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 0x71d99a113b9e03da0c38a3cc7bfe481ff5e97fc05270345c77e491c92961f0aa. 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/d046c82b-9025-480b-a2a9-a035f3f570fa.json and https://artists.proofprofile.net/proofs/artist/d046c82b-9025-480b-a2a9-a035f3f570fa.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 0x1582e1bd6c0da841738c26976752f7717061d9ebe620d9219b20025dc47fac36. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA1D1823786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0298a9dfa982109c0603bf326a93866e66912cf11e051f45742fe6d19eaa5dff. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZGLM2244307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f4ba02869ed48a4967a68add5b2dadac14410a03c9be7ab483d8d00a29b30e. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/RUA1D2502558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3598c74742f951c56745ad1c52acf2e828fe934f6121b09f8c29c91e2cd2bfa0. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZ5AB2238113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7fde07ec66e1b76c79ef247d72688bc31b329eb85dcd85c80c784af2fabf39. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHZ32232284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92add932fce7ad610f9d15d755720384a131f58e5e3902d88e939d84252d3007. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHZ42200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0816899f071a533375fe0977a4844fa19ee8d1238658efc5c5cfff5915656dc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA1D2269301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d35e8bc1652367fc748046dbbc85889568258b3a3c7403096523e8ce3bc506b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1D2269315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118fa5e8b35359b43f1dd0dcd87f58024700e08ef463419dcce5384bfc014828. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUA1D2269319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1153b22de829e203118a650663551b6a097e774fde7539f78166344b0faa3bdb. 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/RUA1D2269321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a5253e57fe56cfafef38eda8c40f472196aa9bac46c1f3ea90912da79566f9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA1D2269327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5744074fc8f768781583843b624da989cd4b2dd8dd0d9a2c6810351642277888. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/SMRUS0074223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fd62690b7f6a85859a9d285f94a12302b01e7852df1d3e8ecb182c798e987f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SMRUS0074443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d154c9fe01e1bc0ff28de609f7b2502998c3bd33f2e1584c7f1cfafb4aff7d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SMRUS0076939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d777d572e9b84446100ada5486aa203ae5e1211f99748f9a4a57d851db24c8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA1D2446001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcbb669d073c4a9856d8308bf5233283a4b70454354b2b848d7e698089097d9. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/RUAH62426600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b305751d9addffea85019867bc2b819ccabad6a43c74313e418ae49dfa3013. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/RUB422501434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6396c6ffe00ec9fdb3141391fa2be49690a672e10fbe043d679f36753761b234. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUAGT2520134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4736835035cc04d5e8fa18962affdff4a89db2dacdb21392765519764dca760b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUAGT2579488.