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 0xeac715420cc93195060a9e97282018116dd25754c179a8582ecf6e80582962aa. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d987090-615e-4dcf-8b6b-c03fd5f8a28e.json and https://artists.proofprofile.net/proofs/artist/1d987090-615e-4dcf-8b6b-c03fd5f8a28e.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 0x72a367a29cc449ae50c0079bde1d06126a34e0771dede429f2554647d1676262. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJW2599237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9ee79aede64fe13259d6a40e68d7c696ff76c1b009707c117d2cf7d8c96ad1. 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/TCAJW2599199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa589f2cceb243315e6e3a3bb5fdcb082abbe008a03232d327df564fc94040678. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:06:18Z), 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/TCAJX2523088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c0ce39af3909945db33ec9ba8d35a5c9cd7e067d7d64808df4295fd7c4f0f1. 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/TCAJX2523109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3798b21cd021b1e4cec6ae33bed1379242f4ab42dbc06f0c88eac88cdf6c3a65. 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/TCAJX2523116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f4a855baf9708b5de26c09b382090fe3c8749547f88e850dfb28b2c18ccf19. 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/TCAJX2523119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed482e45be4912f9b6b96ab7fc1f722981d776b117818c2f7a9b1aef35e6a8a9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAJX2523127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f4a97bb32a60b286d47271b5639dfc44b5cfee13d76fb132aaea1f94468b13. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJX2523129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f311d419d26acbba925c50dabf7b715a0df82e65d276b6187d5e3e9abbf097. 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/TCAJX2523197.