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 0x6e01ca5bc262d458d92f1652bef040d862a2aaa1a31076bbe5e059d06559fd5b. 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/83364e58-c273-49de-a96d-2a2d6bb91298.json and https://artists.proofprofile.net/proofs/artist/83364e58-c273-49de-a96d-2a2d6bb91298.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 0xb7d534b3707254531a594529657123ce81cca4c53c5b686dd609a99f2106552d. 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/TCAAW1161683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1882891a95a7868e213d56fd0febf61982a85f8ee01813fa5ff52cdcc1ebf59. 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/TCAAW1161686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c556e207a1e53076bc076e0dd0ab359555dea5a3c076408ebb2ffca33aff214. 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/TCAAW1161687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa07f95fbd9d4753617159358ecd70c8d1c00ff102f5682adbc4febab36fdd78. 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/TCAAW1161679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1fdfaa0bb97493f272f6ac9d809c84e0cfab4a8f1a0e77619ce6c2a73fc5a6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAAW1161680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c7f0bcedcd4eb8317cc196eb43a2faa4b6cecf2e1325efaac75ff0b16cb185. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAAW1161689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9a564978fec2db015c7708084f77df9cc7a6627b2da1b407c6f0e98d9b43ba. 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/TCAAW1161693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fd00c68096614eaacd5e2ffe74627ba5ead04c4c058436710bc28468f667d6. 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/TCAAW1161690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7656d5b24ca7fdc6ec629e1534b5cb07d59712b96caa92487c741618569b4a22. 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/TCAAW1161681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0570caf3bddadd501bc9a77753d5975981c9910833703c2879353a8b19a9d9. 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/TCAAW1161684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce3e3149185150e2cb1e1c8b7fb01b2995500672196e669be91f1ae459c70cc. 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/TCAAW1161685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12185d8bec7109372e45c949dd4b7b54bf0e77f1d153518ca29f86bff79d97e5. 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/TCAAW1161736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e152a2fc18736c9eda943ff85031471d1e1101fd4165e155c387aa9e4a1176. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/TCAAW1161735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617855dff5b76affab46b02a381ac2ed2d6fb8a810a0cb1bce427de96101a44c. 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/TCAAW1161739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8430be1ab149c87af9d8b9a1303a10a6db1025ca0b0d9b1600806b06ac0a64e4. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAAW1161688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30973d9694abec3614cc84c53bcf5f2d116488b2b4f866412556e7d49a8d750d. 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/TCAAW1161677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767edd97d9aa5488d8ab00fa922ae4a4b090e515f6105dd489e16c7b5a62afe5. 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/TCAAW1161678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d8b34badc0bd0f7d78be6502ce8bd6a976d0223fb233aa2acf9683ff978875. 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/TCAAW1161691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5d056c58deb3d0192e1b099065b6a460dfc4a70dab35c9acfd9dfcef49c2b1. 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/TCAAW1161682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a348c7f5f63eb263dae7d495ab0eaf47a66225ca146eef190a7d3185604ee8. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAAW1161692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa3c2c597e725819588fa3af9dd05bd47e6d3c4d91f1f1de0b66658f536e0ea. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/TCAAW1161737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5b5cddc4dec2f91e3aac285b2888d0304073fbae9b02cf56a52dfdd6aeaab2. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAAW1161738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b811c6f3697dd92e325648104c901a36ee49f34f8a77cda70c59fb54e8f9209. 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/TCAAW1161740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9926f2f1d18865706cd5d3d97f7429c59caad403f791e6569e963e3e9ecbc34f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAAW1161742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb7523baaf9c64d39bdda52da87ebad68fa20460c6c44f6fc12c4b0c63cdc70. 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/TCAAW1195487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c1813bc6829668c58b3292841c15d43b283bda59d2b15c19fe34f99e385743. 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/TCAAW1195492.