Taja Cheek, known professionally as L'Rain, is an American experimentalist, multi-instrumentalist, composer, and curator known primarily as the lead vocalist and songwriter of her eponymous band. L'Ra
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 0xac3a61d0a7809b114d843fe2525b7478aaa0a255a9d6a18ef3e53eea023b8083. 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/e1888940-f8a0-44dc-bc78-26d57bf2a134.json and https://artists.proofprofile.net/proofs/artist/e1888940-f8a0-44dc-bc78-26d57bf2a134.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 0x8340ab9b4b82107d353264a87df74abf392484f03c938e202d8e7278e4f63647. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:32Z), 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/USYBL1701125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d23cb8647be933aaf3e6f90878d40380816454308cbe81310f9c54f114d476d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USYBL1701132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f24a34431db89de666097a66bfe95951114d16ba62d930955c2da083a4a9df. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMV8L2030901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3359c96282b10cea46fd7e23ed7f90cef1dceb37331f228c960fcf322c6e294. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMV8L2030908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c874f95227698364e3ab6019c814dd474f3ccfb1d0745a2b7b6cd1c3e07218f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMV8L2030912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e3546e588b8729e297d5fdb57204e3e2e998cd9eccfbf44bbca63fcbc47dec. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:03:23Z), 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/QMV8L2030913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e0ff5bec85ec3da003bf56bb003c08a6fc152b75f50462e862544788363fee. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMV8L2030914.
New Year's UnResolution (DJ Python Remix)
New Year’s UnResolution (DJ Python Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ed2a0b8f8c41e1c71965d3989e1fb4029477832328aca27e975d1ac166327b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMV8L2234601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769e27b3da2534f023c7778bfc5e24fdb4e952f8997a22a7ef690fa94e8101c0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMV8L2234604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e6c7364594487ce10b541546f4bc9fe4b5dea1ba1b8371616a5375022056bc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMV8L2234608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0000f17bd99ce214b867dbf2b5aaf4e49217b9d75449b210eb998fbfe8e77dde. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMV8L2234610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2397b0203ced39ca813e9af29b1ad0bb3091bf9632df6fc7367ec8938ab933fc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:05:16Z), 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/QMV8L2234612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68921382925be7ecb2f964b0c871a86b8b480fcced01b6602286a1a741fa5ba3. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:02Z), 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/QMV8L2234613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8155993ef8a6ce30b6d2cd389c9f15728f42eea7a5cff4330d2bb1cd36e4ff25. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMV8L2234614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e772440eec11636e0731325e078f660fa19ea7b4e92ed6489e7250680dee5f. 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/USA2B2403500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e772440eec11636e0731325e078f660fa19ea7b4e92ed6489e7250680dee5f. 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/USA2B2403500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec177a1daa527a43e39125a26d9848b4c53515410976368fe6498cb05cabe58. 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/QMB622402708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb24e8cf47f1022ecfabb732573a81b72a39a2d06b571e88f5104adaa83e61ad. 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/GBAFL2100386.
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 0x2c7b7de602e2cbd9b716778b9b86a11b35d5c6b8cff4c9e58044111495454f86. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBEQT2100079.
For the Birds: The Birdsong Project, Vol. III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe95659be0ae68091b952be74db07b2268d3097b5b47721ac6886924fde1e042. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM6N22234672.