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 0x11bf8ee234958a16fb9440de89a848bff4c6756a0fdb23cb6f104ce640bab5d4. 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/8d1cdc68-7260-44bb-b63f-5cfe7f90ca5a.json and https://artists.proofprofile.net/proofs/artist/8d1cdc68-7260-44bb-b63f-5cfe7f90ca5a.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 0x2442064858ba559f4b260d7e586468d65a1b91ceca53b0c25764d632d2b30fc8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCKWD2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818ddcab049768e9ba0d83df7fb5d24351bf9a4901bfda49bac9393b37cc5293. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCKWD2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec99c5611e27af65738b679bc441583c87e3656924d4ccead5faf170656cdad. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BCKWD2200001.
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 0xe2bb98bc56b944dc39a51bc17e178b749379521231d77c73dd2c8c0a7f7b54da. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BCKWD2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9148d5528b6f284e92ed9c206eda58a533262f063f968ec7ca89567d6aaa0ae. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BCKWD2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124180c6066a4207d6c15c114132c34323d82d9dde45e8f367ab9037572df280. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BCKWD2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82db9b86989de509d52218b0d8f55ccaa7815fcc9a0a53a3f88403eeffa4a2a6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWDE2223515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d02ab938c55a91eb49377e6d9f8a1e035957ab187fa688a5cf28b42e260f88. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJW2431342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69df6154923671e41e3bab0c94222f215a8ebdcb46cd5b5df605f866557be5ec. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNJW2431344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0111684666601697251f243b15f268da1ebb6e3a95c6c726121c0c1348cc478. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHZ52083892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbee413752bbd237127d5a7123a764c68217213157c409ea55b1fd52d6aff78. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHZ52083893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9229fc94bf92ba97f663cee386765451ef8be0bd4c514867d34015178f3349f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ52083895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ecd1b0a434b711709e9bee84cba454f5ff122b4ea32134bb956822d6cf4f9e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHZ52083896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bf49ff9ddf5dbacebec9ce6c47905fc82c4f3ad6d67da562b6ec4932af3bc8. 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/QZHZ52083900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8d69d31de3a0ebc6acee63caef37fc4ac279fa8dcf7e3d2f2680da5fb3907f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZHZ52083891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe219c190abeb84d2341ec969102a954ef51aed42faa14bc5bcbdf6ef4106a5ba. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZHZ52083894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e651c643120c1f3444c795aa95bef543ed622f6c67709baa8ef273c0cd52ba. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHZ52083898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911d3a11c7b58b500553098442bb487888c91c4a202245323c04be0a75451f12. 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/QZNJW2454508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208f48e68925fd112d365a1d59fd4a562b2eae6f462e6e26eca6e851b4944c6c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTPX2133850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d98532c7b955816155dc924ff3a386f8f11bd0548c06cd980793f61db1b17c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJV2101322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9049e2fb2ed8e684d55855f935b7c6d7b417ffca84e433ae86cd49131105270. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNJV2101317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e49b633b2d537f4f89cdcdeb1eea1c741419869905a6c71e5570d15413405e. 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/QZNJV2101318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bba22488517c8d85ae749f2d3a556c38375897816db07fe56a769ceae72a80e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJV2101319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b34a47ff49bf344f02642b643ac42481564dc7a66d2d659adf2367678803864. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNJV2101320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37db0618440fa1e2b4bccfb20b758f1d11d68f698ff8f53cedd8f4127b5375d4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZNJV2101321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9dbb7960ffc7954f3470e698cc835eb71e1d67e1e051084ff9933016edaded. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ62116180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f1f89a90a8de003f8f14d241fa971cf3eb7b613b63a5728d7003e8ce30f0db. 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/QZHZ62116181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364aacd5ddce62071476e02e2551e411bfdf7da64ef0ed7c3dda754de4a26c3c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ62116184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24815bc9ecdd3be461d365f60c0006efd900a29bac9f5e6b59932174a4d2f1fb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ62116183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7904d4fd4932a6ecde982b01bf0833d3e02d603e89dd7a90e25a4646d95af1f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHZ62116182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64956002660c723129062094ebb7a61c62c2722100f5f8ee71e38dcf5b9069e2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHZ62116185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4b445a2d580137e161f178606cb876990c4077bac3901cb5048f4ed1190189. 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/QZNJW2042206.