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 0x01b32864c1f501f3b80961f4a12bd8acdf040dba8f3f8b50e72959ed75cf97da. 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/22fff0e6-561d-4d9f-81a6-b69d0946b5bd.json and https://artists.proofprofile.net/proofs/artist/22fff0e6-561d-4d9f-81a6-b69d0946b5bd.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 0x82a9efa01134244d49ae475dc210b49e762c8ed66f3ceeea8ca4a87e419dacfd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4TX2254054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b8b85f09e18a7810df2551efe5ff366e832cfa2e4073b6047c4c57fd72f3fc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FRX282016306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e921d6868151bbf3d2da4fa6804ef4c3892010fd2c58765846a13a246449289. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FRX452128983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa219ea09415ffce66cc88feab393a4dc477a764d3cceddf67d4c7d03ac3ecb65. 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/FRX452128980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58121127d282fdafa2a3c9102e1241edd490fb08244d321baaeef1ce083a5a1. 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/FRX452128981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3da9d91fd9849b842051347b54ab3b803ed882fc7bfebd2a4c1af2f073bb1c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX452128984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50976b8850aed8f76cf58a8d5fc2e470607d71baaa97077ade2e1f30bd7b5254. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:20:37Z), 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/QM4TW2250062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf40b8f7db3787426519b140522923ac901547888631246655a6410c2d40539. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:13Z), 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/QM6N22257954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f000104f4a9cf9128d79b1682858a44968f010c8387bc4041f634482fdd6fa6. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QM6P42225501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0664a7049535fc9e3131efcaf442cdc33fd235c7596774b6a29f93efee328c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:31:42Z), 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/QMDA62288451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6271f7dd91f4d8ea37077d90b8b8675e2d22a9844f0acfdae61ebeff7c0f7539. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM6N22368640.