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 0x32b24124a947f0c888f4db1c783f98f33ece1ed4ad3377a868ee1d8b1d99ce8b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/529cc4f6-369f-497d-8683-ea0a59409744.json and https://artists.proofprofile.net/proofs/artist/529cc4f6-369f-497d-8683-ea0a59409744.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 0x8c5377d19afef9121156b075577305cb0f757da5243f217a2572ef5bc1ad8fef. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:12Z), 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/QZPLS2508906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1770f8882b6f285806f6a59118ddf18b2f4ad60f7811fce32207cb3875b9887a. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZPLS2508907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab14f0044aaa654d0e3ff7f2b52f7720f48e60e489d53fbe7c5ba86f02169ec2. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZPLS2508908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f7218d11422910394a6e95e1b554f5af94232ee49829ac0744ceeeea4629eb. 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/QZPLS2508909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf932835783c591177fe21c2232a0aead255ecdfe7d670af5714b82cbc784501. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPLS2508910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d5c5b34436c32eec06fcbf225d84ff24da85abd1203a2e468dd079ba0d8a66. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPLS2508911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff0106ea34795b840206f02f0a638d3c7e64b7e8489dafbbc46be9ede4f2732. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:54Z), 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/QZPLS2508912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a128c40babddd7cacbee68ec5863ccf82a5d6ae06b7e69859688c72da4bfbe9. 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/QZPLS2508913.