thumb|Herman Finkers performing in 2007 Hermenegildus Felix Victor Maria "Herman" Finkers (; born December 9, 1954) is a Dutch comedian, who is well known in the Netherlands for his friendly, dry-witt
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 0xd6a0a144431f67c14a33144d35c023e15709cc42b31646a2a4ba5df82c820434. Chain 2 (Bitcoin): anchored in block 954097 (2026-06-17T13:13:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ac83b16-b484-438b-806d-04bccac13a1f.json and https://artists.proofprofile.net/proofs/artist/7ac83b16-b484-438b-806d-04bccac13a1f.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 0x847a2a9b19869beb0e7553d5d48c60c77495b8eb3dd1f3efbcaa7f787b393862. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NLV6V1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2dc3ba7f39b72b04c3da30a9f5d3fdb4a92a9e476c4b0c12e190283cac1d81. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLV6V1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b99871798664d16754603c83d6e371e853aaa47151b496368c3080784faa202. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLV6V1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2160ea4ce083d5fb85aae77c844d329d032831035d4aded126ddf4389917ea2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLV6V1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe2c89b60f282cf3ca50f073b10157abd46660bdf4f60606332be5a40f20bd. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NLV6V1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcda4c8df21d689728eebd0b3a6183aaf5e86e21680efa157948c3df6e34b94c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLV6V1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74b7c2e19a7c5495321780967cd01ad9e974efe0f6e31ee2e833eb85e213ba5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLV6V1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a756d2ac81c1d3eedf7f059a90e5fc003670f2c51da7237618a3750c944f5d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLV6V1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50519c911565c6a4cd849369f020a6c75b3859da26d84d1be62b8da8d519040. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/NLV6V1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637ae8259466d67c5837f3b4b4f1b958a2d51439edd235ab3b12540aaf40bf02. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLV6V1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2dcb5e13aab80a1e7c5a7bf0e0971da63af86a5af425cdf6cf4da047d1a2d7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLV6V1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6363df28ee3cacfa5b30ef44b97592edf723e6a6cd499be2ce0fa7f8868516dd. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/NLV6V1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb729232461690ec66fc57fa56a660a38f27f50ab423ebd62669fd4a0820f119e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLV6V1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aacd459571467b5c8dedfe0dec14703351ed4e5e0aab2aab521a2cb3d62c8ce. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NLV6V1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6a64db40166f955dc6ff79feb944f7bc6e4d125fe1d173f8211c9a31340fcc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLV6V1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66368a7dfdc9d4dfddb32252534adeaaf0780dcffc17439c6e9acca14b682881. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLV6V1700016.