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 0x040838f7be98bb81a39d759f4fa31a1e0a14e2bcf3b5292c045b472029e26de9. 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/31fdb49f-f0ee-4c99-bf51-bb67c3a0f605.json and https://artists.proofprofile.net/proofs/artist/31fdb49f-f0ee-4c99-bf51-bb67c3a0f605.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 0x84f93f7f48b4d9a83dcd9d4566dd6474553d1534c5038d6b17aa6c654f4cadf5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:33Z), 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/ES71G2030667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc334591efca081765ee4b06018116503414b78f553e1bef7dbb6a15ec0c93b. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:33:25Z), 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/ES71G2030673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1764c218fd89ed1bc7ca1cc58d8f67d7fc7fd16609c753de49f4748bb056e5d5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES71G2030664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1f9441488c080ee6d836c5c3906c672ad681c4f1acf3688efc6f44bb6b7460. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G2030672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cf29c91b85ff19d38ccaf623d85ceaa4d52ee371f19ba0c9e5a3fa72266c56. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ES71G2030666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4863114949c7e8e39eeb260d8a9bd8012c6e0561b4b254ee6558ec1a0aa09024. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G2030669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1164f9a6603f526864e67c547b899d1911c9b2875553b04c17fe5da56a2fdf3b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G2403374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6353d1c408c67f86c0af8f0fe97ce996e9c1fc5f3ec1b2f256d1aa75401d8a5a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESA122460714.