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 0x6c73650d75731c39b2ba16165e4d635795f9422829675a16a21c9d39d2631d99. 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/19492a1d-5d12-41bb-a7be-1c80d6ffbc98.json and https://artists.proofprofile.net/proofs/artist/19492a1d-5d12-41bb-a7be-1c80d6ffbc98.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 0xd35f3ba91e4c2f6f87af445a5de8f0aad1ba850aeea00c9235b6ee1b18656e0c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMZ92046372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9369204b997c537636374471c14839ec7caf89780da0f82ad2116a171cb402. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLM2107941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa25638cb71a948876a40802fa369e769e187701a0309f6b5a68e67a8afdf2a. 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/QZNJY2172609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e003307e3bb3fce1894763d0d71b691b8f9c239cc3b504e96c7acacc8895a87. 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/QMFME2093099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd161238f0be73baa0f6de3b5bee2aa90ad35c36fee3ee3967f49bebc0f8c1a. 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/QZTPX2114697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf878e906a6b3a876f037611472a8ecc3a3b8444994696ecd68f2689e43aa65cb. 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/QM7281909535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b8845ca81dd1e08446a8c9251f01770b9565126bba79ad5769589aa08121cf. 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/QM4TX1833634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a6a08dc518a574bddc648914df7b2aa109da768ac914fa78c50930897773e1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM4TX2385387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291a5b347f8ac3699326f82b57f8b96591fadbc162d11153a944d5da42ea4b82. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ52046710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ee446b29a9c78efa0bdb9d0dc5d15f3d85b01cb785bb05d58493a0ea7ab433. 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/QZYFZ2479304.
LOS NIKE (with Seikan Anikila, El Chulo) - REMIX
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748730d89f4b3ff75fc2bcbac0840fe35a77de26515a721a9a41bc859c7cccd7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZYFZ2479306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fab303fa81a6661ce7e69d78f9d5ff55f1b737b66fb8ccec1170b1afa4c5d8a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB2451213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc045be97ba57f382b5012530f1a205f320ee0a78734fdca03e4614a690ed598e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2426646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64033e4f5e49b51ec07f6494ac76fcebea1e5ad3e81ea4224474d15870f46959. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJV2389633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a6617621f5dd6fdd23b89988d1ae4e1947a5a23fe978c058f3115441b59160. 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/QZEZZ1900976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ffacd65ffbbdeb5e586460675e5bd6f012cf2936968dc77282ce292198b433. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZEZZ2000808.