Sarah Elizabeth Richmond (1843–1921) was a teacher and the fourth principal of Maryland State Normal School (now Towson University). She was the second person to enroll at the Maryland State Normal S
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 0x82d8d9326d7c165b817503294bcd65c54fbbeefcdfcb2e11bb2dd4408ab400b1. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/872bb71d-1732-41c2-bba9-57ffa3e75dfd.json and https://artists.proofprofile.net/proofs/artist/872bb71d-1732-41c2-bba9-57ffa3e75dfd.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 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 0x00676680a7d2a7ef0275c4f023e015bb4b6dc6b5858c2b4ec74828ccd8108ff7. 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/GBBZS2569401.
El sombrero de tres picos, Pt. 2: V. Danza del molinero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde85e5a49dbd6a9e864a82504c422dc3b52a866581aa13beffb1fac0b63f2963. 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/GBBZS2569406.
7 Canciones populares españolas (Arr. for Voice & Orchestra by Luciano Berio): No. 1, El paño moruno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8379da283e5b5fd7d0c1aa67a4e21b914c98bbb3d6977f84857039e38f643a3. 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/GBBZS2569412.
7 Canciones populares españolas (Arr. for Voice & Orchestra by Luciano Berio): No. 2, Seguidilla murciana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4066800d67630ba7ac2f3d9dea2d32e58f91a5933c76dd240f00e5f11d4a841. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBBZS2569413.
7 Canciones populares españolas (Arr. for Voice & Orchestra by Luciano Berio): No. 3, Asturiana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869553484b1092d8726eccc8a33f5b666c64f9d1fb6955821bbb1d4dedc946a2. 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/GBBZS2569414.
7 Canciones populares españolas (Arr. for Voice & Orchestra by Luciano Berio): No. 4, Jota
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8942a962167516f646b1702b5b13b6028d784e3b8cea862590081470b93e2fb. 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/GBBZS2569415.
7 Canciones populares españolas (Arr. for Voice & Orchestra by Luciano Berio): No. 5, Nana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86aa15bff4aa9d16b7df52664412e71f50baa997fd362f0930cc58d1ee14a3e7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBBZS2569416.
7 Canciones populares españolas (Arr. for Voice & Orchestra by Luciano Berio): No. 7, Polo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85eec855623268d1dc4bf6a7383e6cd0e383c9a10bf64a7fb345c91a102c568c. 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/GBBZS2569418.