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 0x60c461407860120428bd6e688ed94a95d1de1cb93a029990ec2da847e6bb8937. 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/dfd7f814-187f-43eb-b0fa-e073520a8486.json and https://artists.proofprofile.net/proofs/artist/dfd7f814-187f-43eb-b0fa-e073520a8486.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Charlie Brown Thanksgiving (50th Anniversary Edition)
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 0x1cc24262a0ab7562a7b11376ed6a91e22e69ba48742bc8c58e052ae489a164bb. 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/QZTXJ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40dd5ac4270e660e773d2621dd53b73d73290141c484c4a406babd1fc21db60. 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/QZTXJ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba25ada6c5f89eb449a0b4fb31d1ae3b90b9209460cd6f319a7079546019d75. 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/QZTXJ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aad1baa32a78fa55b10f1473dd16028e1051d9291bbac2b5184116c9f1860b. 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/QZTXJ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819dce3d03e118d05a6d6cf7ded17624ed42ca1c23705804c8b0dde21ca5ed17. 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/QZTXJ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b57c1765337633160cd89d43989feb10da696ff951c9be0e57897146b88aa2. 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/QZTXJ2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c8600a1662fa5824f45f17d52ed50f79c4fd31e36ccf2e8b6bcdbaaafa29e1. 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/QZTXJ2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88c7a4f30538cccb506235bbc2657835e001029bc476b6d722875c827884116. 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/QZTXJ2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45f122be1935128330eff2b1ae3db05d10cb5ef4f93a69ff2127d0cee575ed7. 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/QZTXJ2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d0407202891b78c444e137a7280183e37aab55604d5dfa40a013ff61866dc6. 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/QZTXJ2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1385cae520e11c514b4de7b993e8f4612d704eac07c2376171d62f7bae3135. 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/QZTXJ2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fbd5cbcad470954d1fca56307bfbeee0af937421e4762e8f697c63e6443ff4. 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/QZTXJ2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc321b20ec4e1d693f628409ec705c05f696d7eb05eb73cab7cac2ed86df656. 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/QZTXJ2300016.
Thanksgiving Interlude (Alternate Take 2, 4 and 6)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c469c883f1ceee20ea846f68862cb9b418c9dd7c84fb401b5463a945c778e2. 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/QZTXJ2300017.
Is It James or Charlie? (Bonus Mix with Whistling)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1e5e8aefdb83bc1ca01dc5ab3d8d97a4b34f5045510febfec4bc877e0f7e23. 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/QZTXJ2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef710aabbac3905dbab24f3ee7a40c93590061ae82901ddd19aae1afba5f6474. 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/QZTXJ2300021.