Kathryn Toyama is a classically trained pianist/keyboardist who composes new-age solo instrumental music. Her album, Hope for Harmony, debuted at No.5 on the NAR World Radio Chart in May 2007. A num
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 0x9e52950da726801c5a87ceb06e247424ecec2b250cf60c7187b266a495db105b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f037c37-5091-49f5-9509-1f86ac8a3070.json and https://artists.proofprofile.net/proofs/artist/9f037c37-5091-49f5-9509-1f86ac8a3070.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 0x615568468512e5560dc1463c96a8f0db474727650cb870df0618129485786274. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USX9P0676260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff2bfd8a320eb388296e013b4ad3599d59f4d1b89e32c25ca85b676608a7a0b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USX9P0676261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c58a91abcd416f9f05b091d1ed2a3160a43d56a517b6729d4dea1a54069462a. 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/USX9P0676262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37906a008c293674a53c67d813c0d6c8586e0ae2967c96553b966dd86155da67. 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/USX9P0676263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a698b0057b52d503ec27da4e8c2bd84f78e186b9f5d2c9a645f254eded6ac5. 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/USX9P0676264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b337a792397a965897162c3663033ababddb27d96fcc3bd6b85f573cb229ea. 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/USX9P0676265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a72f131eaa8f51a5e21a6fd8bad0845545fb698ab89a8fac579536927deffbc. 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/USX9P0676266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1ad2ab2c3f07c5cc48c9674c3c9bf75a951a7f86cd989999ad19b883194dd4. 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/USX9P0676267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375663e53d7bfb866053dedca37025cf236bb0c133d2e0f566f65c9f58d853a1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USX9P0676268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd57e264ee3c1f97d4a87e6a0788f0f65b6ec4aaf32acee79b80c0dbc91cad3a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USX9P0676269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b3247e52d3c52297b5954f43f8165c5ba8e143f5596ed897aabf1db5fcb37c. 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/USX9P0676271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9213e9dead640376c1e23d3f8d75c957663b237ae5b75dac163e7d81feba8631. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USX9P0676272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4d7c391cd20ff4aa562bf2794b7a14700a328b5ba0cb884aa438014b8a12f3. 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/USX9P0676273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0783c9fb2ef05a4a7d1873864f919add52b728bdea6156c871e0cef9f2b991. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USX9P0676274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d6140968c033d99994f3e4b3eded906a0edeaa073ea077ff249912d29c3dda. 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/USX9P0676275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c0b49dbfab13f3292f081c852ea40e08d80cac28137ffc46e20bfd40943c57. 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/USX9P0676276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebca131863855fa07f6dc300829cb1b657a1c421228a881e6bd667db558e963. 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/USX9P0676277.