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 0x044b6483f42d6ac500e49a51341e4209787a1251ecc5abe0b0e09dcdeea60b29. 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/8984aef8-d974-4d9d-9e20-88fb0b47a67f.json and https://artists.proofprofile.net/proofs/artist/8984aef8-d974-4d9d-9e20-88fb0b47a67f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Burnin the Old School Down (Presented by Toughtested)
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 0x36b0d073f2f210009ac93f2e1c5a79258e545bc8a6ec0332ce3420c5a6b31fd8. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QM9AA1803688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9beedb766213ddcf3134fbe43253e004a295c1eec6b227e9dc59d6f659dec5c. 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/QM9AA1803689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9c0aae7b2c641b76d088ede338a21247b134cebb7f3c46b4f73ba04421182a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM9AA1803691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28304934ad0ed3ebd8ad21c758b8b2cf7c52d66eaac131de61f9041941f0216c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QM9AA1803692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21156ab97869da9e908b289f6e7858fc72812a2884eaa438d0e0501660175d5d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QM9AA1803693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa360d8a1329903562ce111db43dad4a155669e6885f1ee92eea8093860114688. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4Q1934553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961cd6e93c7dc44506a9f861319d11186a70920f368f5a24acb607ec9a0923e6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USL4Q1934545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9ac4c512416693bced4d2b53dae2093d9215154c5e8faa061f6cb956b75237. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USCGH2075829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d46340b50a13f338664fe9e4c809364321c0dd15d5ef2f914127b6699eb85c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USCGH2075831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18abc1ea9e200dff8a7db6a6e94620ecbd5f63c2bea624dff21dcf95e71cce81. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USCGH2075832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df41b24a62cecd1bc470169e96568f811dbd4605d17ec6bbffb5ce9a862143d. 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/USCGH2075833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4219021f22015d742f23d05fe5eb5395502c1ed2c1ce42ec6d5f40cc8254d225. 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/QMAAK1625547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462904e3aff89b9f70d8d7ffe9e1286f86f0f79bcd6f965977ab4db321221600. 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/QMAAK1625550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa050178d27064f8863990cc7d01b348bf0aea2b6d3b8b617d0676dd287ad32e6. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QMAAK1625551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbda88a1ed54fd36a27d19a52a24f9d7231d2122140bd76c15b7ec93e14ae62. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QMAAK1625552.