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 0xf8f583e70467f98fd7fc60e56ac860cc5607cde54452e70f012ec39008d6a835. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b1be339-0a14-460c-b813-6b2e8ed379a7.json and https://artists.proofprofile.net/proofs/artist/7b1be339-0a14-460c-b813-6b2e8ed379a7.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 0x03c9ac0d0f9a4986b3b649961688e1462a39efff7a8a4e21592548cc331d5e54. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFF2398743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50d931724ad91cd4e2ccc7e661b76de09d8882bc570e41b3ec934dad8f2e8c7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZWFP2436377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c60c29ddc8b8670983db9975eb5386912e46cfb121bf37a34a359a3156422fa. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:28:50Z), 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/QT3EZ2448580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f7855db819ff2b3d838b6dd7256be6b776212563fce7b8e690e67459011657. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:12:06Z), 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/QZHN82554862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ba046174dc235ceb2e696cc38303ea4114edc411bf591f6d012b06c99df88b. 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/QZHN82554865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cae59cb443cf278770ebeba12debc07db6cf5816e4ffdccde866035043ef621. 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/QZHN82554868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aef3533b521cf827bbbc0e9732839b95aad872ca1038c488e0632d44487c07. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:30Z), 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/QZK6G2535816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0194aefb6c975e36ae1a8468666b2885148ee85cef61fb7bf6c2caa65bd41f4. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:29:49Z), 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/QZNWX2579775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf50cc0e6a99de35f579d6232e84bb70dbf305c41f5dc9b73449a37e83f1129. 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/QZPLS2578462.