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 0xf9529da58d9960e9ee3900abadcc157f3fb7436fe6b4a332a957644637eab932. 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/b3fc1360-0795-4c0f-95d0-67a4f5a7589d.json and https://artists.proofprofile.net/proofs/artist/b3fc1360-0795-4c0f-95d0-67a4f5a7589d.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 0xf016c33aaad3b65896c4c565417eedf0970a47163c20cda24f6ccbf3ce400205. 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/IQA012101440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edcb5e467fefc580b14303ca8c03b7dd66cc2d96b9a8c3f983051fcd26c8c4f. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/IQA012101442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a10ce949e0b699828937b065916ed680dbbfed65f01a04263d00e031bb6107. 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/IQA012101448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670ae8e078d547ebeee108bf5f905707b1eec20da65155e7c91883dceea5b41b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IQA012101436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7598049e3b357c0198bb2e2ad00688e4a503a166bd097fa868ab04ce86fbf7c3. 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/IQA012101425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca89079b91e7e540f687b215cc095e784fd91b6b6836add7f1e56c31907f445. 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/IQA012101444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd109aaa5c66f5efecc0fd7f675daa38eca780ae826ecf5cb544ff4fe171e8c32. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:58:34Z), 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/IQA012101427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41db3216f62246dc3bcf2ab1ddcb5f33d704efaf398b01ca466dbce1e94d0a27. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IQA012101511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef40149d17be2ea667681930b3ca980151854ae07aea9356ccc370cc5042d7f1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/IQA012101510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c892ba531dd36b8dacf87835ac42ef2a4520bf32a4f449d36bc702f1149e027. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:09:46Z), 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/IQA012101411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7154cec989607f06b23ca6b9ff51151bff217ff7dd7962ca4a3bbbab5034e2ad. 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/IQA012101432.