Monika Baer (born 1964) is a German painter. She was born in Freiburg and studied at the Düsseldorf Art Academy. In 2014 the Chicago Art Institute held a survey exhibition of her work. Her work is in
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 0x18b6d7cb5da996020b465fa1e338c9bae8ee02e85b5bebab1a5fff69a6414872. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0254643-3743-47f6-a3a0-343950b159c8.json and https://artists.proofprofile.net/proofs/artist/b0254643-3743-47f6-a3a0-343950b159c8.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 0xf48d0182f11bae5255c90a0fc0100071310582884c5a8e9a1f0b6287c4383c1a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB331524901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dec2ccbd08ec024b424357c3c05394b6ab7f3d95de000b2b4222d4594fa641. 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/DEB331524905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b608c56e155a7c63e0c79185b3831d9bdade01d283189785831f9f74e5862d. 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/DEB331524911.
Pavans and Fantasies from the Age of Dowland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6194077f8fb0147046f0cb844be3ccbd4a9b36fb592fe760e9badf5d75f32bc5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEB331318902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a3641111b3e99844a401cde2e2c8296fa1e68d7dfa0e2343510134ac284586. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DEB331524902.
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 0xc22806b6dde76f6cc9bb584b3ed5f7ed75079fda65b0bd8579e858c811f7c4b4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEB331524903.
Fantasia for 4 Viols in B-Flat Major, Z. 736
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57f5b1ee0f8a03f92e2fa810f96725e39a91bc9ba565d7b3fb9056261d57ba9. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEB331524904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7350c0f11a843b616c240477fcda459b543cf19d86219fd1168eabc8fe93bbe0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEB331524906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97cd40e8167936ad84bed2e3aea714f4204d33e6a3d90ca422a77d291097290. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEB331524907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a68aa7d33836b8f658a51d70819fb42c2f2267c2c70722525fe9dbf934cbdab. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DEB331524908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9616cf04d172b7b42bb9787377aca57aea1ada57d915a4a5bca9a256f99ea9d5. 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/DEB331524910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63746875165f2d49e97315d8c9a3937f122c771b684da04ab51d5667f1be865. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEB331524912.
Lachrimae, or 7 Teares: I. Lachrimae antiquae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca5d31ea48712908bf89e50f5dd907ae084328d32f545929c0c58194217777b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEB331318901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f0c51b45164cefa26803616bef9de2bdd2e2853b2a0f8954d2bcb61063ec3a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB331318904.
Fantasy for 3 Viols in E Minor [VdGS 10]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010f2647c06a484dbfe6336a2cee5e0f35e75cec40b93b34a42d713917d4980b. 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/DEB331318906.