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 0xfd1162e61ea5c2ac675c95c82fa75f90423b100cfd05d3be6817f07d88f42114. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/898fc130-cd51-43ac-b7e3-083a99cee419.json and https://artists.proofprofile.net/proofs/artist/898fc130-cd51-43ac-b7e3-083a99cee419.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 0xbbc5537538c4f0eb804895c769a5ebc2964594c49905bc0528e1eb4676565267. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:40:58Z), 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/USCGJ1155321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec09df21e05844a9b1d006c3351e662bae745d0a7bea295ee394616ff76b4651. 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/USHM91425092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee36057c69645c3bab5bb31dac33aede2a24e4dc7766faa7c28a36d72731ef6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USX9P1436574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3940a61a9e655bf58e55d6e431ac50088c1c7ba7b8f20506333b6f55aa19c24. 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/USHM21881419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bb08abf77912590f86b7d36dad9f391cb663bac335ff625d27acbdaf34a42c. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:21:15Z), 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/USHM22126089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f968b75dde810ee616a63b6e689c328399d1c027b3a0422c581aa28fbe2a391. 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/USCGH2300731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0b7d80f7ea575c3ea214f1a89ad41b418cb1f5aa54c7ba77dae2811bb519cb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGH2523340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8d40abac5fac1d204e70f7fee662db10b55ff266f35ad18dc4f531e7c94575. 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/AEA3A2062397.