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 0x45acb5b1f2be08af822ba93ce510e5f4a98d409eb32a27f1593c28de3472f831. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1208e040-37a4-4413-bb01-9761db1ba3fd.json and https://artists.proofprofile.net/proofs/artist/1208e040-37a4-4413-bb01-9761db1ba3fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
18 Liebeslieder Waltzes, Op. 52: No. 9. Am Donaustrande
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 0x56552027663cdcd799cb75de4d78ff2762e0e931d1875701609b93f969dd41bc. 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/DEGF70830409.
18 Liebeslieder Waltzes, Op. 52: No. 1. Rede, Madchen, allzu liebes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884f888a23c0e03e918c9d243dbf0c0880836dd33dcedc97d14dfc26f6d32d40. 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/DEGF70830401.
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
18 Liebeslieder Waltzes, Op. 52: No. 2. Am Gesteine rauscht die Flut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdb7a49ebf04e62faa1639c913391faa914fa88a0da3fb34633ec1c0ef81ddd. 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/DEGF70830402.
18 Liebeslieder Waltzes, Op. 52: No. 6. Ein kleiner, hubscher Vogel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c781094422208e9fb06fb62f93972544fe94d593b80deda0d2fbb4ba0bd714. 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/DEGF70830406.
18 Liebeslieder Waltzes, Op. 52: No. 8. Wenn so lind dein Auge mir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678e891b680df4f640db5e8bf3644ac3fe5c62f74f7da2dc79582f7f2a4bb928. 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/DEGF70830408.