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 0x40991e8fed127a04cd336415c09f8fb257c63ce97c31ba14230e02985aaa62ed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5886f0a-c6e8-4e39-b9bf-6c546281a217.json and https://artists.proofprofile.net/proofs/artist/a5886f0a-c6e8-4e39-b9bf-6c546281a217.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 0xc7ea0baa465e5859eaf252806ebba2da0893b30236bc569821c89c16498613ac. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEAF42100437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaf5efa0b13f772f94d77e11eda1724cb08901a598718f5e63b86d0841305cf. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEAF42100438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2131bad6d6d3b25638a38a01e0cbc46d569646fd3fdf6e84ad02d329beae990. 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/DEAF42100440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e0c02d55c2952b4d1b27d549aaa3367088d10d6dc51906df5e66e37bf35fb2. 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/DEAF42100442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb1f13d535e690c068a7ac7246804b39cb7efd558f913c87d4ec76a53cdabca. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:33Z), 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/DEAF42200268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e0c1c2dd753548228a573b05c8f3b13d9a24d5dfdab67a25acdd4bed53d155. 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/DEAF42372010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8b0fa61fbeda535c8be6d00cbb24bcf0ca58456f63217dffcb9f02a73703fb. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DEAF42472006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22502e609f985a25d6c3976469fcbc39cc157f35a83de83d3bab967ec95fee9f. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEAF42500350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd862d8ec13068418a6a9a779778b91605672db24d34fae18500d521c89197825. 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/DEAF42500383.