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 0xed804725b64729ebf0e382ad7b28cd0e3bf18996c108a910eddde5c86f65151f. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db2d1297-01dc-4940-acb5-3e13ed6d7d9d.json and https://artists.proofprofile.net/proofs/artist/db2d1297-01dc-4940-acb5-3e13ed6d7d9d.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 0xf9c4cc6ea85038a6bc01a9c75da5d5b3841775a40f62c4c50d66a77c9495900c. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:52:51Z), 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/TCABP1308994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4649f593eb11c559a10efdeef3cb1e5fdd9e7fe386586d566d20a7356a0e9ac8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:19:46Z), 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/TCAIX2480358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529d58c426b1fda721eeb2a070f8e73ed8641bc62f02a4dc60378264fe7f41a2. 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/TCAIX2480448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c0e41cc8219db22d3d46c0c4a6e4c8f506fb9f74be5dae7cf82e7a6554d7ca. 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/TCAIX2480535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d043a5d6f362e451ceb131a122728f69e7d08c8e61af484da8604d6fed3de2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:20Z), 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/TCAIX2480539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b91038a6fd9fe0cdc202004558c36fd1a8197f523c1f9f56bd45e9d33986438. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAIX2480548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0199c2532a8d75cdd38e3b1ffb1380ee04ed5949fe32235de880ba320348529b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAIX2480551.