Matthew Santos is a two-time Grammy Nominated pop and folk singer-songwriter, musician and composer, also known as MA/SA. . Accessed January 2, 2008. He became well known for his collaboration with Ch
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 0xa5adea281ee10805cadac3005501ba16bcfcfb512445acc0c0be9db5def0b99c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5035b822-55b0-43ff-8d81-a6f9a4653e4a.json and https://artists.proofprofile.net/proofs/artist/5035b822-55b0-43ff-8d81-a6f9a4653e4a.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 0xef09c236d5c49ccc135a6359f644b0f3fa4e8d9d1e30a1a28923b95274b0f190. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/TCAAR1041309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a047bc022df76b4996b23974f0c23f4c7b40a662e0d9756b03e01360923edf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM4TW1598761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea229724358fd6f0abf7ee80881b41dc4e0ab4790f34f6cb2c9193107e410544. 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/USAT20704985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad46e3c7b5cd4c78136e618d9b062c6b6e8fccb917bd8e6d0e2a9acce52f0703. 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/USAT20706455.
American Terrorist (feat. Matthew Santos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639f4a5372a66e93a7611cd345c644bbe0b07b2a4903bee4dabe6e3b98768786. 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/USAT20620108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4f1af9f2dda4f18f831441689146ba89b46cf2baeba32b4930155db7706417. 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/USAT20902243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507061a702bde4a94afc40eb86cd477c0d7f9d86c229a0ef9bf7ef8cfe87c5af. 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/USAT20704983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea229724358fd6f0abf7ee80881b41dc4e0ab4790f34f6cb2c9193107e410544. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USAT20704985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea229724358fd6f0abf7ee80881b41dc4e0ab4790f34f6cb2c9193107e410544. 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/USAT20704985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a246c5f6864d548f6ca279dbd0b3dca1af24af37ecfeec01dd18f2b14720342. 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/USHM81941695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0594432858a63330ab81ffba528fdee770b250153c46bc93b0a98e39bba9e8. 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/USHM81941696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ff21ef7393a4a329926f5bebbf0f22146663309397886ce50cfe822441c54a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM81941697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634446fd22ccf315a31d43669acf85b863d8cbfa01fd285994ebe88d766a6622. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81941701.