Tal Wilkenfeld (born 2 December 1986) is an Australian bassist, singer and songwriter. She has performed with artists including Chick Corea, Jeff Beck, Prince, Incubus, Eric Clapton, Herbie Hancock, T
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 0x805c3b657450fcdcddc5d1d65b7a9b0cc30ff566452edf9849909c63169d9b18. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5d1ad32-f0ad-4ee4-b03a-635f47fdad56.json and https://artists.proofprofile.net/proofs/artist/a5d1ad32-f0ad-4ee4-b03a-635f47fdad56.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 0xbc6e01f3c3b6cc5922a034cf1758ac2a4a957a6b391e8e5c282923acffd0a2b4. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/US3DF1606236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13d4c32926607dfd0785bd562de957927e3ee70fc72abc93a7d957bc4c7df04. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QMRSZ1802127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7d5bc478f8f76e8e21021c99b77e3a0d7369d99ec0c3150e984d2958149de9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:52Z), 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/QMRSZ1802128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5412fa7bc9740c290a378b0dcc3a6b6eaeef35b96b864e70a0e5a06789a0fec0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMRSZ1802129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbbdf7b3baab5677312a3d36c4e2a69cee0c8b8450bd2052dc4206a0306fc6d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMRSZ1802130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474ed56f1e9b75f509d236a8fbd2586edb79141a42a091f59fe843f06b57d103. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QMRSZ1802131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa851cd2125cd9984777410556bdf9510dd07d57093060fb36ccf60cdb073f8cc. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QMRSZ1802133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29ec4ba3f9f247b5f90630cd352fdb72a12e8318fd6141264ea213e89852f8f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMRSZ1802135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4ceb0e30dc93988b764ef98e67dace6c50d13297b3eae421243d57abaf35ec. 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/USC4R1021577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754ad44fcf8783ddc843655bdf51497071b1ad9e9d0f2a75cf28a81a6ad2979a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USC4R1201146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b86b8c26ceae4651dabf3518ff444e7bd19d502867bc9639edc5c0a9015f790. 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/USAR12300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0c3ac4b3e3166b3085cec39f1344235c2ef7411e2d023e3d31ae4e719153ad. 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/USC4R1201148.
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