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 0x70657e647790fa1c54ce43d61b4325fcb59ac7ed7aae5acf398f43479a46fa6e. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d92212b-2ddf-4ead-a91d-ee0143e5c822.json and https://artists.proofprofile.net/proofs/artist/0d92212b-2ddf-4ead-a91d-ee0143e5c822.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 0x0fe781449912819e7ce0bc9dc297180990484b187a4f044e8db55598e959f752. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/IDA832405758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559a59f7a013eec95bad5904f18e60fb29d3038a0d8b719151c4e518c31ad01f. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/IDA832500464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f93356f22cf85b5beb46bbfefe1d0296331a43d98e16337464e28429326ab5f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:00Z), 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/IDA832501661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9ffecda8c74fb4b964c43dc01b89db548394d09381225f910bcdaad82b3275. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:36:29Z), 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/IDA832501631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aaf2167bd2dc1704ca10fbec387ad71687552572c22b287e47e8035e0c4d513. 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/IDA832501848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427fa138c1d02f083fe3fc707a9d21f7e5b581b855c9e8af4959e1f1dcc9e836. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IDA832502973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a9c35758f483dc69bd722dfa41cd4933d9bf538ecaf670b0f811d2b48d3629. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IDA832503204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0283d639ce00dfffe374800acb45d1174ae1f7235d1609d33837250f2e368f5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IDA832503768.