Marshall McDonald (October 18, 1835 – September 1, 1895) was an American engineer, geologist, mineralogist, pisciculturist, and fisheries scientist. McDonald served as the commissioner of the United 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ccf5a4c2578a2693afc0ac493f987525243c02fc9a3ea2eddb11a2dcd92a0b. 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/1fc97672-8b5f-404c-9164-e50fcb9fad8b.json and https://artists.proofprofile.net/proofs/artist/1fc97672-8b5f-404c-9164-e50fcb9fad8b.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 0x278b2d889c75f22b6660031030e94a5d806aa5029f7a5ace28641ae4444a49cb. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USCC40600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980061cd74fb5c2a64ba18c3f0929e4f6c36e7dd48d10e28634afa5bd233778d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCC40600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17057e3a2f9ad364c8c18735e3093c6cb472c994c939bc925a739f866b59c864. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCC40600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc661d6ec0bc4e9235fbf3be5c6661761e10efc6919bbb5fc43f31b3e848b8d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCC40600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e312e802dc281641b2919ef0b56504bdb8f67267c3b8804c17a2d867ced323. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCC40600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1a8a21f3ca47d9fe9c1e9f74073e086ee0a53d1743a6a52cde4beadb2bf09f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCC40600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a50fec2cdaf4c4bb5932d44e371172491e4ffa391d3375179588adf9e61c87. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCC40800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31230dbd1bbc1c193840b3d6acabcc8580894158a411648c8014334bb8118dc. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:08:05Z), 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/USCC40800215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7256fa21c507004dc27feddfb4abfb1e5254f6908f5b9084b74d7091eb75184. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USCC41000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3f1266076505b802903134b8efddc3b1af433f26624b7b72b16e9324e6a3df. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCC41000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6489f10685114874eb3a455aa18dc71b3ddb922f8d1cb6e7d389f3b01c1ea683. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCC41000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b33aeb0cf0d9ea12c86cbee942c9abffbd0bcc675662e966a1ad1856587d75. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USCC41000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df790bd108f7b8846fa2e60355a3f48aa6353943fe4456370f2438dc8c7fad5. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USCC41300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a5de89ec14b6e2ac3b720cc0dc41b84c0a362960b452fad2290ef154658239. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCC41300126.
If You Could Hie to Kolob (Dives and Lazarus)
Lyceum Philharmonic at American Heritage School
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e416f60600a7259632294b4bb8cd6a534789c963bd9f60df9da9ee9e9e5432. 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/QMRQ61800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a41ea055e7936800029947b21335586a37ed23c5c4d0965b4e98791fd8c686. 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/QMRQ61800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f80ec60ff85de4536d94c8193825ba177e3aa3f2a3733621e34cb189ed4b802. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMRQ61800130.
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