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 0xf527da985edb1c8477e4c5b9a44fee4af777811374bbd6e3c56fb81d79526b21. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/457d1aad-e13e-4392-a3fa-77c349d9d976.json and https://artists.proofprofile.net/proofs/artist/457d1aad-e13e-4392-a3fa-77c349d9d976.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 0xa6382ec50f30c9f871b2b1e26be07db2101b9f6fb9f161ab6f31e5778d4285ec. 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/AUMEV2585383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081ed948e46bb2acac78816309200f1ee79e4f1022b30a6881fd89b6da37f495. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/AUMEV2585384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150c15ea3c838e9b48188e6cd0c352ab5e2221b7fe75fd95cdaf73b63486eb9a. 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/AUMEV2585385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2746c464b861f1fc9bba30413567b21516c3c07e46331bad910fb8ceb4d0c6. 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/AUMEV2585387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f57264d7299029a27c7a48767be5654294833cffe8214157e51c8e3f7d32b03. 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/AUMEV2585388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0674891de650b284e7a976e4146a9ca9dd601c9504dd0574f404c0ccdf910c59. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AUMEV2585389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9711bb2b0320a8018657a5172181cbbce03a52500304cb76cde18387c18cff9d. 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/AUMEV2585392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68eadac37bfc4e4a33caa5e6593a4642ee718aa8c6a023f8c882c5e21f09b421. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AUMEV2585393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e307ad60756e91f29ebb3bd87c7e154b88ed13a5897018f482389400f38da8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AUMEV2585394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d85e4b6588df2a1fcd41bdbec82baf2e3089d3f1eb0fc2fead1acf205c12e2. 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/AUMEV2585395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce08fa646b293f501ec1bdf79d3894abf0f538bf1cd42272b96a9a0102b9b704. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/AUMEV2585396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37ffab8ce46cac65acafda125ed5424f311dbe731c43a7654a07ec0b8676f36. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/AUMEV2585397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bccc63ce496391e3032e48d66e5c3c0710f08992e65ac0e08d82562f25547b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/AUMEV2585398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a86b222a1463b06e3cfdfe75ef46a702a6f4a5c784e88c16ff63623ab9f4e4. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/AUMEV2585399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3dda45dce715c2c6b1976f642c68b4bcb4bc478d5dab67cb22a91a18d525e2. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/AUMEV2585400.