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 0xdc82d049837b3aa52bbb45e678b1e17a441c45d1fa25ccb3aa3ce95ccb8448ed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/644b108d-c306-4ac4-8a9e-3067d8c91402.json and https://artists.proofprofile.net/proofs/artist/644b108d-c306-4ac4-8a9e-3067d8c91402.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 0x612318ac2ebdb411c90bac240281a7db23415119f1bc915098e98bc8b894c29e. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN62142388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c31232b0cc2cd9c8bd759463eab1278cc0354c7cae5fdb621ea36b477744fe. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZK6H2102038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e940436a9b5421a81e276b3ff8dc174de682a8701f5677dff610678db6ecef. 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/QZHNC2286012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4db1b3cd77e12fb4176bb12e23d3536ac36be5222ecfb808e7cd1d4443fbc82. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:08:47Z), 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/QZK6N2276894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f0ffeb91c38cb1680d1831df9bcf4c4d10e38481dcb771b66746eafe507478. 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/QZK6H2285847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609732b6774168cf0fa5faec39bcee138ce2c1a72425dada5e4499c7111f470f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:35Z), 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/QZTBB2242603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93485b9e3d5976cc73094b8d255f39994145058d3cdde729065bd7c82c5e83b8. 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/QZHN32338257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65ed53f5b30610c3ca9fffab380e65174dcad9622a14138cab381b82daf8583. 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/QZHN32335124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb84881ae3ff614082cb1bef5281d505ef8fa567bf0f624f86b566cbc7a02bbe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWV2291876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb84881ae3ff614082cb1bef5281d505ef8fa567bf0f624f86b566cbc7a02bbe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWV2291876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7b304464ba21d839a5ffe8c3196361a6d3921e3cdd50e39464b5df97fb8efc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYZ2220590.