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 0x35f3709e7b0d15720f4d110ce9a001b95ccf45b0803b6d61332070071497fe8d. 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/2c686543-0404-417a-9b50-6bc219ff6492.json and https://artists.proofprofile.net/proofs/artist/2c686543-0404-417a-9b50-6bc219ff6492.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 0x59f866de47b2d337b588fe0571fbf032236628c4d01ed8beed940d763d88e83a. 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/ZAQ652100541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d139f524f4d27ee08f2344d444111980132ae9ff9b87bc42eb97e1e09035066. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZAQ652100542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53416af9013bcba75d2576bf51b3ddd8c4caa126a06f0a2e98da2807b03288d8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ZAQ652100543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b26ea53e1226fcaa12b48cb107bbdbfbbe4ce5694dbc2bbcef01dbc26f33fa6. 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/ZAQ652100544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294aabe520abbf59443e7080cd531426fec1bc1d54b5eb752027dcbfa17a276a. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/ZAWL61900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5f04a9f395d8761fcdc3bd5cc435dd32d5f050d30ac1a0855587e4ffca7ffc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:01Z), 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/ZA56E2101094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33e65cc5219cce5e206fb2285ba8e05e41c4182c43fb4ad9e04fb8d090c3c6a. 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/ZA56E2101095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21efed519dc4c10fc7d0e642897ebcf3781bc9f3b31156118febab4bd733bd74. 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/ZA56E2101098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8058e283d5ef1fa59c6f34c3b1923e9a2e54616611679df0b1c0fd75b27225d3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ZA56E2101099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0781d50a34cf186779ec0264b5682c88864984355e0d79465ef4f79093a445a8. 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/ZA56E2101100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f78c265f95c775e998b40541c0c6a8a964df8fd4422957ffbd1b56f3d9424a. 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/ZA56E2101101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e81cafab09a53dff941b1aa7515ea456ce5f32b1c9a5d48f529068d2f330d8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ZA56E2101102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309929e12d7e9b6a0b7fe604cfa4a5b619b2663e5c8286c642dfb68e48af3a95. 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/ZA56E2101104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75424401de0c4b455f63ee44bcc439523863aca258fd64818c8c0a5c8e9be84d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA4PM2401605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a8737574217715fd10c4c9518471672a495db7d77d75bf9c1048a2dcf2cf22. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAUM72400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b81746ede4d28cbb5a705448617f0fa05b95216d31c7d8447e2748806f9cdf2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZB8CX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b81746ede4d28cbb5a705448617f0fa05b95216d31c7d8447e2748806f9cdf2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZB8CX2400001.