Malka Spigel (; born 19 July 1954) is a London-based Israeli musician and artist. She was a founding member of the Israeli-Belgian rock band Minimal Compact. She has also worked as a solo musician and
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 0x1649e76b8111413cd2771a85122e74742a7aae9ac89d71e272a6950b393c8889. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c159d097-4627-46ef-8599-24e6200bf1ec.json and https://artists.proofprofile.net/proofs/artist/c159d097-4627-46ef-8599-24e6200bf1ec.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 0x18910dd28b08624331a3883cbbdd0bc5bc8f80605b66037b36f345adaf65e1c5. 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/GBJLE9700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0f6f1e31b70258569f574578fea61d9258414e8939ac6bb8318c76f8a6b56e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBJLE9500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffe18f4fc08aa38efb0147fe2ce66f81ebafd2394723912d7de69d36f0fd8af. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBJLE9700302.
Slowfast (Falling Down the Stairs with a Drumkit) - 2024 Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc317e7256f0ddd24cc73cd62d7a7ec87f6efd487c1de0148af2350c7ab749722. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/GBJLE9700303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443a32d8e59a14c4b2e902f67133623fdb4d25a28ecfcc03dff33e4bb7359b45. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBJLE9700304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86bf033cbd2a2e43cd811da0e64f08a51e7646ff66ac49a904ca2979545c208. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBJLE9700306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5348590edbcb72eb5b297e65008e1b8cdf02c4598a9abafbfa3abb2bd57e939d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBJLE9700309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7171ce95a6d832df3c096fb92ed833d6bc96443a0d7889dbca9a8cf25a6a460d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBJLE2403001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d4db0231abf45395f54df562a3059dccaaee6b76afef16c9f2d96fc0e17dc8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBJLE2403003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6913a8b0effb97dfb4576159e6fbc65c20c4394f8a62e088e58a1b2ef4f7b41. 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/GBJLE1307001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09703a57883de12d04f11335759affb0e3c1b6d02cf8c884fcd492adbba207d7. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBJLE1307002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f60d049a307aa476186f7bae3e0067bd8f785c6f19b71c60b48946c649417ac. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBJLE1307003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc724f5bebb90dcdfb764c415257392e1303c1f50afdc926f92a4a4a3c1254e23. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBJLE1307004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4ea46838b8ad9646f0b9ef4151031e9079c6523836d221e633801dc21436b8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBJLE2257003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212a2579d6904c5ccf13ad548f847d0ce6e62cd4c87fee8ee92ad0382dd29e69. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBJLE2403005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ccceccd2f58b9b50504ebce5d4833276119a833b2a389e3a8c8c31bd038bd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBJLE0103307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fc250e5a26207a12f8aeb2be009160ba3042682fa82e94d02fd974bdb119ea. 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/GBJLE9300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eafbe35f705d6df06f54434d5fac5050409067efb32b2a928155f0a06f4b33. 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/GBJLE9300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e15f340a3aeb4214c71ee31ed97acae68a61e1aa43e1961b7aaf314abffe0d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBJLE9300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f506e6e2c5930d71da9b8f290741e044922baa10d5389594aedf32fbaf997c. 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/GBJLE9300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f1acab756db975675aff925f96f755c532844cb2b3e78ed68e24fe33b40717. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBJLE9300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294a7c7d544491b5a5ef484aae553552ee8dfb1b38448cfac59b3a5930ee56bf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBJLE9300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09703a57883de12d04f11335759affb0e3c1b6d02cf8c884fcd492adbba207d7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBJLE1307002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5ec3e2ff996390626623f8b2b3a34778b9fc23aa8e23ea97f2070867bceef9. 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/GBJLE9801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3903412e96011b213cf38d031cb6312efdd3b0b3b31ca3b028731f7d37f0fa3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBJLE9701004.