Elena Torres Cuéllar (3 June 1893 – 19 October 1970) was a leading Mexican revolutionary, feminist, progressive educator and writer. A member of the communist party, in 1917 she was the only woman to
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 0xd9f539178787e6243809682a24f119f3b478fd9d9750b3d560b37beebe7cb4ef. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f77e6762-6165-46b4-adb6-3b0f4f932e59.json and https://artists.proofprofile.net/proofs/artist/f77e6762-6165-46b4-adb6-3b0f4f932e59.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 0x55e6e77e41ee450472907bac8e8413f592e0c8c1de11aea810f9f5edb9b00bda. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKXN22447833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb066974df305bf3660ba1af2a9666b10cba2b42e22e4304f618a99ed7840bada. 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/QM7282435682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3de201db7febcb088b504e53138eb0c82bc6e38110c169de5f528627bf368ad. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBLFP2437915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef83466c6028a169f2cb89e94778c5eed38dd6ad1f2e91bd4c688354c4e12ab4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKXN22352258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79f399bf44d748a5abe22f16958b3cc95fa8998810575f2aeee8c7639d9e66a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX3Q92349288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7193edf79308b144a7ea4de5cc76f386f8ab8373d4e506717dd484c0f78db06. 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/GBLFP2285028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaed35838cbe6a2fbb2975d578468a5fd0abb7adc121269ae031d16b1e4719f6. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GX53U2093280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d5098e2ecd6589b012d28f99b5a2115bf85325ebc10b1c2e7a00944760f8e3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GX3Q92114408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb89b68567edd9357161ceffdb5a09447d2c13d958054b537961634a2e7fa1b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN62191855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba7e99e0172ca33954d95a46d1fab0f3d7f7364e0c8d70b3aef6feb58bf028e. 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/GBLFP2115552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0cb45c3b32976042ebc7610ba46d99cafc05d05a6cdfad86b2a67e3f6f4dbb. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBLPF0286621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c301b1dcb1b16d5ce3a094920f4c306a35ee4cea2f5bb7bd02bd06d290c65c. 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/GBLPF0254376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd94530d67623357ce51c0986e66b17def87e85e0b9892536888ce73f6b2c2e6. 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/GBLPF0251967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd72bdb7f5249d86870da515d947745914e3aeaa739338c511bd7ba53bda51e8. 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/GBLPF0247191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8186f301b7d5e003b8aae2a3da13926bfd895164d5c2875a3e76c14e20107f83. 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/QM4TX2261780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569c34aebaa59f4d9297983e237a7eef5b6d956d00dbdfba980effbc5d06d51a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6MZ2279395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acf993a385acd878ff315cea948a90493edf0ee45fd2717d1fdbdd580c00432. 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/QM6MZ2272561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932845d79e06e53c780ef323a53988afced5d0d1317216ae8d62fd437ac8e800. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QM6MZ2270169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d8056ac1e0a423c508599d464f95a984c33ae6a33878ba561fd268f31929aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6MZ2279396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a290869c53aafe55a741b22bf0986cd4b3d2293351d734b8752cffba26e7806. 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/QM4TW2200906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bef5f81461455d4f87d8187690f670537368369e8f7245bc8f0f28d05273e3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM6MZ2279397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cf376c3c56fc5bf03c10a6770aa153e95a40caf499781150a61e73ac631f51. 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/US7VG2506826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb011a2d0e58e61d9e233d4cb58b775698339e88b3f0d68d6efc2731113ddfb4e. 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/QZW9L2455425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5a9aa76a0c822f6ac2d283e0a3aa8bc94d1606cd0491792b201ceb99f6e52c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBMA22330760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c08c972b1a48a48d0d4f76fa52c5b832a52277d9afbc3828d4e99b11ab6a012. 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/GBMA22304927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9aa60f0d266604981ac77759c92889600df47fe7911470a409125fead2cf8c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GX3Q92393754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53793e70bfbb91bc1690b61069b3c2387a9fa2b8fb8fda8fef831c969ce9f958. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLFP2439433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb69cc3e3169b70f0db7d932d29561acbd14191a7b8b93994e7f256f10103d7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBLFP2235359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faa1054e5b87078f8331d24524580deb43c526bb39947f0baa69a9a74330869. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/UKXN21968757.