right|thumb|Fäh sings in 2012 Linda Fäh (born 10 November 1987) is a Swiss singer, model and beauty pageant titleholder. She won the Miss Switzerland title in 2009. Although Fäh was a favorite for 201
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 0x0c7f31eed6f2271259e0f4f4a2bf292c569214223cb1f38147568b2a282cac77. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2095f4d5-0ac3-438c-9e0d-b344d5fdb0d5.json and https://artists.proofprofile.net/proofs/artist/2095f4d5-0ac3-438c-9e0d-b344d5fdb0d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x461acdea7fe87b105791f08c4affe70ec739da0e93954b5189a386cfd961f6fc. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DEQS91300721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84a5926ce8f1e58f097d01fad3a0c42f9906d3f3173a625587e0fd023e9751b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEQS91400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100e40c8fd498ef0fb48a51f94ca4173443488efc5d54803000e2f67281eb949. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:42:49Z), 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/DEQS91500734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4531135c1202b90f60963bee3be00c1e8ce19177e13cdcdc1457d1a3e061d75. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEQS91800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dfc8e2cdaae886cd8e69305773ba72a91b78842ff9bc21487ade4780f4deb4. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CHF682200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bae1bee8c022b8bc60940b1df6476ef8d17a1397f79be7e97e02c0ac1a82647. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/CHB362100191.