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 0xf1091146622e44c5e12be3593ec22ffde50b380844cba475679b48f697375edc. 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/484d1d71-d17a-4f8e-a2fd-cbf3d6e68378.json and https://artists.proofprofile.net/proofs/artist/484d1d71-d17a-4f8e-a2fd-cbf3d6e68378.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 0x2b16dd9b37b354c14f4f683fed447b1e453ff6752fc583f7035a7a10570eb064. 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/CAU118603323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa787de431b4d462a1f9e81c60dc9ba007d711358bd4bd0917fe2107074e49d4c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:04:54Z), 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/CAU118603324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4213869f022093522c45b84ac6b35fe24240090a95b0aab092555a190f064af5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAU118603325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b31a321b113b35eada4f9d146578f65e16ff4103995a6c3977ff818a5c2e6a. 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/CAU118603326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2130b04a468ccfe39d4da62ab525ae2451c04928c702f960c8e0d4a83cd4b37e. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CAU118603327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf16094f55de916f06859c3f9a8fef43eb42157847d6af6ac95492c4f6a4c6a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CAU118703445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c95e8c4a4ea976bc174291a995bdeda449ebe4cf3640118b4d5b7774e4c293e. 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/CAU118703451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cc975701702c0d05efbb9dee83af4975668a3e8e75d39542ee89c9eda88ccb. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:00:05Z), 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/CAU119003456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc96465528a088b4979985f08bfacfe327dd97cfe0723342aab84748ec558f10. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:09:06Z), 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/CAU119003457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aad407b0699c722d4fa9a1b169a15b928d2d62c9837cb0562de412ef1e807f1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:14Z), 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/CAU119203472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3cefc752eebb4d0ea69af4d68633668b160e2b9217370f8b5001858665b836. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CAU118603320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9009f5a39abb1b0010b211f73e63d6d8e83d8912897cce16cc2e8ccab47437. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:36:50Z), 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/CAU118603321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e1e9142c9223ff2f38d159d58e9cb20078116b506e3f374180fa4f3081facc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:30Z), 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/CAU118703479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6244d13d7462a124c0c2995c1820b5b68971c8389502f9d838889ecc470e3c25. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CAU118703446.