Roberto Carlos Lange (born 1980), better known by his stage name Helado Negro, is an American musician. In 2015, he received a Joyce Foundation award. In 2019, he was awarded a United States Artists F
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 0x41c54b8b3e9b6aa91b986e14351c5f10d6305d3f601e5a78661addc51cd65941. 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/3a1f66a7-6ec6-4bdd-b1cb-0459b31288aa.json and https://artists.proofprofile.net/proofs/artist/3a1f66a7-6ec6-4bdd-b1cb-0459b31288aa.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 0x0abb7a9f3290e19d4f1fcf1b6006fcd34d32f3625e1e8cff262b99b67a340e4a. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/US64G0906503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb119598abc2e8ff5875540f470e31c13c9697c0e1b294459bfcfb8ae09ee4a62. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/US64G1108306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825259cc92a6c2fc7055efd6f7362a7eb939f628072d3f881932b2f933268643. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/US64G1309501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344973ca57ab4dac5d7467aeb19a48256d43650a940bd20ba0fc2b681ddf90d8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US64G1309503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6684661c297684c5aa853da786d455b00e656982236bd2f10c9ffa07e266c95. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US64G1309507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16a4f346f2dfea6a1e2386cb6903dfaa52919c9fbc2a5dc6a5611e9d0faf41c. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US64G1333705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bfda724c3847babc2681a37aea8c0a3f37c92f425afdd6fae14b56a3df3e64. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/US64G1412002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf7bf6dc6470bbeb063db1488efae926f5ca153e870ccdfe37b1ba9369278d8. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/US64G1613104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90246fcd36b80fc1f9f0e460bdb52cad2e83fcfdc6cb94357c2da46fc10ee021. 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/US64G1613105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653f6dd4388846922b65f4c3e489af37d0ce9376b8553c769bbd44029c5789c1. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/US64G1613106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5de18442764ce1148a5f7258654eaf5368070352320bdbcfc6a1015532d55fc. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/US64G1613112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31594db8b38191e4b4cb55b998bc360f0f6f5eaba19545f947981c90cb0ba397. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US6PQ1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c026621219a61a38e71a71699bb406b777928d8896ff0659229f1853c0bbbd1. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US6PQ1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ff0ede39542695ea4fa2a305042985c94c949a813ad8f8ac9300579424b3ed. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/US6PQ1800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f96b02ded6954b152c463f7337b935eec5953ae6472b86be3bbcb8069646c8e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US6PQ1900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7083422a7d13ddd872fc69a331a2a5f67aabce2442e4e9321505526b4489ce44. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/US6PQ1900191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac721276d24846335792a2b1c26d967c695b0d2d1dd45a471be045ec827cbeb3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US6PQ1900194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaee84d1b3fbcdcda1825208fba06fc02d304fb2197afc07461addd30b652d73. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/GBAFL2100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7789ccde7af1f0123758bba45da8d265362a6650cc1fc51838f56af872ecc80. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GBAFL2100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179d1d6890b42b8eebd093ae707b055eeaeb823767520efc382ed7593730f2ee. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBAFL2100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aa0a314deab84001d588e79c3c98ba8b6f3ca8609eea5f4ee6babfa3825d51. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBAFL2100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8051b7ede2e2f483787bf1219d6037cbfee873e3b8185872f85a5af1ea240a84. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBAFL2100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90ff8348356337c73794c80a6faa218aab6cdbdb317413d5a013cda4ddb094c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBAFL2100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdec8ef4a51158e89776302239adf418bdb2e98d344c2a7f1b7457ac4b5861d. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/GBAFL2100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1446b06bcd7d20a02f6adbd51401250dbc0ada2518f3d86d4aa5ed0cfbe5c0f8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBAFL2100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07342a464689ba3f47b24e5af957405b3e5773f58579f9320586550a6bfc2a12. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBAFL2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb140e6dacf3430ae3633b441342e34336be39c531689ee2fb901b6e70fefcf9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBAFL2300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13331bb9cb9d748255392978fd562b2df9cedcbf2699f0d6ccb58e63e002bb1b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2B2404188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9878af7c0139f9060f1bb76c8ed199f0a07d60e20786e641420969ca8528bc9. 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/GBCFB2500461.
Sylvan Esso (10 Year Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9eda88a34efde019ea27404c83a758f3117a66e6f471a4d7671cda9ad1a6ae. 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/QZPKV2401203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13331bb9cb9d748255392978fd562b2df9cedcbf2699f0d6ccb58e63e002bb1b. 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/USA2B2404188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12327ea9b1714acc11d7bbb20fd359f2154f53cba3029bf1d95d0b102ab1376. 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/US64G1109103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd28cbf6ad1619fb854240344eb8a8694406f5cd6e4dba32b878f6b5935a357. 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/USNO11900470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd28cbf6ad1619fb854240344eb8a8694406f5cd6e4dba32b878f6b5935a357. 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/USNO11900470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053a94f5cc62c3df6e47a4af69e4c4fed3623f7c82cc601ebe33a5541640103d. 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/US2S71801028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d72fe2227f37f9343b0fbe623f7a8bd51ffe5f038c3b3ac3be7b70e3f08796b. 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/GBEQT2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa191a39beb64792ad7e45417f98ca4151687c28173103bbbf827df21c54939c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBAFL2100046.