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 0xe6ee0c4e16250ee8d2472850a5d5243f25a93ee15625518bf37221a4e1115da9. 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/435504e6-8d39-4c45-81b6-4c565ad5948e.json and https://artists.proofprofile.net/proofs/artist/435504e6-8d39-4c45-81b6-4c565ad5948e.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 0x118945961c8c7a04818c9cea6fc1bb5dd13a0da7e670671bafcc353519adf625. 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/ATHF61100702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d90a6167f4547e06848d0cfa46dcdabd608fa98943adc3a1cc5d11be590ebcc. 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/ATHF61100705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a27a2a2393bdf09380f430238cf48953e32316877d2e453ea94982fee8a279. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:53:39Z), 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/ATHF61100709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939b34d0d02a32e5ae956eef28648f89cd4046fd905c5df8fafe6a4f985228c1. 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/ATI211710501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86145297b7d2f8b16748aab1c0e0c28e4488154d45bc4f80f2cd49abe7e3faaf. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ATI211710502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1640d72b9155dd601b2d743c3f3c7e4da01ed440859801937cf5305121712c19. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/ATI211710503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9adbe424c202c7912c3cd107637adf46e4593c79567c83275c75b9a94bf300. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATI211710504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58beb8db598b2b1c1a54fe668309a09aebeba9f58d710f755eb9cfada82e1b3e. 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/ATI211710510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a382d3f784c294380f803db73e25747fa44696b181cefc29939a81885c4bc8. 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/ATI211710511.