Caroline Lavinia Harrison ( Scott; October 1, 1832 – October 25, 1892) was an American music teacher, artist, and the first lady of the United States from 1889 until her death in 1892. She was married
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 0x2b64cc110b72688f3f056c29eadb6a4055732f12ca7d53f978de335b263f5768. 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/9771305e-a046-4be9-9b6a-823f58fb30cd.json and https://artists.proofprofile.net/proofs/artist/9771305e-a046-4be9-9b6a-823f58fb30cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Miss Caroline's Music Class - Love to Clap
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 0x3c8eed39463fa5f2ede8ce9659695714a13d0f8a7762d20283a422cee8e21aef. 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/DEKC41700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adcc1fa2cf63ee36eed9cd40763336448873d2e7dbf1afb2594847901dbee7e. 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/DEKC41700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ff58545eea77fdf80046d987d3d359c3006870c8a243d59abe0bcf7e3fa6b8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEKC41700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbbca9bcfd5d20bbb4b61a5039e3c52e4d94de1705491f37e460d8feef15321. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEKC41400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf23c42651d561643d275c1437e4d9f2650d9eca7f91204764c9f9471ff180d6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEKC41800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57c22b45ef05ad73e1e9689c6f12deee777e4b0f6a2e8b4f9ef581474dbf7e1. 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/DEKC42300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0830c3acd5e72ce40ebbf540b1ee91edf80b0751f938ad1546e3877d9834ff90. 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/DEKC42100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea34e859f61fea4bbcf0b544b9a105347451f59cfc182a0a6a1507df3e0b9980. 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/DEKC42100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e95d3ceefec81cc34a4f565ca31e62e25d40e62f83a1f2ed47203f7e002318. 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/DEKC42000052.
Simfonía concertant per a violí, viola i orquestra in E-Flat Major, K. 364: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f19898e16cd087e948dd39b6abf0282a09107a0ee4a3b3853741e76b86d354. 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/ES71A0910397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd662287f5b4402946ca67411a02679edb7981bf2210e8acd9ee54025dbcfcdad. 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/DEKC41600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e659361ee1eac80e929be4d612624e16b6aced0017bf4435140afc53175227. 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/DEL712000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea7faf44d1ac401ec32e2bc739da10c52a041437a594d23612f584f733066fd. 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/DEL712200496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42f9ec8c2c5f6161621325deaecaab1b836b4502b26a291bc1c94a6815c01ee. 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/DEKC41500116.