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 0x45b4046d502e722e6892f8b9beb641316d2df8051bf28247cd4364bd58edef7c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc4bb216-7eb7-4a00-b4e5-edc42bb23527.json and https://artists.proofprofile.net/proofs/artist/dc4bb216-7eb7-4a00-b4e5-edc42bb23527.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 0x1632142d2668a8fea6afe6f2d62e9ae681984c1deac5a1a3abef7698dd830456. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:37:50Z), 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/US7VG1809837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9ec0fca3d5d75d13febdf2d44852e93bf419fde651d121967a9f6e01dc15d7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/US7VG1809843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232bfebc9abef0827a57c70caac066ef3faed0eb5a011e72d8d3f9a44ec76129. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB1945503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65f4dc7779788a6f3c417027877922849154f16170d6571f950c24b372e46da. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ5AB1945504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7c51ca634a59a7aa21939663a0201f72c5d4b61a7dd0121a0d5ff405e2a440. 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/QZ5AB1945510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e63d43ac9ddd16d7c15b3a2d15ecd1ad43cbd3eeeb0c5eedabbafef275dbef. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:59:10Z), 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/US7VG1810011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63be5c7058fded0d748c8ad171ba6831c7f676c929c215ccc268b723e05a4191. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:25Z), 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/QZGLS1940710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa799dfaaff37412a8893ea6dde51b98c4f40829cf0c499c3f26be2440f51793d. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:19:35Z), 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/QZGLS1940711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0323a917cdc329829b4670135d95422746b30386df907b2bfefbbc6604304a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZNJW2063819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf60de7cc11cf02465c1f768cfc8dc7add709262b0f6e4392e287aa9aa7010b3. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNJW2063822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53357655e0c6cd5d835333c8100d0d6c9cc2f854227bfcd910bcc5f9edf7538d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZNJW2063824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f40cae582d21365522925beb4bf77c980c7a01e4e2f271524f5301660880664. 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/USA2P2121876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7136a24cef67d2aa39a8ccd1d501c03bbf42fdaf43180eb814b200b6ba2aaf3c. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USA2P2149741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9995b2399c63eaa866a71ae6d5666a9eac6ca5f27c9ecd74b37f22bce3d05ce7. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:20:28Z), 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/USA2P2149745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea1e88914276057260387d6de22e185c2df218020393feed28382aae12c4610. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USA2P2151728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaaf54f72f6c8b817fb9b86c8f6c87e67259e30150f0ad3612d81a8c127f368. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZN882257881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711ed872a8c79c90093c596937e830a244c498597e9639a3b496fdbcaf8fd515. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:20:19Z), 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/TCAJJ2569266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a99a4b7369a1d99fc489695b93e534e06ef2d66c8693bf3245e9d7d5d06436. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJQ2504129.