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 0x09b3de48de01d3190c8fb6d0c45eb5280a42164b363ff1b8ff429e15571d5ef3. 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/3f302540-5cb4-46ab-8205-fb383aad6681.json and https://artists.proofprofile.net/proofs/artist/3f302540-5cb4-46ab-8205-fb383aad6681.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 0x108f223ac290eba8a6709758b33f84737be26ea9dc7c0176a170c30d65a55220. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USLZJ1968658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ba7e9b29b34d51e528a6faa2fe747a4a7e6745e3980bf24bef7394bf9b6f3e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBKQU2090719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e2f50a7792255dba3fe517ae5621648a1727d78daa6eafa23703b2a3e06680. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:21:18Z), 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/QZ5FN2167195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe275484f36569edbdd2b2f2f7249a2ccf433dfbf0f5e53e0f668a259379baaa7. 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/QZWDD2292437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03311576479f0beaeb2f2e29eb5d4b8b4ab7ee12d9e3186c89e19dd41e18edca. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZ5FN2335135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249943dca69d95e5a2409fdae6bea383f8414823da084be81d1caad7d981c756. 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/GBKQU2485687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b78dcbe6aec6d0486e35b7e9e3125f8b0183128acfb7e530ace1b12c739aa75. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7U2445279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec32d67186d58fae6922d15a3df9b975a03209b14ca7646b0d486572a2010e7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZZEB2430220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998134b558319697fbba09b8cffb9b0c01c62c215417632cf122f0610dd480d3. 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/USLZJ2515808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dad5d182567d9716d696bfec0bdafd61512070404d3d65bf38e90af0b295a1d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLZJ2565557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe14297bc0c9da7ac4b5ef7a54670009c7a0a66ac571d78eade025d0fa7035a0. 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/USLZJ2593123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd862d5cbb1780cf966aacf160dfe08a0ccffcd53695d336e82d0dbd1c92021. 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/GBKQU2589956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebb3a975e5fa265262353cf9d69a1c5ce94b541c4cd13f1bb4899b5ea453101. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZZ8A2559319.