Matías Valdez Sastre (Mendoza, Uruguay, 29 April 1995) is a Uruguayan singer and composer.Matías Valdez cierra el 2022 como el artista uruguayo más escuchado de Spotify y con un show en el Teatro de V
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 0x831ec52bd0d2fc2baa0352fb68f393a6239352e3031a2270dfae7f1f74a0b548. 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/206ac1c3-a9b5-4034-81bc-7c92c9b2afed.json and https://artists.proofprofile.net/proofs/artist/206ac1c3-a9b5-4034-81bc-7c92c9b2afed.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 0xf9302a8d300665cffa79f5c51972e9211d043ad0418033226884e80171060873. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/UYM123000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51e687654463a37e5e25af68cc1cf78573fc7b5be13d42135cd1bd546980ead. 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/UYM123000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f07d9bc175736743a12a1003d0e01e2afad61127c53557cef9807ddf9c8f03a. 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/UYM123002558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda68a42aed4dbb986995b178673e5ed9ce1357cb45ba9f88268f7015aeae1f2d. 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/UYM122400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4914e5a2fe84ccdceac0dbb2e1f3b948295857b6f3d782e4219ef94bca1e4f07. 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/UYM122401087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420be73994f5991fa87692a56df62450723d3c6c4489a210dcc649606b4a13e2. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/UYM122400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb642859ba594349fc4de7a88557a5ef3cd71b2730cee4b726b7a7699ade272a. 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/UYM122400706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b0cd5576db451b9275f66be7375a8de7148a858450007f234c5354c3489334. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/UYM122500579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e801909ba2cbb4bb703244bdd3561c20c567af443df260d4e55f7f453c4872. 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/QMFME2312909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fa2af3e17918a6104b5661afb70bd0ef974c484c121344ad3d4044ca55a573. 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/UYM122400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1820d3a168b3eebb2ab9a381a25fd811dc941ce1055642da68b9978e256f8483. 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/MXA332310333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1820d3a168b3eebb2ab9a381a25fd811dc941ce1055642da68b9978e256f8483. 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/MXA332310333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ecf097dd94f28efd7bc74413f33b12fe4342e15510d103552aac4bc55c1520. 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/UYM123002224.