Liza Lou (born 1969) is an American visual artist. She is best known for producing large scale sculpture using glass beads. Lou ran a studio in Durban, South Africa from 2005 to 2014. She currently ha
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 0x265e4f964abccd94d95fedbde987b240d848447d666befd044ae154be0201f66. 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/4777535b-1f45-47da-99a3-7c8dc63a3b76.json and https://artists.proofprofile.net/proofs/artist/4777535b-1f45-47da-99a3-7c8dc63a3b76.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 0x6580e059033ead3b55438223778c5382e3713d12a596361c7b75b358b671ebcc. 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/BX60J2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b421c83ecc1d1a3a5480df1aff8858dd0de90946d2bcbdfdaba5c171c81a105. 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/BCIOS2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd24c391a3ea00cba5fc89cc9d5dda4a3d3478326c8099e5395c7446c9c2928. 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/BCIOS2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe3a7b0fdf828ab189eaf4b664d119435201e9edc9029267012405c98eec50a. 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/BCIOS2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa904c8dc32596323c0407f94c58898027f04e46e921df9c6a465fe214ec54476. 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/BK0B52400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0a127381706cfbb865ab69e9ad4e4070a50a4d1c65061d272c5bf6e63a03c7. 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/BK0B52400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0278c8e4af0af99a9fd2944cb8943e4b41015d874b53c27b7e28632f05933c38. 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/BK0B52400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072528d4282742f59b49bc942beba03741e3e0bdcd726766a6c2b40997b0b16e. 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/BCARG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072528d4282742f59b49bc942beba03741e3e0bdcd726766a6c2b40997b0b16e. 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/BCARG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14117ba18794332df6e59d034b91d0cf1d9bd35226bc387df3eff046f33021ac. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:29:04Z), 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/BCIOS2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d485df8b8dcd5eb8d8b87902e0806772d72fb9eb236175f638ee2abe6b5035. 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/BCIOS2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25006fb936b93e6ab302b01f450741d5e83eb19651cd42e889ec11374d7c8cb. 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/BXXIP2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542c2a77c141cd9eb4d8bb8d05459a3e8b365eabccd766b8acdcd13f582d66c8. 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/BXXIP2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb528e5814ab61f7e8cb1902f13b729dba1e1f6efa8e429374b3a5a63bd0c5a94. 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/BXXIP2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90137670f3f91dbdc63759e30a92f0e539184f662efa43954360ccf96640c1c7. 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/BXXIP2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f98d6054c888ae0cad11c7958f3b5686f4256212aa713ddfdb00b0a494e5d14. 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/BXXIP2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417d6148c96e98c184852c2d9460cc436ebaa525278643a5416cb745afca0110. 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/BXIV82373680.