DarkMatter was an art and activist collaboration between Janani Balasubramanian and Alok Vaid-Menon, known for their spoken word performances and queer/trans South Asian themes. Background Balasub
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 0xa0eb5d41f8055d498d0056f8e806d841a27a1de21fc4d221a1043fd29ff05828. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d07b04e4-1997-4a20-8fd2-799fd5b9f73f.json and https://artists.proofprofile.net/proofs/artist/d07b04e4-1997-4a20-8fd2-799fd5b9f73f.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 0x8a3d3172c9c0db44668cbe9eeae4b70337ffe4861246e190f609dc8c2d597e86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA62318190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd577f8f6be3bab06c7e2d6f2870d70ea3238f38f2f1ec8918a75fea1f505ddb6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB92289301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1e4c9c616b4da5548850825aa8382fe4f51164b51eb9fa33d1747f07168ec9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB92289302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f58ddb7e6c2c3a04f8acc7651545ab9a51554274c611c11c86fbfbb33c47142. 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/QZRP42255642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f58ddb7e6c2c3a04f8acc7651545ab9a51554274c611c11c86fbfbb33c47142. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZRP42255642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6f793554a7ee9d9a0781f7aebebda251d74863860b00e19d021fa9a203703f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ22246729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf20c695dcd086ce6c67ffd0a1b83b915e1f01648ee3a23167294f731bbce598. 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/QZFZ22213307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1026f1053a1f45a132f6dc7d9a0a3daeff3922274f9e6d129aaed40336e35b1e. 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/QZFZ22246730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e9e4c92fa9589ee785abccc387157f9994f50e20695deb874bc4fa1e3cc0b4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNWS2148730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f5fa25ee4f70402f7e4a3e51f11804059ca049d675bb78c5becc465a50afd5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6P2197129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf20c695dcd086ce6c67ffd0a1b83b915e1f01648ee3a23167294f731bbce598. 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/QZFZ22213307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f5fa25ee4f70402f7e4a3e51f11804059ca049d675bb78c5becc465a50afd5. 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/QZK6P2197129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e9e4c92fa9589ee785abccc387157f9994f50e20695deb874bc4fa1e3cc0b4. 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/QZNWS2148730.