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 0xd1780ffe75767bf9df3025a7b83b39b2fd834f19602f72c8ee006f7208ebbea1. 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/e75d934d-ee86-4154-8676-cab098e67541.json and https://artists.proofprofile.net/proofs/artist/e75d934d-ee86-4154-8676-cab098e67541.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 0x5580712fb29aefdba46166d598462e3c1b4fceed3adc53d2b2b1cc0b24dc194f. 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/GBMA22556542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c01625ab226fc4a7d63732d9dc7b49bfe2393a32601311b7631c74e2c1b60e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBMA22556543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e58ace2bc3313a6c79d6c35f7d40dbf05019d12858e853701bb5f553ba81cc0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:42:33Z), 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/INAE32501461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b01a7f359f1bcc7005db713fa024bf4ad3d0e6b11f78def0c4bb15ff76c6d5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/INAE32501465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdf3c95c282f47b9ecd4c9dd2a4b0d2e806abb0e0b3343b3fce5a70583163ec. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/INAE32502266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f4946d35700608e8ce94c5b91df37d2dcd494e71e79728df3a5f936d7aaf9f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:26:47Z), 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/INAE32502267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec9eb2abfb5eeb81a3371514951906dbaebe8c565414ba00fee8ea8e194d8ca. 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/INAE32502265.