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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66779b673397c660eb0194ba834eabd81a650efaeac4dccc6448ae3d80924d8. 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/5ed25438-6201-4baa-8ba9-6d98d0bf60a7.json and https://artists.proofprofile.net/proofs/artist/5ed25438-6201-4baa-8ba9-6d98d0bf60a7.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959354a422936ddd83a0b1aa506e2b955680ae8c706f3b37f611a1d1595abd23. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM42K1978507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c055dac46254783d96c406d11a5ef03984ddd2b7381983a1dc830f19b0c88fa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PT8KG1700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f08db66008a2b61d11980d08bd2fe4e20cb07a479a4f1bf7bd3fcb916fbac4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB52350355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6713083bd74385939c7a2537ca79dbce97e5da4fd25dd7e8cfcce5589ee118bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB52350356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbff4b3b0ad7c04f69aae0e76cb83dcacd89b0cfe0bdad2d119d95e1d8def70f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWS2377945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7d102adc3dadd9125fadb6019d4e6e5a00b070cc41bc51712f4394346e00f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWS2377946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4559a7f2c057126df3a295fe98954433e8d84bbf9bcd413410c08f3f8309977f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWS2377947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe991247ca445703c352c2c66c2a628e08ba10ce4cf766328ae58db8b1f9eb651. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWS2377948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01463ab30c2d33f03717ee0b6404d8dcfe3c215e415ccdb4ac8a968cf37e2b0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:04:57Z), 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/QZHNC2371841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13d54c696f2a71fddf04251e8eaf89b597be55d2e9fe83378f206b45216e592. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:27:00Z), 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/QZES82323145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e09841d1bda1fff5138174278c91760d583ee4acbc6edbd510586d44040b5f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZRP42285956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf459039891bde7398007fd7ce343aabc0219c786066ec79dcf880464e4adfbc4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZD2225350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ca4c9b846814700fc3ad239f93724b962bc1e631a74a6c200c663705d23888. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6N2269014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d842df040c7787b249a0ea6485c8cb1f097977dabb0e562558d02ee037f098. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAT2115521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcd484d3b4fd1ef25ffb22b5bb81a1a37063637b59b28b0c2b1654dc465ca2e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX202180655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacff4dbfb22291d77eb79d43c788924bc61cec208b52da08353da9301d74360. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZH5E1985851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65bca40797aff5f53e60eb4f0bf0ab9aa17d8b4b8d742a3458b1d856cdbe8b9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6L2061372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26600227c003d622e32906d98ce3484cc11d00d8bbefad39891bd214e2e9af88. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZKDK2099152.