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 0xc591ca4439e49aa7a687e777cfdd39c275742ae6b114556c1406c76c5621fd90. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcba538e-716d-490f-af44-b90657593057.json and https://artists.proofprofile.net/proofs/artist/bcba538e-716d-490f-af44-b90657593057.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gian und Giachen - Das Hörspiel 1 (Der furchtlose Schneehase Vincenz - Der Sternschnuppenberg)
Chapter 1 & Chapter 2.1 - Gian und Giachen - Das Hörspiel 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 0x12e3fc6bc6695210ceacb17feb4c884f5ae3705f211254f4553ff6e816dbaa61. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEVP80391047.
Chapter 2.2 - Gian und Giachen - Das Hörspiel 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dface2b1a964226706b6056351bcd110326cfcca5c57ff7bc85693023f52f49. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEVP80391048.
Chapter 2.3 & Chapter 3.1 - Gian und Giachen - Das Hörspiel 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41a668cca5cae3a3ddde591a36611802667cf1b0f560ee23f32971055b3b8cc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEVP80391049.
Chapter 3.2 - Gian und Giachen - Das Hörspiel 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340a83f1250f398620ce479981c472bf7a984ad37569d53873eee11269d84b9f. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DEVP80391050.
Chapter 3.3 - Gian und Giachen - Das Hörspiel 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6832b7a6075c69096ac5b4879d9c05e90cd833dbd9ce82acdec32bf293ba9ab0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEVP80391051.
Gian und Giachen - Das Hörspiel 2 [Das Munggamaitli Madlaina - Der grosse Frühlingsputz (Schweizerdeutsch)]
Chapter 1 & Chapter 2.1 - Gian und Giachen - Das Hörspiel 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4c81be40da88259bdfcdc245e4e7e4723be552b76ff64812ed757b32df742. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEVP80391032.
Chapter 2.2 & Chapter 3.1 - Gian und Giachen - Das Hörspiel 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c05dfdb183d6d0f6bffbfb70fed6bc7151561d42c340dbdb50c2037d4f06404. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEVP80391033.
Chapter 3.2 - Gian und Giachen - Das Hörspiel 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b1eff425d02ee4331a62f93c982c7ee0aadd9f99f07e61b8fe660c25ca407d. 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/DEVP80391034.
Chapter 3.3 - Gian und Giachen - Das Hörspiel 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d32f15ab405b5343eb89ccfea958a88d41ad19992bc9eb5c430cc8f381b84c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEVP80391035.