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 0xd8638ec4dd014b7411cb1c02ec7bdd4b3f64a88183fe2ee60d3c3a306ac6b567. 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/7a17e048-826e-496a-9164-783d8fbbed86.json and https://artists.proofprofile.net/proofs/artist/7a17e048-826e-496a-9164-783d8fbbed86.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 0x6320fb5739dd84e3790d4757cc9ea4bcbf7a2383dec3694e900e75bd4a4449e5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFJ2372412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff0ef2f2aa0ae8b70f4c4b94953ad12250b1ea4b3ec32df900439d3446b86ae. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:51Z), 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/QZDA52494810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538f991aec7d837eacf5008768446797de8bb898f39d148bd4bad37f4a58c7c8. 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/QZTB32441497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b9f7a9058b26bfe5bacede1be0f954b928f498a725e1bc6a4e89d4cc4548eb. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:09Z), 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/QZWFP2432918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ca738fb5384d0c90a308b235ea62e07a218c65544f9a840f5e4245cff4bf08. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA62557161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49dd49d5af7d4d82e57b4b8d6c8cfa1d86113dccf6b0b36688596c564d8d5d3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN62553269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510728538bae633524aa1489cdfaffc8fc5b9f9e73b675a08dd3861c5fc89c83. 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/QZK6F2590792.