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 0xbfa08a26d119b63ee8bbb2444edd4894445e1518da4607a3ed5a3e69fbb97093. 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/2dcc5441-40c6-43dc-b87b-b892d1b277ef.json and https://artists.proofprofile.net/proofs/artist/2dcc5441-40c6-43dc-b87b-b892d1b277ef.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 0x6500bfdaf869b68a03f65818d4407b990aad62bf9fa826f57852885723ddf2a7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAEX2015398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0717f3e9594b488e25d6200bb34dffe9a63fa8802fb0a47a864fdd3d343b8d. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/DGA072118448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0f7c0fb368fb9a2673b9ad28f31ec587a1e2dccd5453a3df9c6a2936af89e8. 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/DGA072118647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e73b198c0e94f5aa6c11408b8eab7fe8e4f9c28f599f4e98d35629a88f796ac. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/FR59R2131160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c636b78a165106bd07822d376dc676367e14a79a1bdca64f8eea885b9e867d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR96X2197442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc58cfd0c79532216b99f6618bc29e8c00f26a34b9b4d97d72dae392add677a. 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/FR96X2197441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c75faf62b6b3ef7f3165ab7a44a66a045ff8d8353637e500bdd78a3b8cfc0e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRX202129343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bbbbbcd3730c6e8e78d5441e1490bc3e7fdaed776f94337d1b7b2ea14ba4e1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:22:33Z), 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/FRX282170618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155712ed936ab6f0f2de44cbf80abc5eacac05d711f9443e776b0854adde85ce. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:28Z), 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/FRS182123762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d92780b7324d7957c886623332bfc8c653de293506e6acbdefd4b5f8cdb02ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR10S2265605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f8748af901ca56cddfdde203d4fc288123b5f2292290d428a1e13b9f2e5456. 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/FR96X2215574.