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 0x07af3a35269ccc5bfa55423855932a68e1e1b068c9bac1e5125c8a17a82d1da2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8ac2bac-c2cd-4b3b-bf0c-490fcee8043e.json and https://artists.proofprofile.net/proofs/artist/f8ac2bac-c2cd-4b3b-bf0c-490fcee8043e.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 0x9c37165c760ae5bfee428da78545a1ad6547f0e562dae4694c2c0afdbf6f3d22. 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/QT4K32506211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9fea8caf11b203e7bc14b5bec54609347061b52ad89c6d707a96d790ff0d83. 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/QT4K32506212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0939542bc0a3735ff15681d0cad687840f554e5e68ef4c028daa9258faeb4baa. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT4K32506213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903581a82acbfe4adb88a0c1b7e382f74f2e90d653caceb4ced8c8005c204d9c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QT4K32506215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088970d2e5bc0d0f2d0a8943b5149825b8e3dc278293d4f75bfc73a858c30bce. 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/QT4K32506216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd77ccf522db2992b4657dedb9fe37d3c4d06a28787aadaa947badec1780ec2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT4K32506217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3911c75898d1a46acb57bddb0e821e460290002e7f45e5cadf09e857103cb265. 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/QT4K32506220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118da853621499b210d2f192a2340be3fc0398f23d6fc3db33c95adbed355900. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QT4K32506230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cd578070ee4a386eee02cd964bb508e96104831e9a66cc3adaceb629c3b5bb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QT4K32506231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c7fd06d4c6bb4d7365cedade039cebf9c80e51ec7d4d5765d2b2acf70fccee. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QT4K32506232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf39df4c290a8f453cc757103118b6e897b34bba7daaea9f367fa7b528e288. 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/QT4K32506234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b13722382be398a5a94e50e1715e7b888a16a63d208d18228b90936aecbe99c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT4K32506235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4fe4c7fd51e54738c8035f1f380c86a15b1b215e11a50bb289e502ec8dd849. 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/QT4K32506236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050e2afa4f4c916a83faacfd66665abe7b16be25cf22edb6ec1beb4ce9288581. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT4K32506237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2ab30e2b031045127bf0f57d19aebfb2f17a106f68c3e9a5ab99820b1d5131. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QT4K32506238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3ac64649ba5e9ff5c11358c0b4b227a525c6b71a5a86e44e0a79b65af62beb. 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/QT4K32506239.