Mariano Alberto Martínez (18 February 1918 13 April 2016), known professionally as Mariano Mores, was an Argentine tango composer and pianist. Biography Mariano Martínez was born in the San Telmo s
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 0x8707b74517c5042d6c185f82491ca1049d22eca4edbc1a76b600d1bffc8f8a65. 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/1f3c3432-6600-4d1e-aca0-851add14da83.json and https://artists.proofprofile.net/proofs/artist/1f3c3432-6600-4d1e-aca0-851add14da83.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 0x86dd054d98c9801a66ed3dd6813ef6bb78566021338e2c1f896804ce9933b406. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USV351336412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a17589f4ab2280b0db712f1dd490e4c1eb66df4829d9327b3bb8f9ea45aa89b. Chain 2 (Bitcoin): anchored in block 957211 (2026-07-08T18:28:35Z), 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/USV351336416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9c7f13acfe504742e45464edc692c758faf3bc12e3074fe77fb8acfbeca3eb. 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/USV351336418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9135613e59faf129d7bb673959af18072b1e1365ca113f126b47a8da0b1b7ba. 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/USV351336402.
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 0x41658cf19ac4870e7664362890a1c411c4ab3c0fd6f99fe51745b84ca1aae2a5. 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/USV351336406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0e7859a46dc43f1db0f446e9cf311c86e7546d09e2180b3ce3fd610e648bc7. 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/USV291464269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b51274eb0a09ede5ff94514d1af4631e7c0329083cd9ad1439028661a5aadd7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USV291464273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e66c05c39cd6e9611c2189ffa3a24c73009c57770986defba65f05fd556c922. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USV291464284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b01809f60ccb102f86488dc6cb88bc2dd84d6867e627380b9dacc076d0b931. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USV291464279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0ca9f874e3c486328ed83c9fa214776dc35b578f63f3e404e9f40966532d57. 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/USV291464280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b362f040b9c80d4607869683c591d063e7003ca5cf47fc06c44dc1c58840b0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USV291464281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd037bdea2fe85e23ac35edd918f2eafa2bff61bf5cc5863976b45ce0a6b045b1. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USV291464283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa58773a49706403189b62cd4fb59ee8b950a861bab4699c98e1fb1789c469d. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USV291464285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9725e7be5d0d92d600a8ff0e7a19326b76b717a752eff32486c60627001f1cd. 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/DEAQ71942407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d7c7381a34275581ee4e8cc1284279701184e1ee7448b7d5a339987155a2a8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA5KR1705686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02ddb6ccea6a2bacf9fd09be0d552615cb4c7b64b4ffd0dda78acfe9e4c0355. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEAQ71942401.