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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2220355f262d4a787e96368f9d81747620536bfff147d1d8692a4ad66f69a4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a59e406-fff6-4553-9b6e-4e42134ec360.json and https://artists.proofprofile.net/proofs/artist/6a59e406-fff6-4553-9b6e-4e42134ec360.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024cbf39edc531e5a5f65851ef6fc6ac0504e8d1b7a0bfc1ba030c99bd75824b. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:18Z), 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/QZDA62084931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1a305e4e7dc3bcc9e7268926a23a87158f55638faa09112b20a98b61f9ba02. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QMGR32279915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf0c23857cc6d8d446afcc01c4b26f887506072e0e3657647b1f1643f96b175. 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/QZK6G2201482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9e66457d3ee4db0f8244d12f8abcc1f65383ef4807e1d7baedc5e3acd8449f. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:11:28Z), 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/QZHN52378120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d489cd3465215931c016e7ba9691c3e9ef84ec2351ee55331e0edc1efb4cc92. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZES82429164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715c7194de501e7a61803be3723a1761000f9bbcb14e8c215879aea57e352842. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTAW2481128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4573b50eeec12a67ffe4068f1b68ca5b5dcddb9b44aefa6a6f24d46ebbfaa682. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNB2468415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878ee28b9e264cfdba9e4a30fa7ecf2abd0660639847b6d23d776a71aefcac15. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:15Z), 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/QZTAW2481129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afdad4dc9eef7f3772636f90955c6bb67501e64c06ccf166ba17ca0fd5af646. 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/QZK6J2408534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab72c34329448426195cb399e6c7a8378515802002c24fcf113b80f2be03042c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTBA2473537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb9ee3325f1d600056e89cc8ac6719d036a4fe85ed4993eae9cd746e2a12f7e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ782479751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6d4ea9380cad05f3352a96f9424fb9962c830aecd5756f13af300a5da6c489. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:18Z), 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/QZMEP2598074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc69b6fb0d5775ead0a468170fc67e5f918ea19471b4a65698c92a697bd391c3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEP2598075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da44f1ee0ac5a5f5b3d5f0d1633186c7f52ee91f8f3a9c2baf231cb30bb858f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEP2598076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d129c5145258ac602d6e6a36eeecd06cbf4e4fc9602933fd95eecd10269c614. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZK6L2029494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef46f68ee27553903c02961275fcb27e21f5817b883ff8c7a262fadab270917. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFX2428641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f737a47c923d201bc279e1f62fe73e5640228a9d0f1ade171a645fdb4ce743. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHN32385319.
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