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 0x146bee47e4bc7c46e87f64d2244f8641116026c4cab52ddc9b80edbdf476da8e. 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/e6056cfb-accc-4140-a05a-e205cb53b85f.json and https://artists.proofprofile.net/proofs/artist/e6056cfb-accc-4140-a05a-e205cb53b85f.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 0x610434d966ed894440f4be9bbd84ddc214045786b613863f1f55a5b6dc998fe7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFZ42269094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302847ef1029ed415770e3863fce2ea14b4005777e9ead2995f871d1bebb772e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ62213229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a53c7e3baac309bac90b646754b35c208cad152edcb4d70b959d86024ca9e44. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ62213239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b02c6d246b736fc7ca5f319cb44966ded306dc1ce13a1db188ceeab80ec6723. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ62213242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e445d9f75ccdd5911e8659d0dfdc6bb784aee25e9168699119a59e562853ba. 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/QZHNB2283975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e8bf5c3e27ff7ff85d61f689d113d8e19d590eaee5cf07842f9e303ee7f9b0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:28:02Z), 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/QZTB92280924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484b89b104000b456ff24823e2d829ba8a2043c6d92c5ec0b69aa89fb82528c3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:57:19Z), 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/QZTB92280926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b3e1d313b2cdfe1dae82b76deae60fb9f0203fd5c97126c963b5b8f96bdebd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB92280928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86289dc981d0f341184bbc939d8112357f6d695370ffa748c78fd19f8d498d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6L2393693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3245c7d801e4ba74ccd27842a3ad6392a041d2be3458284f6770bee389db58b5. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZK6L2393696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ecc80a269caca7ed18cb11dd838d2edbd6fa28403714b41bbdc89ea82b6cc4. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZK6L2393697.