Leopold Kroll (December 26, 1874 – March 5, 1946) was a missionary bishop of the Missionary District of Liberia. After studies at the General Theological Seminary, he was ordained deacon and priest in
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 0xd471b1adccf52ccc2bf7d4d4b6cc2159e2587619b29585b081a0dbcac7b2b13d. 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/5b59e8fb-a58f-4841-bd6c-1868fd2d95a3.json and https://artists.proofprofile.net/proofs/artist/5b59e8fb-a58f-4841-bd6c-1868fd2d95a3.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 0x75792f306d0b794bb7d8dcc36017742711a0b51122cbfd4f7c2792a01977af11. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZB4J1858160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8d8ece968480e7dd34b3666426ae519e866f32c1bf36dc44d4edca39741ef6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHNA1958849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7840944b1325d5676c4fa74300f4d8d7ba022c62a8d5f55181638b29923647cb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYY2025260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b935c24f80847f244b73450fdc46cf71554bb5c0b0beb57e57195d7a5e51999. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZGWX2050011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097a707abbcb844f3d9feada620cb5e388a06a6ca5badcbb888c2d08ee015a5c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAT2110950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b0fd77d007855c42ef197bf0a700adf1c4657485fe01518c6202d115e49b9e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:52Z), 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/QZFYX2397958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18750f2882b98e36787ac43d8cb4097cde141d6a9fda381724be492ca1e9f363. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA72379933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59866bdebe44187ca03b280bf14c72c7e7f3317840422dc91c90b3095127d1b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:46Z), 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/QZTB92310431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfae9ba0dfe9c7a37832734cb768416b859033718bf5f30972b24754f378851. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:05:45Z), 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/QZWFN2394747.
They're eating the cats They're eating the dogs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaca20a655237b9883c436a1b0dffd400e290cabd9edae7e511408e1982c180. 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/QZTBF2489791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd5e501d830b4dac148027b5eeb03ac0ef9fe057654a425db98da62c43e73d1. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZWFE2428391.
Scream Like an Electric Pencil Sharpener