thumb|right|260px|Gilad Hekselman (2018) at Aarhus Jazz Festival, Denmark Gilad Hekselman (; born February 3, 1983) is an Israeli-born jazz guitarist. He has performed with Anat Cohen, Mark Turner,
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 0x97f97eb8b94650fd53308be10cadc6c599e6444fb058862f226a52deb7dd4220. 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/197fdffb-d67a-44c9-9bd4-9ff9b576010d.json and https://artists.proofprofile.net/proofs/artist/197fdffb-d67a-44c9-9bd4-9ff9b576010d.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 0xd3ccc76917318b16c8b45b26355413eb24521a5347e4f522f2ab492eadfd24ab. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QMXBF1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5196f8eb5548c362d42aca23ebef9a5dd5304999c8682420d92e758608958d96. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMXBF1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc19a3df63949dceeb4c289d86cdcdd59143d8f82b2efc8004ba3006517a6e2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMXBF1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80e26a66740332bd2edb970b7b193b69a7f9943b0f93d7f449771609cde9c40. 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/QMXBF1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa7193c6bd60cc20201040e93471c762922351cdccb734a08735d7353cebfbc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMXBF1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec887ede2449cb4b126c7a07116fb3c409e503faa3de110f7c395c2f2df99cb. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QMXBF1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1b31685b3fdb3b9dc51fd45b59fa50bc918eea34692a80da90858c7bc0c6ba. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QMXBF1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4cb713e3de8f17cf2987c33b4d7b7d8822baca83e234202943161e31ab5245. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QMXBF1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd37158edb40f9c5f128308a3e28ced888c5b45e642e45f81d950ac8260e3e2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMXBF1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e250f8954ef6b67f56d8e6e14fd14dd8162061c6c321bb8938cf39ea10287. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QMXBF1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e250f8954ef6b67f56d8e6e14fd14dd8162061c6c321bb8938cf39ea10287. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMXBF1800010.
Fast Moving Century (feat. Shai Maestro & Eric Harland)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5d1f381a888edb0abcaff0cbf8348b69db0f22e433b760e2c05c942d4ee5da. 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/GBVEV2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8558dac33a7fe64f9bbcb86b4526cc8434e11f3dfbeebff37f58cd87416f04. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM4TW2430768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb71e96eb9001e26a41cb966932ce4b3040bf0c8fa2c7258ed657bb9a5e7f808. 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/QM4TW2430771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875d44852476da40e7d8e2f94ffba1071ad86838b701714660ba8a9713b55980. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QMFME2440974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b76673c357cf0b17d81d2b6d189acbeb4bc03911980042120173510fc511ab3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFME2440971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd115738e1b8bbd43e5ca8680301e95c65678a2337c00e3da7eb16c1cc25ebc. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QMFME2440970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b76673c357cf0b17d81d2b6d189acbeb4bc03911980042120173510fc511ab3. 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/QMFME2440971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae62ab7836d965efa9d51f87ba678b69f4bf3a06cc485eef691b2de554c21f2. 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/QMFME2440972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d608c2227f7228115b92876fca5de4cb9202f4b1f36aa14274d74881d54728f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMFME2440973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd531ea18030d74e5b080e5e06a5bfed8d9400698956f868301e14faa745a18d7. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/JPV752104541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03013fce60520343be8bcb782dec2211635afafa9a7ab91041ce95ba8d852331. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM3JE2302414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd555fdf01f02bc58136069a98ce0593b201b7b721225d5311274e69fdfe93d7. 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/QM3JE2302416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088dc83cfb096a2549e0812d9c391743e0e86e730e684092c8f8cab45f81e691. 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/QM3JE2302420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088dc83cfb096a2549e0812d9c391743e0e86e730e684092c8f8cab45f81e691. 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/QM3JE2302420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393851dca75e9765a5a4d293c621372204f6cf3ba91227d7d9728a233fbfb0f4. 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/QM3JE2302470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03013fce60520343be8bcb782dec2211635afafa9a7ab91041ce95ba8d852331. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QM3JE2302414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd555fdf01f02bc58136069a98ce0593b201b7b721225d5311274e69fdfe93d7. 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/QM3JE2302416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a1b726f5bd4ca2cd27fc05fafa942878433c52a59f2a99e4b6698ab544273a. 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/QM7282496017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf123c0a8c6498dca61062a4cddc15f30e2d3a7006610934f50c9d7800e4d6a36. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QMBZ92404606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279013f5d27766eb8af0b7ee977a34504c43c05a28f800a4d394bf4c7a040287. 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/US92U1904455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49b7eb9e80aa21c0ceb972f195fe117d29e123f2b89c863e57eaaddc9ff34e2. 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/USY871400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bda71d9f222d1c6f62a40bbfde20668d58e65ade61275e3630722035178f880. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/IL6721700694.