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 0x4a71239e0257119c11904eb9ca9bdb60728d3b22cbe0f1577706140513a78784. 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/163547d4-d50e-404c-9e1a-88caed40967a.json and https://artists.proofprofile.net/proofs/artist/163547d4-d50e-404c-9e1a-88caed40967a.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 0xc7d53cfa94333cb4188477b6a54405664edd5f8bcdc53fb3bd8c4e2e2cec2281. 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/CAHQJ2592440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ffe5d340a73d386098560c991b277c541536eba71365517d78f8295d85678d. 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/CACWV2507141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023b2c958117ccbc6ee51289661edc33300b1ea77f84de7a58467eec46996bc2. 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/CACWV2507144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f31067b7c3ac735bb46ca0698680078452b7648462fd7b81ca7ae5283d7b40. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CACWV2507143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea178a7d593d252607c8c46cc050b6cd8f64ceeff70c722c382cf8fa0cdb6f1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CACWV2507140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a3f36d905d7f5290473c6e8d1933d2c0da9ee555b517f0de765273d8f91cfd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CACWV2514814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513d67a8de6a7dea61f06fee67256284e73e99ea8ead31bf49fc47abb609793e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CACWV2514981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227bc512d2a173f9aaf99ef6ae491dcfceeadbbd86626fb064922e978e6ba671. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CACWV2514810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc24e8870b5205909a963a21186359f0ca07459829199093443da75021f150d5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:18Z), 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/CACWV2514971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1343615dfc08589015e57a1541e868512dae9679f5563f13e6d3114355776418. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CACWV2514886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8ec972010996314be3aed399c99634549edbd505cc16e6887af9df4aac1f03. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:31Z), 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/CACWV2517628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405af307d5ec21f46147e9657146f8bacd61d3ad3f1f543d7ff2ae889d5d9394. 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/CACWV2517502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd704bd75c8148a6fac5c0174fb696ce1eb58eec6dd6d1c11e8be9efde073cf. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/CACWV2517576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8afab58bade398933bf1c48510f3353b2075b64e93c41f7429b05791f00b84. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:33Z), 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/CACWV2518863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba29d48f07b9eacfe867812db4d59556266922fb678c36d8062534004073a0f. 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/CACWV2518848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb681aa6c8576e4507d8fd633db6ecfeb85dad391a05d391ee8795cbdbec607. 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/CACWV2518862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400c4cbfedbc034be6c6a4337fa88f5080aa8a8255128df919cde3a914e5da24. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CACWV2517507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fb9bcff879407174d4bdb1374de6af21d01c570c4c1b0d13f8b3efa006120a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CACWV2518849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7866fd5ab0357e8976a71241d35a14f5b1234a4fd4cdb9198bab4135b7551ced. 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/CACWV2517562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4a64a67b5c7934ea6d99e60478869d0b8387237e90e21fbfc2005ce8b4bba8. 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/CACWV2518861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f75e5354b63c34b3c7a92c22c93109b7f2724b87b156318af402e5386b2f1f6. 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/CACWV2521664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702036e25d3210eda7ba72fba496467fc90fa3ad1bf6f70b834f8fbf66554be3. 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/CACWV2521669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c2ebacc4adf00ea1034e9cdb384585f1a79d0c85487463a920a5003f0d4301. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CACWV2519945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c351dde15df2072c0384e6137549c224ad3448418ba804d4c08bdc1813da0d. 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/CACWV2519939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43f99af4f42763c2d0b49703fae82c84036a4a01f3f623da88908a1113ff030. 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/CACWV2520136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21444f9d4f9399fcac65c76b9b4f5d0ebbf29911e784e98ba7f0be688734b18. 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/CACWV2520053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace4161edb8484225c01f49c0e36c6df49cc7774d0d84178494638c4dc74c0f7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CACWV2521658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7018b93583f053638f8fdede6ba92600c50f69d1b9f689efbfa99716e0c54c97. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/CACWV2521671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375ba42a1b63eb6009504c7592152227e13aaec2f29e1baaa940d01c052e8df8. 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/CACWV2521674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679825480501280ef098a6e4ac1ab6efc61a3c19b00695d9e516282530516335. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CACWV2519940.