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 0xaa24980ca2d657c72c9460a3a300fd9fc4ec52e3a3ba4d963a8a24ab2a67b7dd. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cffb69f-79c1-47c0-83cd-0510c201dc93.json and https://artists.proofprofile.net/proofs/artist/2cffb69f-79c1-47c0-83cd-0510c201dc93.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 0x9d872fb413ec49f971c91d441d0f0ff6ccc321f9518627b3e1b87a2e9274891f. 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/GXBAV2543938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab6bc1e17c91aec879797911e1c394afe138b26d283a7450b61a6f5e9ddde1e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:26:02Z), 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/GXBAV2504685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36da9a1bef5246ca4cde92501df53ff532295b6f7cfba4e44ede6da06fb589de. 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/GXBAV2536869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa445312c411521ebf8933534216a05ba608f73f1579b203aac17cb24218be4c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GXBAV2577889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d2f408137351a489556c7adc484b2b9b4a17decafc39db1a2462f79453501a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:04Z), 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/GXD7V2598379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53db6ca346478eb2ad2979af7bcd65979fd79ac0e6fa977b522b61210eca591f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:53Z), 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/GXD7V2557837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd64c703fc604023ec99fb2c1a943ed1bf662f67d7b7bc8807f716caa530b8f. 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/GXBAV2518663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67402d260a5467986329b50720dd3976c3a5e6e5d40ce34ff964fae35ad6289d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GXBAV2559726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd089f237a4fb81c9c655f61f548056fc97895d4b6a83dfd17fc5efc0b8689c7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GXBAV2530597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274b9deff3bf7010d06fee704a08db53359c35886c10e71b600e9c14b73c7100. 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/GXBAV2594842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7bfd7929b401ade892208df2ba2686ed1e973f50f28370701c154ce2916c22. 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/GXBAV2512813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dcc70b778a5ba3c61825c5b43332521e4b0a62c71340245a8a6cf727c07ffa. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:17Z), 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/GXD7V2504887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094d4f0ad82b59a781ad04320091f8581924c5376573cf007fd4079f68075321. 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/GXD7V2515503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c13229860388943ff7ebdc60c89982e26523ef85496b098a683311fb1255878. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/AEA3A2153571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e6492cfa2cdfa52c5688b650eba1bf74f34273d24221973df8df8bdbec9e32. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:23:59Z), 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/GXBAV2126252.