Andreas Schaerer (born 17 December 1976) is a Swiss jazz vocalist and composer, performing internationally, and an academic teacher. He founded the sextet 'Hildegard Lernt Fliegen' and collaborated wi
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 0x004a75563a7a0f877c8cc06dcf9d72c54fe535234be0145fed0792bf90d51849. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75673eeb-d1e6-4083-bde7-ddf875f5dcab.json and https://artists.proofprofile.net/proofs/artist/75673eeb-d1e6-4083-bde7-ddf875f5dcab.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 0x6ba8d4a2c0c5d578b5038537cbd8a2c71d75982c66e3ca8d9ee0ac6c3e74fd42. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEA891800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8134fed3481f763797d32c99141078401c2ffdb90067e77671d6ae6c93a0a1b8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEA891800030.
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 0x55de6b2f998affcca6a79a1deffc1a249ab483faafbb86eabe100b710ecdc1be. 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/DEA891800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fcd32f8dcc88abaf9dcb79e94bde5357147e5e7d8f2120b5bad202abbb9910. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEA891800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0330c947b0ceb500aa9749c7d6bcf3ebbf2b626a50c52dc1bc4ca38beb50126. 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/DEA891800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b95bf569f0ff3f15373659d19b755c464a621c816f416a747b97ff53981ff9e. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEA891800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7836c517518b322bfe12902fad46978fcf73974a054c1d5820a81907eae0cbc8. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEA891800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81ca628f011d06cf35fcfcc2778f8e7ac64532d1933701d6de9727652d6b14d. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/DEA892400628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139053e46bad7e451a04225cd9f9b73b5fa15ccd27f05e24dbfc8cfd195286a1. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEA892400630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d2088d723218317cb2459a0a7378194e3cf6a68042a8ca3d895af756131e96. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEA892400634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb636dc12b6ff5c771f878bb8b5a014e72cf5ed6f192fe521dea48fca3cd7bb43. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:56:03Z), 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/DEA892400637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2de92b18ca4ba7ef3f54e3f07f9a051e6f307b574a99e61d53b3019fc95ce51. 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/DEA891700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be06ddae8d3b85c72652bfbf3f0ec77ee47dd3e311545644145a0533ac86f0e. 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/DEA891700081.