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 0x34501909e9ac86f0fd71a0747387b0493e2cd7b4d07d088e60d6b818aad3c0f0. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/093117fe-3bc7-45db-97a4-8bbc1bab404b.json and https://artists.proofprofile.net/proofs/artist/093117fe-3bc7-45db-97a4-8bbc1bab404b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Farewell (Live at the Accord, Champaign, IL)
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 0x5a65a3f90c7882de0b18e7673cf992442eb81891364f98bf8c8fd7065592d02a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QMAAK1650099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3362f04347e1008a7054d7b6835e2413a0b4f47091a5ab3b4f4614ebe6b4c2bf. 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/QMAAK1650101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44b09fcde858974fc68419ada19fe5ddd64313926c91d5712d88d1f0e1ad5cf. 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/USHM80989841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bd5eaf617c8d28b582f4529f113d3ecfb2226fdf284e5079446a4baaf39c00. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHM80989842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d728b82149e679506ea514a025becd029dcb90a37cf7859cc824df5ce2554c. 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/USHM80989843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a210930347b340cd174c5ebb882c3578eececfc98852f8bdaea057c46b762a9. 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/USHM80989844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a021fb4ffb3997da742437de2b5a3c49353aa8a548506fb2d0642d1722fdd68. 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/USHM80989846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80aba8751402ebbbd4d4d69639e35789a7d47954ee828abe16f42fd7aa16ed7f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM80989850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2a9d60ade999afb53cca2e20036a0d69dfb375520ac30fe02e168eeadddb0b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM20780679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f9f2a3f036a8a0d63fc850d24429701801a7d06009a3d376cd07d3fd011d79. 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/USHM80860052.
Where There Is Ruin, There Is Hope For A Treasure
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa0105ff3aa0e2a2e6722e937197bb8f0458e4c25889164a4d7cc6af5869e0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USHM80860053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245a93393fce2a6a15d9a3f187aac34edebea2fca08dec72257e6002e157f633. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHM80860054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b6af02762e3416ac1dad84111c323bd82fecbad3bb48edacbdac21f27594e9. 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/USHM80860056.