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 0x68348f1c816c3930b3d3c7968e9ce5b1ba76322dc51644d72074e592b7bb83fc. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6589b0c-07c0-4b0c-9115-a3844f3bb437.json and https://artists.proofprofile.net/proofs/artist/e6589b0c-07c0-4b0c-9115-a3844f3bb437.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 0x4a75539686c3f5b3e386a6ffd5fe6acdd48b01b2af1f4e797a2ea18c136b8ab9. 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/QZGLM2158032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9702ba8de1ba65de8e49988b9d0a4d38e2dc8a04a731b0bca92647f6ccaed78b. 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/RUB521210663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16825e109055e2bb468c4b731a0262396f4e125d4bca6647fdf5f00949bc8957. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/RUB521210560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e11fb5da4dd44e082b65a171ce18ec614cdbf8a34b7415d296c46746a48e2aa. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/RUB521210547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762555aa0223750ec5daf3ee0c41667c4c178d51680e8db1bed5ff5305a2ea12. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/RUB521210570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80047dbc047a4acbdb9628852dd0fc7154f22d6e7770796e28572aa72276da3a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUB521210574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dcc676e987e5972e40778b5ad744ffce39a6337d38eadf530867da87560e4a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/RUB521210578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c2db41e26b1657e35ac1822b1b3c6c959b033fe4eca5e65777291a734dfcb0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/RUB521210563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc261ae50316c91b984f8213b99d2970791105cb08ac0b85d294f15443a9013. 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/RUB521210575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523acc470bcb2386328a2d4b2bc93d022d36d534cad72a723a4a8ea62f79f59f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/RUB521210583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c66aaa444fcd8587d19c1c720ffc6ec713786bb207f4db229df7094f3220b9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/RUB521210534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4351ac8c7548be72aead67e32dbee6f514c89872c3f14a8add6216c25100996. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/RUB521211321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad576f29899d51d3a2fc8b5361b629babe1e406f2c33c2b5aa8bfea3eb40716a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZNJW2324410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed451d8116768157bcf20b7392fe2b288558faead14ce8a754c0440da350d3aa. 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/QZW9L2433148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5560c659d1d4f8ed50c9db61aa5ca6c521f9bcebbf2712972e2ffb13a2b85a. 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/QZW9M2472312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8edc08629b046301fa2832d1a38ab6b7bc0e8827c7e97e0289c2efb7cd9c0d. 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/QZGLM2545230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb680e2f5823b94e2f36dd78eff352f6b426fe2df9aea87404ee07942f7c4dc38. 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/QZGLS2585544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f82a958dd5d16dd6e9dbd327f590b40a1f480fcd4b962e92bf6fa49effa34. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNJZ2598783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6288672138ece16baef5b094f8be0bd2110c543d36025a9ed9f200f6cab46aec. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTPX2594530.