62E2501160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a97c0bb96a54ed981d918cfb8731dc78b13a50c1b693fd2005281973d0e326. 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/CA62E2401399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dce7188dd5258a29fb9a6e3fc0820e399b7148ebac0fadc7c6340eb6dd63a4. 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/CA62E2501397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6891bc21669427463b4d414925e224c77b5577191779ba06513c06f788fa649. 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/QZK6H2375526.