Papke is a surname. Notable people with the surname include: Billy Papke (1886–1936), American boxer Paweł Papke (born 1977), Polish volleyball player and politician Ulrich Papke (born 1962), East G
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 0x4d59ce598f29f41971815bd4e1f5e1a26a8d2bd4a5ccd9aafc809b10dc9087e8. 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/bd40b0e2-e8a2-4f26-bfa3-e79f1fc1f18f.json and https://artists.proofprofile.net/proofs/artist/bd40b0e2-e8a2-4f26-bfa3-e79f1fc1f18f.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 0xc9efe4ef50a78b365901665f2c6c351be3ed61c9026c1759e0e9132477ccabc7. 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/DEZC62441936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270246463a3a68025f78e4ce3c6d337a673cde396c3dc91b0c89cf1b192ceb59. 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/DEZC62367902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604d7843526dc68d577536cc3c969a8e9eba8b3f8fec5f8611893528d3f8ac46. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DECM12235703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d4940e1f9c23b80b1c10e460c73205e6e491386d709141b1da2c66d666063c. 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/FR2X42380620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546ac28c2354d80156be9598d88b7bf0d2960493f89f36d5fef9f5f86cdd21f5. 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/FR10S2336052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9bb5f4ae38fda1b22fa1f3a7a69cd96f7594b0188b6ccac77b451773544eb3. 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/FR59R2349803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606c62ef8b0b4dfc921ee2b18e355f954aa348b19e2c34fbeca16c681de84cdc. 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/FR96X2328820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69044df971fc4c05c1c2ce5c55e64fa452ca006143a4a35ac488ea89aa2ff5b9. 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/FR96X2328821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9da62ef0277708d687642601d75e44bb5e3c477a39b6652c4978f30f6e3d8e. 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/FR96X2328822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78c7a19cb6fe78bbca127f3719734e5c8ab873f1c4c64f434847197df484867. 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/FR96X2328823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04ec96e243794c0285641131e68c51c96b48870c420e3a78cf760a879ba4ae3. 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/FR96X2328824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e6c95651cc8ae4fc4b99284a328000c81b3b3094095f70403ede048fff7ede. 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/FR96X2328825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7503c4c6f51b1f258be0c98bc0b927bd8d4827fafc715c02b39e6e1589b2f0be. 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/FR96X2328826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371993a27314fa78026c72593fdd3156eb10424c4145a6b4892847c445e9dc69. 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/FR96X2328827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec3b41a00fb84478930762297e2ed5a91f7c1bc69916ca6c6d4d6b5752b03b5. 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/FR96X2328828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435d3e0161743b54343fcd3541ae956792a1af3608114d45ff3b5252a7dd0ec3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR96X2328829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304efa28c6f648d992627b11f1c930bfb24ec85e7f6a62dfd1709a925e6ba0e4. 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/FR96X2328830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024debb57d53690cb1d26d3538c8f30a1323878651ff9a2bca3e313493b8d7e0. 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/FR96X2328831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea0e745d3a0b72c49e1a820aaee189e2cd8393156e0500ee6f2fa73cff7b281. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEXN92378387.
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