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 0x810fe7da82552d68d3ce5db3426ce97e8664edc9dfa1bfb91d753d6f69e99bdc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4283c4c-105f-4d9d-b0ec-05e606475fa5.json and https://artists.proofprofile.net/proofs/artist/b4283c4c-105f-4d9d-b0ec-05e606475fa5.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 0x75549c5c3e065fe57e6ae7af4ed5c68399ef5dbdf09b67fc4a94e3f5a2bfde3b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:26:14Z), 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/QZMHK2314649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47ceaa12fd926ccf00ed0f142bcc7fec0b212e949928950a5cb6bae0d9226b2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMHN2380225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162613d4003aea433ce96071fc4420688ae5971642cc238c158f76b10ad8ea57. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:28Z), 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/QZMHP2389139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3ceffab82f11e1be818b40c8c308cc6e42bdc842037f13c1c24300598dd219. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QM42K2332943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b10adf86f2865e07a081161371e63ad9426c5a277bb2af77c82334b857caa0. 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/QM42K2364691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f459a1f9897195e8342e5b4c780e3c25400ecf84ce768536330c442c3320121. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:48:03Z), 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/QZMHM2337396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebf65189c511497bd9ba633f33b4b7f883f94f2330d80d827af6a45124affdd. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMHM2381141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30d90e3377565462e8070bfa9217ce2743a37c8a2ac53efbde032574248f645. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZS632336622.