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 0x5a95fc23940ef2dc5fb00c3baf21f0810daf6cda3bba56ddf4f62e82d1a0b506. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1863edae-b592-4a46-ba67-03b1f55af3fb.json and https://artists.proofprofile.net/proofs/artist/1863edae-b592-4a46-ba67-03b1f55af3fb.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 0x15068e1d015f6a5647476263d56bb0205f3157c36465577ea9ffb438ba24a952. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZEQU2062414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3217b93fd271d1fea172792fa3a1a428da47d460308c1a02c0f9ce932010fb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:49:59Z), 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/QZEQU2062415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa497aa93e696d9e2f1b54994165bba1a328275afb758321b3a45a6a6f2529e4a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZEQU2062417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8fe93b2a5c38bc4247d9e91635d29c24ebc805344c4874fe9e965f3a75bccd. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZEQU2062421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03b4e063aa50bc3f3bb63e3f8ccc409045b17faea5cc905234aebcdbdbf60c0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZEQU2062422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e3031d8db66d1c0a20eafd5350dc7b69e0902964b1e6745c4fd67210740b7d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZEQU2062429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45382f548d838af986adf7c82969d406febac0f1d7d8d4d6fa879a9252fd5e11. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZEQU2079654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02808dffcb41135b2fb2e1e53b44c7a16e5d5fe465c2ab0109bafe8f7b7e66ec. 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/QZEQU2079664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da59c57cda1dd0756ae3a5bd8ace3a5e462b693d6514b8813c0d598f0da4d8d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZEQU2079668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a590c0cae3a0d9b617af9d7c903dc7a245e750d420d48d3b00b7ba2ce62af8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZEQU2117924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ee3c2087fddbc0747dedfc7c152d814866b23e54462f44eaa7ad489d4817ad. 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/QZEQU2117927.