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 0x4f3110e16a0b5f24948b82d29224251c511472db5bd4026c41812bf2e1febe76. 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/96da6020-a817-44c0-9b0d-7007774e8a23.json and https://artists.proofprofile.net/proofs/artist/96da6020-a817-44c0-9b0d-7007774e8a23.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 0xf91c9e5a7f5c24c35b80ac514b5c7cf9ac180543aeb6a264acf44cc8a6b9892b. 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/BRUS31300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb275439ddd6aaa0d75c9e29191fe3f73b1231f5b3fa960d9a9ae55da19cfd883. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:43:01Z), 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/BRUS31500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c353ca5a162a99e037ffad8989c578bc3e267b010d3ea7f9b5c4cbbc3f2b50. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:37:18Z), 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/QZ5AB1854564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6092e4b203a6784ee6e1be921b71d65cecb79149752b340b11c0f058a662099. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYM121602632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6a5f8ddda52915124502adf34967805abdcfd0adc115edbeae189cb36ea514. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRAPI0603434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d81994c557a18b8f08c86dad496d226884bb933b890c23de4a72caf3dc89a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRUS32400002.