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 0x619af12726950beec96fb46dde064635d939ecf8868f3680514ed3c85d43956e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da94f364-cf71-4786-9785-f241b23450fd.json and https://artists.proofprofile.net/proofs/artist/da94f364-cf71-4786-9785-f241b23450fd.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 0x62d16d05b179b6d2861767e043609ac5031c8c0315418bef16e4050c28a1ab74. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJH2569336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dca1d1e9020ae603f40247ff89a5bfe08d2ac759ec32677d8f38dd8b4b1eaf. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:25:43Z), 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/TCAJH2569344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cc210535d715d7b7c5b8151d40480a25c7c4df0852e596cc2a5558b20ba882. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:37:42Z), 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/TCAJH2569348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381d6a50f73d7f4c2167336d1719a01898dfadc6be0ffaefa686612b1f06f134. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJH2569352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfff3d5ae6ead35ec199f56eb258e286e9b2ad7d2f7047f1bc6ad1876f3a271d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJH2569361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a99f0ceeecee49ac737a5503190512086b261c0d2b466f5d920b4c1ccc9ee3e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJH2569404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c58e28343eaebd3ea34c7502e121d675cf5c64785e37a9491f90bf6a373db77. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJH2577600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ae0fcf769dcb91514fdb4ee20a35d2bffb7004d4b35eefcec8a5a58b648b81. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJH2577628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe092cb9cb09097bb63205217e435993c49a4edbe2ae07204b19cea0343b55b2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJH2577645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7952a716a6efb3ac49d0d267baf5d35f407b2616c18d7f57401c1d596d1e41cc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJH2577668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec99a2c0eb9167bea1fa54aa4658f07d26c839c1e6293056f8ac11da9bfd15b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:57Z), 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/TCAJH2577676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcede10b44c53fe4c2e783a5cb2f6ba76b75cadb36d2e0681a8dacd7230473e8f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAJH2577683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2d32ed822f11a24be554a9dcf199c168073d449dc7608eef7c089e61e5c530. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:22Z), 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/TCAJH2577688.