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 0xb37b1d873ba2c6a307e1415d83ce9af92ef65b44f1c6c8e37ecdd9d278f438ac. 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/d802e6b6-2c93-4304-9b00-08da4062b3cd.json and https://artists.proofprofile.net/proofs/artist/d802e6b6-2c93-4304-9b00-08da4062b3cd.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 0x338746cc8efe1c61097dbaf20debaf7070eaa5ecb65599af177c534fb8d062f3. 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/GX8LE2492659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28aaaf20d3967ee0fb07532c42f73c8b9aa97a054508f969fdce28b8f57ae9de. 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/UK6822319367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee542d02d86b917f7f1a6c11d7a2e006229df744289567642b79d370cd3f76d3. 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/DGA0L2319797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116a3c38da85fd6976c31e35c75f3ac8fafb4d72e5806edf0f3863d60197a702. 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/DGA082353090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653ed0fef9bd8e21eb13a4def1fcbb743242274d8bb7c65020a6e51154a23dad. 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/DGA052349097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8794ad1d91d744c69ac4a315a9e47b6a63fc9137f49961fb8271329957dfb0. 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/FRX452359728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821258153f1f2096a6a40146a82f2730930f37214bf21f81a9ff563ba4df705a. 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/GX8LD2342548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b8c99d708568a5f51caee9a1a1347da7c833268b7dbb350a7f9e60e4aa9be6. 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/FR2X42314727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d9425df0c1a66e4b2b9b96b7bdeff7c232e0c32d306d9cab15ffd11b9bc8b3. 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/DGA052245768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3142003151c7212a004ad342f81403f60f2e478ffe5b7884e59cd936f1ce0298. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX872274813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0265b675d47f6e6a25efb863beca013397ba9bb686f67fbfa7338d19a166db0a. 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/FRX762204426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec4c46dbf96e84c589beeadd1992b2fcff0e7370aec866691ed5cd1576f8272. 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/FRX202244815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1793d313d806b27a5f8462243ae9d4c860de8c5987c442bb3b625c437ee9c855. 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/QZS662226155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8dc731749d494e2a7f6672603fa7d3e92bbb3268694a6d5dfd448183245914. 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/QZPEW2559175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57e415447bb27ffb72382358c2f4966891714db8509eb3fdb40efaa8068b994. 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/QZPEW2559176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867316e8af6c4b53e8120b67851b429a381bc2789082de92bdd22b70ed6468ed. 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/QZPEW2559177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55553aaee036324739db5899206609640139ee2879ac7746c2ca48a39ef03a97. 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/QZVEM1872441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f55dec4be19e1091af78bca90c54914cc8618c5e448692d9a827b4078f5d1e. 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/QZVEM1872442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61ad9adbd8feea30e08b28a007f2b5b2e63228bb33937dcf4d8b6e1d87dbf90. 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/QZVEM1872443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2539fb3963bc5ccdef4fa4e8c1a5d41644507467a1c1cfd8043ddd18aeed66de. 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/QZVEM1872444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d7eea0db8fd20469f105699c607d0c3b2382ad78f4729fde3c3da9143045b8. 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/QZVEM1872445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5dfd9e3aac5c6988214764cb92df1a7a9d7f3e5f6efad66cceb1876de09be4. 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/QZVEM1872446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2d6cf33a4eea2ea32972309fe4dd9ea3f324b4e4b0a16b6aac821867d4c6a2. 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/QT2VB2444961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33d7dcdb446620c8496dd2de5e1efb1fcd2d75064881df8472c1a064296366f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TLVEM2429246.