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 0x2da08c49aa72c9ccdcc1e1db128cb5f54e9cfcd8e698d03311e13eebad412854. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d8eb2f5-bbda-4367-bcec-9c7075bdbc71.json and https://artists.proofprofile.net/proofs/artist/4d8eb2f5-bbda-4367-bcec-9c7075bdbc71.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wagner, R.: Rheingold (Das) (Ring Cycle 1)
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 0x75a2da96c063a5295b7ba5a7c9d14775c607084383d31fddc13e56ea115fd5ab. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/HKI190567509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77104f58733e2ca6d450fcc390302a325ad88a6997bb9760d45e601828f4f8ff. 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/HKI190567501.
Das Rheingold: Scene I: Weia! Waga! Woge, du Welle! (Woglinde, Wellgunde, Flosshilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb568c7891c454b78947f36d3f67ae7f9d5d5073dbb0ef64ab9cac0deb5f0bf47. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/HKI190567502.
Das Rheingold: Scene I: Hehe! Ihr Nicker! (Alberich, Rhinemaidens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78b33adef8e88d8201c1ba2ae21e0550f2012bc02110b83e141e9dc1a87b5be. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HKI190567503.
Das Rheingold: Scene I: Garstig glatter glitschiger Glimmer! (Alberich, Rhinemaidens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd231af5be5ebe95ec33a11f9492ae709cf25e92fab0a15a36cc69faf1d3916ac. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HKI190567504.
Das Rheingold: Scene I: Lugt, Schwestern! Die Weckerin lacht in den Grund (Woglinde, her sisters, Alberich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c58ebdb33ed8c4d7e5f4195e33ff354874843635ac8a69305e61b8385975b9a. 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/HKI190567505.
Das Rheingold: Scene I: Nur wer der Minne Macht entsagt (Woglinde, her sisters, Alberich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965ba442d59f562bbaee92730ca5eef5f94103e025f0fb196a1daecf8ba56726. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HKI190567506.
Das Rheingold: Scene I: Der Welt Erbe gewann' ich zu eigen durch dich? (Alberich, Rhinemaidens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b3e5bce2c35d56800ee045b5f720fb5135de3669a44de3d849da57721d55a6. 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/HKI190567507.
Das Rheingold: Scene I: Haltet den Rauber! (Flosshilde, her sisters)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6b3ad29f64f292ca7c414656ee42452ec5e8e25a7d66c9e8562c2b077fabeb. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/HKI190567508.
Das Rheingold: Scene II: Wotan! Gemahl! Erwache! (Fricka, Wotan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60be1b2621173ce8cecbdb18de2affb8559a514e6cc29f51540b6cff9c3311d. 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/HKI190567510.
Das Rheingold: Scene III: Verwandlungsmusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa3b29432be42890fe8259925f48933a9972cbd06c9362257dc4091cc25375d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/HKI190567521.
Das Rheingold: Scene II: So schirme sie jetzt (Fricka, Wotan, Freia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bd7cedb50a3110a735f13ce28c0a0ef2b7c44d84ce5e57f0f47eeaaaf2f336. 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/HKI190567511.
Das Rheingold: Scene II: Sanft schloss Schlaf dein Aug'! (Fasolt, Wotan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870820b22c05135998ec0b60864585bb8b4610ea48accdb63c0e6e7765a483b. 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/HKI190567512.
Das Rheingold: Scene II: Was sagst du? Ha! Sinnst du Verrath? (Fasolt, Fafner, Wotan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369bd4fdbb53b149173e6956bab2c5ec4a9fb1f600bc8787d0780de09a7a6255. 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/HKI190567513.