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 0xdffc2332eb6bba0da84004e0c1bcb60b0f005952c406181e34cb3085478b1e5f. 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/082dc995-4389-43eb-8876-2aa15b66ee48.json and https://artists.proofprofile.net/proofs/artist/082dc995-4389-43eb-8876-2aa15b66ee48.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 0x8a94f39bb7ad45ee9c63db4b557c9d4666a8fb534c83f0b184f270821d7768e2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZEQU2059131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488a50b175f86bc9756ca0a173887b62b0c58af61a86a0d7a7ed9d4736bb6069. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZEQU2059159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4eb80f4220c312d5611f23e0d73725e4283645e7815c6e6f16afdf51c57de0. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZEQU2059161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3fb83a6e1a2a9776a7cf2d3c1ace6c1ba0bc6e7a9a51cd175b54950d4f3eea. 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/QZEQU2059167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ae23916e01b6b859b21494a9aab1719691dffec7b42483606690ec0982cbfb. 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/QZEQU2059171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc8db6b2add33c9d5acda8612c90bf7a9ac80234a2122aac4efdeeefdece478. 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/QZEQU2059179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ae7234103adacb9248eb23ad183a280027b6cfa222609260f7385e01f7c776. 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/BRTGM0900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd09fc09f76e0df1a051bf7e8738fd1a679fa074008aca0bd059d6eca8ed6ae. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:02:41Z), 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/BRTGM0900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e958f12475b1642fb2cf737d2f90ab4b63998d788f1843d3bd1994eb15bf76a. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/BRGCD1600344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a543486f023cc4d65dc3ab4a93bbc5d3cd3b9a2b0e077a121b8a498d8acdf46. 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/BRGCD1600345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597938912e2edaa379267ba6b98ea900ec5ef730cc66198d6259f9d0b84d3bce. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/BRGCD1600348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe615bca307832b72e767d89bab7476ea6abbf8e05716f84c85cde4dcd77259c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BRGCD1600350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087859c02034c8a9cc8f93dc2bcefcfb4a01cdeee49263c3a99abc55ef944657. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BRGCD1600353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d284a6910baa618a229aaafd2998df293448de8d8d008cd18e7c7fe770f0937. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/QZGLS2129322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa43338261635b40cca2797f71f26876466d33b33ff96420bd33864ceb88c6a8. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZGLS2129324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a494dd366a1d717e017a4d300d4bd39fe03a4f77e99f5b95c712683e15656fe. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZGLS2153647.