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 0x291530e976fe5958fce834de880ed26d3030520447fe22656133008f74a02a93. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e58436c-ca75-4f08-a14b-c8583754a8fc.json and https://artists.proofprofile.net/proofs/artist/6e58436c-ca75-4f08-a14b-c8583754a8fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Eine Nacht in Venedig, Act I: Act I: Duet: 'S ist wahr, ich bin nicht allzu klug (Ciboletta, Pappacoda)
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 0xa096e71e7b4447cb0cbd4e96fa31c7c5457d5faccf61a1937dd958f9da3e16a5. 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/DEU921545003.
Eine Nacht in Venedig, Act I: Act I: Quartet: Alle maskiert, alle maskiert (Annina, Ciboletta, Caramello, Pappacoda, Herold)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5623bdc0841c067433cd2e4a4c4c80736729de465c0b1e4627267f91c6c464. 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/DEU921545008.
Eine Nacht in Venedig, Act I: Act I: Finale: Hier ward es still (Duke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db37e9ff9537d5c06ce6b1d67f869a544ae578ef050f5eba32f26efb57dfda8. 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/DEU921545010.
Eine Nacht in Venedig, Act I: Act I: Hast du mir ein Kostum gebracht (Pappacoda, Ciboletta, Duke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafbe75f35c7fa0362c41561f06ad3a0eda8c9a57fb1244b02f6b0ba5ef0a45d. 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/DEU921545012.
Eine Nacht in Venedig, Act I: Act I: Komm' nur, liebes Kind (Delaqua, Annina, Ciboletta, Pappacoda, Duke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd3d4b8e3ad57ba3525f67bb58096aabfd6c2aebb8f810109668337cfdfba2e. 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/DEU921545013.
Eine Nacht in Venedig, Act II: Act II: Lasset die Andern tanzen da (Duke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ffba2b3a31b8997d593714681fab29deebea3b618101c364f47b362bf0edd4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEU921545021.
Eine Nacht in Venedig, Act II: Act II: Kommt, o kommt, ihr holden Frauen (Duke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bda1cbcd54f2f56b4524611368e39eb7d5bc9188f3dc721c1b47443ac2bbef. 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/DEU921545022.
Eine Nacht in Venedig, Act II: Act II: Horch! von San Marco der Glocken Gelaut (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f11f88901ba305b0077149d56fdda205ef9a7f16253b22dddf26575937cc92. 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/DEU921545023.