Marcela Vale Pinheiro (born 29 July 1987), known professionally as Mahmundi, is a Brazilian singer and songwriter. Career Before starting her solo career, Mahmundi was the lead vocalist, guita
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 0x72bc8d7a69cc9e0147d070c28aa2ead42ac84f0b6349004fbd9b815af8b467f6. 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/6d0538c6-c5a6-4510-a831-368d63416a8b.json and https://artists.proofprofile.net/proofs/artist/6d0538c6-c5a6-4510-a831-368d63416a8b.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 0x155edd96c0903dbc52d1491609172ba4d0511707757b73140eac32a6b5f6835e. 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/BRUM71902836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaf220067510766d33a8c42cdfa06b3d98b071cf27b803014eab7099380ee36. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUM71802650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d13c6185dc265866c7046df310254391ca69a7d9e96bf1e815b1e67b76275ad. 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/BRUM71802655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ff85d3b1cf6e027e021a6250ef1be5d929f2a256efd39053d66a2e7b77b490. 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/BRUM71802657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1a95d477e75b260375297f23d83945264fad2bfa047d6007c0f636490d4ed9. 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/BRUM71802656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1ce3838a9288ae0f7929dd086d3cdc9d85dea0686648a59858ff50471f88e1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUM71802652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab84c46757d407b7af91f34b17cf4394c53855a3931b2ca415bc720a6d29595. 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/BXBFB1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a0cc5dda7c721a12f0d6f8f1f064914ea0b5319b991a9ae025604de75ef9df. 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/BXBFB1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843c78418f948d147990c3a04f1b0c39d811ec083b342fc6d074b7980ee6ca02. 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/BXBFB1500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe576f456d3863efa96d24da6bf15658b443101d7c3a207bbac62f346c5356efe. 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/BXBFB1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fc6a6f1e62d79eb794435098145225c4235b17bd5a2e99b47c7c7bff735511. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXBFB1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f6324430fdeb9cdeb101ac80ce525c2d1eea55b070118af1ab6bd4b32748de. 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/BXBFB1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6a885d2dc5aac8c6cc3e4293a681f4827c936afe9f5644ada3f31e217819b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXBFB1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59a8efa9ea72e1b1e3b74063a6aade9d75968159d93e4e96a965d8ac2d578d9. 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/BXBFB1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556f1cbafbdaf749a354f1eb998c1c9f8ce1d0c6e7821eba8b9fc571e9df9bbe. 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/BRUM72300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41351e6b0475e38a6f3dfadbde6dd2ee7b5093cccdae44ad4bd56ba329af77d. 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/BRUM72102228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f06eec1883b21aec7951098f3f01d5be5b2f50e04f3356d3062d38ea687dc4. 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/BRUHT2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c59b003874ad86e499449c7fbb0955b46f309abde748b81c940a063e9505dbb. 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/BRUM72003315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b7b6573de8d2f2cd0999f29ea3fbf3809eecfbe642fd1086c184569e95427d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUM72000812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155edd96c0903dbc52d1491609172ba4d0511707757b73140eac32a6b5f6835e. 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/BRUM71902836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038c759b52ae469f1f073c997f42cb7c8f51db717660b5e60c24563b3c5eba54. 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/BXXIP1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64df8040b2842ea54972453cb84e8d440b4bcadd579d868c751c8aaf807c5ce. 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/BRUM71800427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6be91b62e4b9df9ff012f9c038ba7e0a38e4b2cc4ec8db94b7bad069f8767a. 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/BRUM71707019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068867b70a0b0d0e030eac933031b5de1f2e903bfa1c284107e325b3d13dd7f4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRY4O1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259df5846a9c5df25a46d9a7347ac4272c6867d7850e91487909582822198665. 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/BXR761900006.