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 0x214338bb087e1aa9167a65e4749317a41d4d702ed383dcf54246ace5f784f83d. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0555eb18-e5bd-4221-8529-0f58c0e229a2.json and https://artists.proofprofile.net/proofs/artist/0555eb18-e5bd-4221-8529-0f58c0e229a2.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 0x98d8daf36da7374701cc148a9b6e98d1ff2e52bd7e4e99e464416616e267d90f. 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/QZZ7W2458732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f938832f00f0e258252aae04b712b86f899ee12c4107a0272021a25392f46d0. 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/QZDA52546217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a42449ee43a044424e865d4fe1995b3c3816cfa13f48269d57a017c403603e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:16:20Z), 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/QZDA52546218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b82603c5dbb454a51913a4524807b18e8d9b8da91e9f0ad6223ca1987ab3026. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZDA52546219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89fb8182d6ae5d5a747656bcf980aad0a92e114452ace42b6ca92a6cb24dced. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZDA52546220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092259f75ac651d92c4c10419295fbe2e5cdad20a83e87339316d0a01106f104. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:54:03Z), 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/QZDA52546221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639939851e3b23f41eed9ada7fab52d2fa07f0de2d6503c395b17b8b0cb894ae. 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/QZDA52546222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26c7b63e3b479832ead06244461a204c95375722e15ead2d3ea976079150ffc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZDA52546223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7010a5887403bb5378761aa01fd66a29593607f72ea07b62e208fd92a29ac27. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QZHN42566590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7010a5887403bb5378761aa01fd66a29593607f72ea07b62e208fd92a29ac27. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN42566590.