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 0xf28183775072db8880a2215b79beba9457579d004b683dd43ffefe6e1d881724. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab873477-69cf-463a-9de1-c2b0a79fa076.json and https://artists.proofprofile.net/proofs/artist/ab873477-69cf-463a-9de1-c2b0a79fa076.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 0xfd86c934a8a681a438c94679d347d7f9b0ef0dc29a12c5d074dc8951919c9573. 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/TCAEM1996831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2793152dd31b96b769fcc3334d8c333664eb3298a122715203be46bd4fe0d78e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:37:50Z), 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/GBSMU7190163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2b446beabaa72052e641e799babdc28dc98b588ebd46a97cdff380682e0234. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:27:16Z), 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/GBKPL2084731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e853e11caa94dab0d9911e67cedd75d7c66cf60477b64e0507f1fe0a4db41c7. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:52:27Z), 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/TCAES2057381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3928e017c327b19d9304ec34c615779f93064ba83f369fb60cd7d497fd6fd1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:27:08Z), 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/TCAEY2038306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc8caa4ad76d7fa2e3b3c4909ac08855399798d78668dbc7788c475c9af461c. 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/QZMHL2028445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8830ddffc5489d8f657378405687feeb504c38d14ee9e3b64776b3d32ba667. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKPL2001977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485eb831a0dfc25ab3d664e886c66248fc085ae7239a5ba751731a82760e8bcc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2039800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a4b75532a7f821212d110591fcd34a474f74781b2ebe86c0c5b0146117458f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM42K1868190.