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 0x0c24f67e50b92b1806f746c286d30138209c735ebd5f3a9060aa57856582b6c9. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb2ad652-373f-450d-adde-4542f25935f5.json and https://artists.proofprofile.net/proofs/artist/eb2ad652-373f-450d-adde-4542f25935f5.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 0x3045a6a576e2734f4635422925055786d837fba6499430a8ddfb11d43115032d. 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/QZFYZ2323444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d03e9029abd8d77d7746dbe1c072c08a6ca938d773eb48a6cd8d04e2ef96e81. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6Q2268670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7520afe043e3d242168ee4ba8d19fd8c55c0026c096661710d08e516dd3a6127. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:24Z), 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/QZFYZ2323445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe23d2b8a9a86ff265102fcf943aac7dd2b8b19bc6b15286968bad391b77a8a5. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:54Z), 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/QZMEN2258932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe853d7fa9e0b018453b1d2abca665470f1f2078348ac2f42a3e480dfdeb35a37. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFYZ2323446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc547ce4a5ff9f3bdef2ada56c702d76591f00819e4c6be6b4c15fd31d26f0907. 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/QZFYZ2323447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbb02bdd50557be5bd40feaf6b735a3e8c679f7f446fc440430986bd33fc548. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:23:26Z), 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/QZFYZ2323448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a08e6592ec73b9853c28ce0883df6e9c29d1abf343b8fea5eb378763134dcf. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:28Z), 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/QZNWZ2275556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782edec263fa5897c4df7c5e73d6d56642be4e9a5cb8eb537ed2a94050488bcc. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZFYZ2323449.