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 0x91dd82dbb09a993691da5067678fbf0dbaf13962cee35661e7a59bd0fc917e3c. 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/d151886d-3d52-4eb1-ab3f-05a85182e944.json and https://artists.proofprofile.net/proofs/artist/d151886d-3d52-4eb1-ab3f-05a85182e944.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hellmesberger: Waltzes and Quadrilles From Vienna
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 0x2b899d3e8a392bf2b4cde9278f4dbb87b63d65ac69fdf6b01db850627ef934c0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI199701604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b899d3e8a392bf2b4cde9278f4dbb87b63d65ac69fdf6b01db850627ef934c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HKI199701604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fb2ed53455fac5e4ec4afc6d017ff2fcd71d51b49b84a909cd3f5426d2d979. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/HKI199701610.
Neujahrskonzert 2019 / New Year's Concert 2019 / Concert du Nouvel An 2019
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cee23784333ac8ec1a2ef4370065e9f40de0eca7722abe79ebd9b813eaf810. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USQX91900236.
Neujahrskonzert 2024 / New Year's Concert 2024 / Concert du Nouvel An 2024
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5438c3e73f8f38f0045a47b89ce4628a4360dc11b07f4c6252a941e6111cc99. 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/USQX92306824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9d1b12f78d7919976b59a12a4589ed8aefe03d21ed1a7025ce41d7561793b8. 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/USQX92306831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a21c74f3cb8f7607bb4879e1362788647ce09b392b7715347e43238a4e3d679. 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/USQX91900224.
Neujahrskonzert 2023 / New Year's Concert 2023 / Concert du Nouvel An 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308eda732dc139ff2dc063713ff03d88d2e89fab61d1d7149498a400628e67be. 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/USQX92206259.
Neujahrskonzert 2020 / New Year's Concert 2020 / Concert du Nouvel An 2020
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137b400905b45486b51c741e71781e93e98f6f38229a95a17a778c8d7b31dddd. 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/USQX91903581.