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 0xd1a784d92f421dca20a54d9cc5cdde855c2251dc68f8c557a0d6ab6291b7ec5c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92f683ad-722e-4cf1-9811-0fed45274952.json and https://artists.proofprofile.net/proofs/artist/92f683ad-722e-4cf1-9811-0fed45274952.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 0x4ef04338581cb1ec50650a684deb422d8c7032f92a70ab62d5b3a14c83f606a1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZA4YC2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b91db48228999a7b7d276aae24aa212ea1b8e0c19e9e8b5f6222daabd93cfa. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZBL5J2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ee09495b41c5c2ff265ebb83c9705a826c48150bcc650964b76a20797365c3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:35:07Z), 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/ZBL5J2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bda21f7240166f9dd43be16e16ff3650211148f780597569c7165f3f8705b0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZBL5J2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d2b8f348ce218f98ee58efffcd785cc55886e601d11e400018b0514f2f7b9f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:08Z), 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/ZBL5J2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabacb3b3b289a7c8dda16ad2a58c35cc8cc0b4f274a69a6ec0d20cff7a8f9295. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ZBL5J2400011.