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 0x9becc3e1cee6c36213f04f33e1056d62cc9c40c4ce17f84649811d39df1d2929. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7b45fce-3638-4b5c-a5a8-00aa5f4161ac.json and https://artists.proofprofile.net/proofs/artist/b7b45fce-3638-4b5c-a5a8-00aa5f4161ac.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 0x8e1b83881b4e331d2ccb7d9be702755c67f0eb6c7e873eb22d268d40b31b8f63. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ES5050800525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910305e6b5d7749e0e39846b50a2619c16eda9ecb88703e99266c94cf88092fc. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ES5050700401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c878f6cd5b1ccedc2feaad4dfcbe03f86182771d50969bbf638b94016556e56. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:32:30Z), 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/ES5050800288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4249d135ea1ab1b47aa007532d20af4020addf7728038fa07077bc05052f37. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES5050800268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c439e2739b040d4256f5fdbf37f461e5dd4d85ab038014fc26180c39e7168a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ES5050800303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eca7d75516bb88f04f8c296abc09eee2bfad2a4df6063e16369ce6714af10df. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:18:27Z), 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/ES5050800305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60fc978bfd1b819381848680a0552847f4e2faf8c8cf4ce5e206d75dd2a5038. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES5050800308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22dc68d517b8e690da665a72d23893dd8151e5e98a7ee6a11e17f4897a3bf84. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES5050700399.