Sarah O'Brien is an American poet. Life Her work has appeared in Eleven Eleven. Awards 2008 Cleveland State University Poetry Center first book finalist 2008 National Poetry Series, selected by Da
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 0xad46d327c0aa11ef5a0b0dded217c677498a00c2458b1f6a857a866f9b4439f5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10b68d85-ba45-4f09-b32e-9a1c171d49a9.json and https://artists.proofprofile.net/proofs/artist/10b68d85-ba45-4f09-b32e-9a1c171d49a9.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 0x6ad0eff88b5f390e07727a9727978d305515225833ebd33c1c96238283d504ee. 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/DEE219780701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a574a6f23b765c2f090ea7997b42704966450b9ad6b9a096c3a5800f9f201b6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEE219780702.
Suite in E Minor: V. Les rappel des Oiseaux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc3775b991a61a115a739cfbbf31b003c773b3773a2eb36996b94dd3e19470a. 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/DEE219780705.
Suite in G Major / G Minor: IV. La Poule
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846270de1b94fb29d28a3402b113669c8138a537014b0d64df08ba968cb83104. 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/DEE219780706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c25fd1cd0dfb72e7e5f4891db140beef5d4dbca9d142c922af08952af657eff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEE219780708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6331a02d9791edb809623e05b16b274eb3413657a5151d6748368dfe617a23. 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/DEE219780712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613e40e5fbe240df3fcf1c107462ce729afbece872ac863a86cb35781e4399ba. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEE219780713.
Sarabanda e Toccata per Arpa: II. Toccata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574e80735bf5b5969ac1377d61a129768b5f2fc2ed8a1d6fecb9259d45379279. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEE219780715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc30deb35908240c4e37db7dd9bc4e6395aa956a45b373c4f954933771107d28. 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/DEE219780720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76345c4c5a7a716b8a827c2bcbbbaaea5a6428ce76a05310bcd0c2d54ca229dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEE219780721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ca81b4ea32e294305271b4bde31deb359dae805a1ad0c82432ee560747138d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEE219780722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f3f9277514849e5e6be51744393334797d0e0f847076d4fcb8e8670cccde76. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEE219780703.
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 0xda3389ffdc2dfe86af037651bbe2d3a8c973d81188baf5882a8e2bf40dc3ae3b. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEE219780704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6818ed3dad3675db424816b10c277141923378d6783448535fe262cf6bdfa47. 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/DEE219780707.
Sonata for Harp: III. Lied. Sehr Langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2c9ca111ab1ee9a2bc7629029ffe917b2457a4f112f048f96025f0cbc93650. 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/DEE219780709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4376a9a509bae1cabde2a40ad07d8fff4b4f5a98ade84cbd4ba26de34996a6e. 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/DEE219780710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379f115e7726322c41acbdbf4ff4cde5fe3247fa89bdd3b812c93d7bf6574c04. 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/DEE219780711.
Sarabanda e Toccata per Arpa: I. Sarabanda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41a9bd58f7f21d8bfefea727c8ee4b301c9b42df35b87487ff8107ec645713a. 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/DEE219780714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4275d5ca8255c19c85a74cd76f4cb26fd00847bad80e1fbb51fa1ede4ffe0189. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEE219780716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2579862c272a26b96cee58de08f84cdeff87ecf115c02cbff6a19c773edc3a2f. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEE219780717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc60deaaf9431069185fc56b52c705833e5a518e880b3cd0de52a165b02c2b0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEE219780718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48934a506f4e80367c8eac9304b2c50969d658d37dfd6954d7aae1825cf3c524. 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/DEE219780719.
Henze, C.P.E. Bach & Mozart: Konzerte for Flute & Harp