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 0x4655b783faef3dbf4334ed1a7ccd27a98be9e4c7c13023b11002b029c1b9b096. 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/7d16f8aa-040f-438f-954b-2cae22bd8697.json and https://artists.proofprofile.net/proofs/artist/7d16f8aa-040f-438f-954b-2cae22bd8697.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 0xc6481f1024cf06df663122df78f9c8dc468d566c2daf6adb2ac96c682a587883. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:32Z), 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/QZGLM2153842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cba64b9411806b74c0228ba5885b34ccbb8ad98f8014ead06c85321d7db583c. 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/QZNWR2318551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff36dfc4564717da50de23e2a448f95842bb9890fe3dca71330f43f0cecde5a7. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:25:30Z), 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/QZHNA2413699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdb200f7c3ee7013c8b668710de3d2f56b2a79c0515aaa91520e9f8b85d47f0. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZHNA2413701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbf51644075f6bf1ac144ebc659891ef53f2fded34fbde5a87804e70a36e020. 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/QZHNA2413702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194cea33535ec90ba377b3d7ad97266421fbb9ce18e472703623ff8be925f9af. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:40:13Z), 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/QZK6M2563072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a6c5df02bf3f4f463cb7b5051ea2bf066f3d42e020b209ebe970f2a973f525. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFR2566450.