thumb|Papierkrattler masks at the Narrensprung 2005 Carnival parade, Ravensburg, Germany A mask is an object normally worn on the face, typically for protection, disguise, performance, or entertainme
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 0xe5c9d3936490f869910a8007ecdc9474a4afc464f7a4aca0a5a0d9533399cdb0. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e20ab16-dfe1-4940-a745-1a562498e98a.json and https://artists.proofprofile.net/proofs/artist/0e20ab16-dfe1-4940-a745-1a562498e98a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sex & The City And Other Ultimate Hit TV Show Themes
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 0xbe8a5ceb4fbd3c1fdbeec1288afd2e5c531fe11609f38e3ffc7a2423429c0aa4. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/NLEM80819116.
Music from The Lord of The Rings, The Trilogy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd295942ac9da7512629e1bb8b8b993e227ccc9402ee2d059eab727611aecace8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SEWDL0211028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f4c265812caeadefc60e2b28a2b75decb7acbd6a19d64d581a9299e6bb0435. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEWDL0211032.
Tribute to Ennio Morricone - Film Music Maestro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c3634da664a8934c3bdd86422858441c8120d9dae522b24f9a25a788110b67. 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/ITRSE2000059.