Robert LeRoy (February 7, 1885 – September 7, 1946) was a tennis player from New York City in the United States who won two medals at the 1904 Summer Olympics in St. Louis. He won a Silver medal in bo
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 0xa4dce4a3efdd6a9b618c212a6a82227ff01aaeb5744f4c5337c4565175e5a8ac. 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/d59f1a80-b17d-4c7e-9b78-127b6a3bb6a1.json and https://artists.proofprofile.net/proofs/artist/d59f1a80-b17d-4c7e-9b78-127b6a3bb6a1.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 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 0x3c8e61c65def2ffe6d5fbe6d9f05953a1c5ff02a3acf04b15a6b0fdfdd338f11. 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/NLZ781100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5664a6b3e9ae2f872bcedcbcb906780b747799c543fc7c42d341d4bc154975. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLQ270900047.
Geef de nacht maar de schuld - 2009 Versie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3374991ed6a63cb7ee350efc04edb6b214529a9500f6a62d9322a1639c823dca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLQ270900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63271062eeadf666ae5d3ed2ab137f1c3c063b18d37e15112caab0370f3926fc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/NLW2R1705640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf885f2367f242200523090dac301aef5ed1c33b715dbad49feb5c3f3f32c1502. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/NLW2R1705641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf682c178f0d2e1676cb585473069ec6b6cced5be79eac0f8c1981e5656dbc4d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLW2R1705642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3be6428bc9e576688d53c55586079389066a8263d99e75da2503436de034d88. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NLW2R1712586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2590b524bd52ba57cb23fd88e72fec976f92b642929db71f9cb59631f7829439. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NLW310100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671d707282a776ce8942ee78b4a48d19fe860a39ca3e4174a14b409ce9b2e207. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/NLW310100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cefd819236ea2e25252257936242ffeff033e1cc2d13967c7a3aa5e7d452c2. 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/NLW310100011.
Sinterklaas laat ons dansen in alle talen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922b31ce8f57dc285e50370f0c89a831d28cf532360428f5d6a87eebe6e92da3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NLF922300419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290af89bc5c4134169c78604f8262df5a59b6635401f1ab68d6fb2fa0d00932f. 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/NLF922300417.
Robert Leroy Presenteert - Club Leroy Live 2023 (Live In Huis Ter Duin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26c927741724a428f77f1bfe5c6ef507e0eaa1b1b1b2c8e95646e01429889fb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/NLF922500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aef586a176824ce49d18dea90f40a3b1a92b23deb8b329094538d47435dbac1. 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/NLF922100321.