María del Rosario Graciela Rayas Trejo (1943 – 21 August 2014), known professionally as Tehua ("you" in Nahuatl), was a Mexican singer and popularizer of traditional music. She was named by the poet J
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 0xab527478bbed98b7ac1d9ac802dfd7f5b763f6a4f96c4f7fdf6520fc7b9cbbb2. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bb7c7e8-ee2a-4cf7-a018-d7d00cbd2d5a.json and https://artists.proofprofile.net/proofs/artist/6bb7c7e8-ee2a-4cf7-a018-d7d00cbd2d5a.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 0xa3171dc05fed7cb98d6fe1a5a0d87a7e2a568b6ebaf447175703360a6987ca38. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USJE61303968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0985ff07bffa968ac35c1111e8de17a12d8cbdffaf5ca10d7ac895c08d3bf117. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJE61303969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e176c9014804a59b181001ef9ae4b586a42cfadf2d2c0462032c53c29665cf. 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/USJE61303970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4778230e7d3457875d73432be2f9d214cb438c1ff0ed4c33787991f76104979d. 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/USJE61303971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9315060e68bc143e0452a94ea9aa448b217a818c6817d10f079606d6a71bc19. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USJE61303972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fb0196a462a86219674cd700ff09b9acc018d94424711bf5922eaf822ce722. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USJE61303973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ca69c01e2e212bddeab5ce39b4fec4560c7022279068ec60e8c69ffaf5e58. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USJE61303974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1788455e346dc86498cfce6664e5b814f1acb7d08196d9823b555f8a2e87eece. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USJE61303975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e195b472c889b9ee978213ddebad9f60a5dc2a664afe907344d340e5769ce58. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USJE61303977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff1d3caee2e1b97ddc8ef3c2444e694277c3096c2029cf3ff48fe5074aba614. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJE61303978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b597e53634191fadfc4226bb7f15cec2efc1afb4acdcf37e7e6b3d6a6479b5c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZPYN2382197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc435e25f5a602855f6f2783388d75967607f25c61f341a9c7c318ab043e8b6c8. 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/QZPYN2382198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e2cc0beb5ab145363ca49f66d93169aea330ca535f5694f76ec54d8eff02b6. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:08:14Z), 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/QZPYN2382201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218d7224153224568530fcfec734e8fcb6f3ea5b2686f5294fe36c5a8cc85a05. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZPYN2382203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c1af39e38b644a37d32a120f40e8db7ba575d7855a00c16d41b282c17e41af. 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/QZPYN2382205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ef14fded7c356352107ac48a2f569981b0904614665920a2cff2211adc1743. 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/MXF110210287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ae40d2d45955742cc5fdb97bb9e3449d226e9ea2a85b449eac7b8849ba1bf2. 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/MXF061300033.