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 0x99d0c0755b292304a6f5bfad507ec51f32f570e34d1e56ef62789bcae7caf608. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d705a964-81f4-4e67-9785-4e3c6d32c3af.json and https://artists.proofprofile.net/proofs/artist/d705a964-81f4-4e67-9785-4e3c6d32c3af.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 0x35a5ae2e3c8f0a206b095b0879d2785043121bedb65f36a97ffaed7960062176. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/NL5UZ2506650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec00e90cd7b1bf289020c15b554dc443722dbff72feefc706cc8f79918bf0f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:08:34Z), 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/NL5UZ2507060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb665d9d1f1a31f925ef8dad27f0a78bf45202a933cc572636bdf89c29a669766. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:33:50Z), 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/NL5UZ2507063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca1133e25d3baf3422c19a81e8c318570dca53f4433fadc9eb85895562e6b55. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:41:19Z), 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/NL5UZ2507062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a48b2e7dd4b91f6882523dbc124d89c6d85d5017cbc060a8ce1d5862b912ac8. 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/NL5UZ2507064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902454e82670508576458b089944f8d03d2cc1afc2e94bb4e0dcc38c7e98ac51. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:29:40Z), 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/NL5UZ2507058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40b573e40cdca149192ee62900d5dece75b90173292593dd5297753cd68af9e. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:43:28Z), 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/NL5UZ2507489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce136bb66f6074e013543cb240fc64dd888415d59396a69230135e18d277648. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:20:04Z), 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/NL5UZ2507487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3abbd2dcf20532a5113494373085ea151eb110e5a8b42d3fc0304b219f5c4a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/NL5UZ2507486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1af0548607c9fcd372e13d57f07d3f03406b37de1cc63eed18c58ec4e8cf7c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NL5UZ2507488.