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 0x990977bd9810020525536d5974d70099c7327e879500ab271f32d55fb6dd6cfe. 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/1d84f42c-862e-466f-862f-e78217ebda13.json and https://artists.proofprofile.net/proofs/artist/1d84f42c-862e-466f-862f-e78217ebda13.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 0xb66b217468d1314cf45c5f35e5bb577a379fc784d916b9391034f7132724a5f7. 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/QZSYP2382289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a51674c5ae1300bf4d1a52c8396838b04057795b60f1a50787a938c6bdcbc6e. 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/QZMHK2211818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0623d6ed849c9a17372ae28108cca93443bc51d15ab9f7645b39fd4306357815. 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/QZS7J2379575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d30eca5bb18929b1d2d34b958e239cbdb2f6ba3dc85626f5bc0c0b2af69d999. 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/QZS7J2360522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dd4e54eb6758db343f4d48bebfc2d857c50184aa5e859cfdbe6a14edab2c79. 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/QZMHP2028196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846c066e3a5c1305f55c1ed9ddcb2de95b79b4d3c51caf73ffe9fbe150a251ed. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:31:13Z), 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/QZMHP2047656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80aac7bb1a300f14f872d0b4beac821f0455dd35dbfe1644b631f87056f95b2f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZS7J2382104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623b1b2f5789451003ae3beaffc9c4c287ab67133301be82e0d0bfe6fa2476ad. 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/QZS7J2333168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59354c8f0b19b18129b25cbc8c2661d336f95cd39204bfd7b1aee57e37fe70e1. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZS7J2362167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e91d41a85bb165239be8ef11a6bdfd75c1f2070fb832935df0df3fcb169100. 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/QZS7J2355220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c3603b85f356f451d9e7a65d958743ad50f89996a471b73a2887bcf2c6242. 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/QZS7J2393922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee14ad5bffde461e9d93fd000b2059a4d08a2902e9f657f7ef4bcb7e86b5ae7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZS7J2398093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad834610d7f7f875e9e6be733940b87a5d79faada19dcc4fd8b8d56ccc241158. 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/QZQAY2357402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833fd2707fe09e280e36e247288f8694e14a2da2531e52a69e07f8f3d4e249a7. 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/QZTL92346166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ff68e5ece077d302f40f31f0cb4a2b66ac572627ed2d71339707bdfae36548. 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/QZSYP2209434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fe869ab600764843ea9ed5bc97b2a55ad4c99a2c5cbbb2a656f14fd906cea1. 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/QZSYP2264494.
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