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 0xd0561932d3813c341615ce546968915eb3bc6c0b997b2bdc9cea47776b2a1426. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/216f6d79-6411-4dd2-b2fc-91b24e6cd185.json and https://artists.proofprofile.net/proofs/artist/216f6d79-6411-4dd2-b2fc-91b24e6cd185.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brass & Sass! (Original Comic Soundtrack)
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 0x40ccadefb213d608aa1e841031f8c16a27a210e2fc65e76dab0d2f33055dc55f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFYW2052249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e366fdd30082e5aa85044e9d6366e048a76e8f1adfd0696610f32f260c9559c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6Q2031695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2536e14afe1cea31cd6682ba1d1e05ae58477d6ce42e26bca22d00d664d43aed. 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/QZES52186968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016077eec82bf245d73404e8de28036f732cab91dec14d6c36172dc4cef0846f. 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/QZHN52146189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645dead0c11b2c83a3b3be4028271c12a92912941086497f2968b492847c8a33. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6P2113175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34be28de2f45d4ffaa7843c22cf03649bc030529ae697991147002670ea2b99. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN32252011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5a7e321293e0fc7d4c372efb2cebae88d0adc34997ce688b058cd4c453f316. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN82313795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25f7eddb8c8feeb7b812e2495b9353ee586f4b5e6860a88e4b20ce2883d94fb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBC2478754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97136be8c4c58dc37f6d69d5084e5254f60321a36f085c6ef7892b2afb51c0eb. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:43Z), 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/QZTBC2478755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2b2b13f364c1d86eff52d81d628262616981f02f910ec8cdff5eb8e3c38510. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QT3F32402208.