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 0x711489e0595410e8662915a445965d657842b157a472d0a3570c47aedcb48362. 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/71988b75-e25c-4783-9e01-221553b6a230.json and https://artists.proofprofile.net/proofs/artist/71988b75-e25c-4783-9e01-221553b6a230.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 0x8d03efb5b27c0ed29c84a238f64e8131c83d429e7efbb80fcbe5cd863573df67. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:04Z), 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/QZTB92331597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2971f65549629c54e1b6fc0ebb77d95682d5f6a9d1baad982fc844c72d2e8458. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:42Z), 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/QZTBE2486609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadae39e62ddf55042a8f078e07ce390a9d9ed909f255275abab1f5f1e8a1a54c. 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/QZFZ42549159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd632743425bfa625f9568eaea83990362a095c8502ca9fff4bfc3d7847fc010c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZDA52542331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a969482937adef97a29198d0b031b747943c1bea46fa830504776036b9d7d4. 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/QZDA52526180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91bcb335838a656ff3110327be8f7f40254c1126ff140e84d17e925ccc8400e. 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/QZDA52580435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf0d9a5e6998fee35e905c87a1dc965e3a1f185d1631b77c93e89be271169d2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:56Z), 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/QZDA62599191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4f926cac608d90c93e61e5c4c010d25c97fd94d5e0aa4376bb4e34257f1fec. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:14Z), 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/QZK6Q2546020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160b3b2d79c3e33bce487d4706633731f0c1474c715bca6c3479f0bab64a3005. 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/QZK6L2561417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44577f35ed56dc48b4c79e74998f90bd0ddc3cb6802bad61340bf643f43b99e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:17:53Z), 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/QZNWX2539734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141f012175615a33a25720bd44970ef22c6e7a98f31d6464fd15e3fd258d7f1d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAW2536857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9a81b93fd6ab8caf38c10adc3d435147b60553a88de3f383b18db0f04021f1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFE2527082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd0204b992e8b837f32ac53e18c400aa29498c56b147c3a72804cfc0261c110. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZZ7Q2590774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaad42afb582273bae4c890a9b8bf3dbdb1c35316f7d3421ee7e0a853b36d9f. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QT3FA2591294.