Sarah Benson is a British director of avant-garde theatre productions based in New York. As a Director of the Soho Rep, a lower Manhattan-based theatre company with an "audacious taste in plays", she
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 0xae6c0ed0653a8f5eeab6ef738b45ce1d770eb36a96f465caa5006fd426efd80f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42b85715-6198-4474-b0a7-afe2d9289f52.json and https://artists.proofprofile.net/proofs/artist/42b85715-6198-4474-b0a7-afe2d9289f52.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 0x441d72dcee2c274224038cda7367e076d5fb874065ffb22a1216d94669354d10. 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/US94N0610019.
Compassion/Beloved (From the Lost Chord)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71827b022e5ef6d5333834fa229df8982bc9bbf03f83600cafc52f7f300eac5. 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/US94N0610020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a14f2eb683cb581dd730d9d1cc9a7a3d9b64b3c2c3ebf1a96a70ca14ed2044. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US94N0610022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cf054256922ffec7a2f756f1d8317cdc9eef9746d9c3dc1bd5a65832e91e1e. 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/US94N0610024.
SONIC OASIS: 3 Minute Stress Relief Songbook
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aedc286b794621e92a5c1080e319d47da9eec8aaaa9ca7d0847dc313dddabe7. 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/QM6N22419980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151f479b13ff126f04461cfba7eac2849cde6f69a23b9fe3b53a6f70f7622db6. 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/QM6N22419984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1465bf2065d7244bef22f2e452992941f76d67cd432d0cdf91bc3cc410b237. 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/QM6N22419994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960c4f27e5838700a1299553be7129003fcf5b1b6306186ff7ee2a9d87176a24. 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/QM6N22419998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb113e6870f4d483a7512b44fb61def85a1f42a4af8f561b80c5c35d4d871797. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US94N0610089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4951e265d6fc35dc2369b4ce33d4846ef6a43d99cc66bc64afa6b9e7339714. 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/US94N0610093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26a1c390026017be53bc50b9d238bb507184ec44b40cedbdee9c86cd6820268. 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/QM6N22419992.
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 0xac84da182a67b58ed4e06be7b371f8de23b3479f5008a43af2a78588180cf44d. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QM6N22420000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9987667c2b38474ab44ae49b9281cf4f5465b9fda11215c4633ddd5dc31c3a13. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM6N22420005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6933b8d06b871429844c920814d3e07e380274c35d1b5893f03a7241dad4b77f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US94N0610086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacbe3b2157f68a3b9d3a965352904d17b28a5329ff824be1c8eb09c7dd90a7b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US94N0610087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd784d6ce264c4c66cdb300ac774e205cf91267561e2dd6e79cec1cc3d678f2f8. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/US94N0610088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2dfdd3865370e704e67567cefec1407eac2401f5a2321daca43d14da9929cc. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US94N0610090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ff054bbaaa19e5be3e21a9887a4b1e82dff703d5587187e6711b02ee2365b9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US94N0610091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5b7eac8a573194b74481d933c2c78316771be4dae2dfb7fec402cb81179214. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US94N0610092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2433649495fcf02fc961bbff78be08c1f5438a9230be07b1d78025cc501d3b. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/US94N0610094.