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 0x98564ee2a2c5b8fbd2f936ca040969eb3f567f26c988aeb591d9ab5028d4b767. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a45475dc-af30-456d-8914-017287c563cf.json and https://artists.proofprofile.net/proofs/artist/a45475dc-af30-456d-8914-017287c563cf.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 0xc7b98d98a555896266c609d6f3cda4da7394c2e0be32edf4abfebb6f8cd3bbd7. 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/QZK6M2247568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b9ea09efb13e4065d7edc9bc8d3372d618c20210d0986d0c340a5b12dc7ca9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZK6M2246277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dd867b512472449a53b84b8eb67da4ad342fb96fba990a812f91e290d0cd31. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:16Z), 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/QZK6M2247887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d79198e05d8a5a2b17a62ae4bab5041cb1a9ea5753921cbf48fa1019aadf1e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:53:08Z), 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/QZK6M2273969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda353ff0d47480b6378051e84b27a6ce3c764d7dd221104c7f2e855f81075d94. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZK6M2273968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71af7daf66348ed7adbf8b914c1b2ab0237d136119a706ebc275125be656bb76. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWS2203788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c55648aa1012eac386f10a8366098ede5630b6d18a7af40971599c444dd15d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:49:18Z), 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/QZHNB2320239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee42dad376d5a7b49d9ac6adbe84cae9a13cc4a2034a5f77d31f5b48d34f1a30. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:37Z), 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/QZTB62323638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f075d8fcd7b20bf42d7aed0d4cd41225f710fb594773b698154048f6b1aa140. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:12:49Z), 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/QZWFH2375207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbfb2b486a7f9a329453cefe3b225be04172f55211ff0cf36e438c8f019d3b6. 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/QZFZ32432323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec553ccee89c2c0c01ed0893dc8586674b2fe50b2238df012621169e7093091. 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/QZDA42454330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc423f59d3d7e0404b1fc21345479241351ef0d9c3e721f8c16d87816ec557c8. 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/QZMEN2468892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f884bf1a5a755394376500ee33cb491cc75c1fd74085f8e2b464860a5f83b23. 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/QZZ7M2449271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2defa6e2cf952ac7f62fd624e99ea730cc8f411c5dcb0698c6283d53b8e31f09. 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/QZES92520386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c6b0d3053d62108cd2a7162b035c92a76ca2031ee5341a3e44d7548b60014c. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:25Z), 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/QZNWS2567295.