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 0x8988cd145e7afd55699068b39b82bd15f5d450f73325baa35677d9fdda7ced6c. 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/581f9f5b-3677-4bcc-877b-3f4bff515350.json and https://artists.proofprofile.net/proofs/artist/581f9f5b-3677-4bcc-877b-3f4bff515350.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 0xb3190ffc43a9965e7a552bad6ec546902fc0505837c2a3f42a2593b4a68ed43f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7Q2557423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0865363563662db6e8804d9e00bdd3984b5c20e2a393d5be0ba7eee9a11030. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7R2508130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61166b0bb72336135df7a2f88dd2bc4b757c957e428e60f22bd7bed03a6340c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:18:40Z), 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/QZZ7R2508101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681bc74bf61e02e55ca12f444990cff6aff6ccbfb725fdd9bdcee5cbc0bc61f6. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:34:37Z), 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/QZZ7Q2572999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53ae8ab64e4c838db0041f30ffa4248bb606b4e626a9d40d46b96c9be7f16d5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZZ7R2508129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854ba7345b2cc58985490a3f1db5ddce5357e67aa484b9b91e53c52f697d0b65. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ7Q2575198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530f3515089a2f96a8bb9f00a35347758891d2264b5923ecd1621e4cdd2d97bb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7R2508124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bfbe1b6d46816744549f59bacd0c5aace0dc0c0f2685a4452ccc1defeeec54. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZZ7R2545893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a3e4e122421fbee9c7206360e3e0d2b8ab4fcfb3b647a250c3a8b6036d53dc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:45Z), 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/QZZ7R2545895.