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 0xb8bfe331e372b3340a614019658b2ef5f5e53b3cff15d2f3e98c822a7f362d64. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e148347-ad33-43f8-bdf6-eda833876a48.json and https://artists.proofprofile.net/proofs/artist/6e148347-ad33-43f8-bdf6-eda833876a48.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 0x97b212238ca3baa0ba3b0238541cca5c7643564c8998362a9a9183b7738df9e1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6HN1987016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae89705c2a45fcc9f51bfe354d49ae9f43f710dabccf8882373a6f4d8b5c7bf. 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/SE6HN1987017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09c5d1d0e61f33091d7c330f71fcce9ed7a9d62efa3954cf11c152a05452a10. 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/SE6HN1987019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b757ddfdc2d3f2afd24ac572347f255e461f243f503bd1b88275bbfa2ffdc7b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:25:07Z), 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/SE5BU2065966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe2f43d9a1527b821766bfcb37861a5d123407fdcf11ef35aa140f4a97d70ed. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:30Z), 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/SE5BU2055386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4f27031871fe75a8ef9ca36531980afd972d4db1effb84e640e3bf578f189a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/SE6SA2016224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbe9d587f8cb7d4cfcc93a5b8c9a9b9c7426e0a4078e0b56671002ed8662ecf. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:11:10Z), 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/SE6A92188951.