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 0x7451307c8522e94cfa68ceb23f99f64577f96e747b57e34ea64f3ba0d98b6735. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a55e45d6-6b55-410b-a160-dfa87bc3c277.json and https://artists.proofprofile.net/proofs/artist/a55e45d6-6b55-410b-a160-dfa87bc3c277.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 0x4a14dd3250b2f0c3e08506f4e3dc989cba61cc79a0bede297eb0d8bf171a3fb5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:04Z), 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/USHM92545995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf471b4d9c726328ecfc6b133fa0769d0a2ae70cc3619dd19ea94d61a14150350. 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/USHM92545996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887f0081d6063fb11ecb3d0815d9466b2e5d8dbaa24799bdfc700573db7020c0. 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/USHM92545997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92417be5dd1365da899bb621c4eec59809d287426829f48dc8c355ae0d71c2bf. 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/USHM92545998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c03648499d6d54b64d7784e976a73be7b2bbd90f4aedf94d489b6c804d4220. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:00Z), 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/USHM92545999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0afd0a249c814cf89fa2cd9f69c5c6bc22561afc9207328973d19d5255677d0. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:02:32Z), 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/USHM92546001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84992692ad1d2cb8cfd49cc9e70e2da5ca544154bbefa69a6b1faba5112970e5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:35:20Z), 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/USHM92546002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f333df4e883b3bac55a5972288e1181d1be4ea31fde6854fa7c31a703c30b13. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:30:13Z), 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/USHM92546003.