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 0x7b6506a98503384176e54fde9980e0381c67073216db0896774009f204d486ac. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d23f9738-48cf-47c8-a2c6-0d2320cc8d97.json and https://artists.proofprofile.net/proofs/artist/d23f9738-48cf-47c8-a2c6-0d2320cc8d97.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 0xfe6fcd873a837c42d0e2857f44a9eae31616959a2759853284e91ec7a8ba29d0. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZTBA2208767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b561452b9662accdcabc04f84c07e3270f6af7dcbb13a247311e30d64ad05. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA72374091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94797507f08319bf7aaa69d0f7554ce83a3348edd619cd2ee27e7e656cc6a2c6. 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/QZHN72349233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aa1b4ad0da11722241567df37562cfe604a3ab08c7a9214b4e1178308074d0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6Q2320958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb54b48699531809f7a0f061d0e40f2a98c7b8e90fef157234beb14d516c14d. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZNWQ2350442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db64bbb099680759987fe9f0ff464657619a224b95ab24d1ff1c01b7524adc9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTB42342263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc5594ca4896baf77ac526216a19624e90a7f03c0ddb3a31a2939fd681fc661. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBC2345578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64503626a2a70edf475fc9f282339e920629109290d95d5fcba7167a7b088ca2. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZWFK2363173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77236d5cc44b1c21a79a1978bb2009b3d6c6b7c119be4bae750ab5c9dd1fc47. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZWFK2363172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879dda9a84baa320c07fd3cb55022849e02345e8aa7042bd6b346303babfb194. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZK6N2414861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40eb5330d56d962f58c330e24fc5441b5270f896edd80abe0cd2768bca02308. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZZ7P2595813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8934822a329e60cb98a4a8208c48e2838ab333d8dd03fe5069481113be967d3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:29:26Z), 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/QZZ7P2595768.