Matthew Albert Costa (born June 16, 1982) is an American singer-songwriter from Huntington Beach, California, United States. He has 13 independent releases: 7 self-recorded EPs, 6 complete LPs, 4 of w
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 0x8726ce41f881a7ead70521a795dfb2826c7c67669907fce714d454dd5b4d4c39. 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/c263d7b7-3914-4510-b6f8-f22bcdfe3975.json and https://artists.proofprofile.net/proofs/artist/c263d7b7-3914-4510-b6f8-f22bcdfe3975.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 0x101c9035aaec1708eef10caaf8adad3f16498aa2840b446167c3f0e44073a233. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USUM70600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b31a941b4ea7c4f303d9feaff12f2ff07f60f9cb2a1b9cd9b7e35fc95d8f3b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USUM70600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb590147a7436db4860ee37a1c5ee5496a995d83ab91ada9fe46ccf1e40be89f. 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/USUM70600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a693b916c5c4c9a0322a748ff692e1015639c2001ca84843ea6d86872d26ce. 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/USUM70600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d89dfa57c54ec6bb0538eaf235c5d449ace8b9321d838d03314093957120c1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USUM70600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e6cadba75f4b92a5e3be0cccffd1ade067a2e19086008423211a5f3d4bce54. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USUM70600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc11a358ec76b78e4209f9fb0ae5e6635f49f88cbb1fe211c7f4fa9d6b42817d. 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/USUM70600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9870949121c34659a93d6db765076d7da0b90db719f5ced40381ee5f9a94874. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USUM70600059.
Cold December (Int'l MaxiSingle Enhanced)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc73ec31b3cbbfdcf761cd0cd3122db2fec46eb19cc996b8138e6bfa0f788c9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USUM70746916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb652a3f5dfef232b08568c17970959e173ae25ee1b49b4490923e92df9e3ef13. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USUM70746917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338cde9f9042b751ae4d016d82f48ea934400401db54173c7df2549a73c31d33. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USUM70746927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e7484b244ff0538c2baf20c285b904f1dd274f9d518c812acc7c2ff706ae75. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/USUM70746928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50ec3090c5989312b783134c5eb5150ca0c6cf2fee33f94f8d6c845636618f0. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USUM70746929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47715eabb70a65912b832a9d73ed008661c5f30462c0a232067dd0c6be49606a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USUM70746930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918d127e8e35a15314ed934544f2c31e91c00c0638e6922a09f363a6541e2e9c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USUM70746935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5db64b3afe8327f02f753519aaaade2de8781121675805f537c42b3b37bfb30. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/USUM71214021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a59a40e799109db145b0df8f416c2b6b3fa3458fa045430650a461367cc1fb. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USUM71216649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb455f929357afb354b50c1a18e8e2b8d2ce3b6c45bd9b6241969f476c7ce7ad8. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCACD1572337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0ad265747c3b83e3b3fb59f465f92effbf925e8a00f12dbc925e0f0672adf8. 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/TCACD1572343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a51c526aa40c28759e07fff4447d4c2dbe9c3b6b3f08ebab6c277d8cb44c8d2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCACD1572344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a467901c41abf4c2fd4993b126862e1a635a66e29117e04bc6a931d494556a4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCACJ1517949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e6154f8579442e1f801468747133216f650243535fd486ce985d9645a73f31. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCACJ1517954.
Many Memories Ago (feat. Ellie Mae & Casey Costa)
Orange Sunshine (Music From The Motion Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d7975a3a94bc72dcc5529b984415c5b8bb1b91258555d7b59b40774bd2a69c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3R21919601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd29978c9be411fc7aaee77f3334020e7bc5104e22e98de016a9b38ef74b8e3. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/US3R21921201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d7975a3a94bc72dcc5529b984415c5b8bb1b91258555d7b59b40774bd2a69c. 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/US3R21919601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6c0aea9649d3468ee898aef5af32d8e0d7d862423572f019e03293964870aa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3R21921204.
Donde Los Terremotos: Songs from and Inspired by the Film
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e64376922ec4e3c1f34212c222f5e616b57a9269f224932f69055e12b5c797. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US3R22224801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c9ead32af3688cc7e8577899b3adfeafbbdeb9a9c2f28d25df115fd7bd4f77. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM4TW2491654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a403242d4e222feff8ada80c081969bae402f57877c6663352953749107d44b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM7282453081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931a8dcb8bef9be06a75b32264839d78fd880beec4f51826f33b298f4c9768f6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TW2582802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4bad2dee9f69a078389d2474245dcfe8df1ffc112b188e7161e6e06f2071e2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM4TW2582803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278fc5a46d204610450ddd73e63b8e65a25dbb333b76761d524a79ce0ad40a06. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUM70612641.
Jack Johnson And Friends: Sing-A-Longs And Lullabies For The Film Curious George
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad01dbb2a0b1dc9ad2830f8e0a20d01ce7b2843e0644b72451fdc1ac9f6e5e00. 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/USUM70507135.
Sing-A-Longs & Lullabies For The Film Curious George
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad01dbb2a0b1dc9ad2830f8e0a20d01ce7b2843e0644b72451fdc1ac9f6e5e00. 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/USUM70507135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ba7c500d6cf4c1c0aec251542d050e419e94b45079225f996df4883bfcb942. 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/USUM70600942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfbc964adc2a0032b6fa128a945ed2f21133866298fb11c5f543db43ac7ad27. 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/USUM70603214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278fc5a46d204610450ddd73e63b8e65a25dbb333b76761d524a79ce0ad40a06. 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/USUM70612641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71743744fb013daae980e93e23f2e70b04a7bc949bbdebba348c9f449ad03eb6. 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/USUM70612651.
This Warm December, A Brushfire Holiday Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ef47e2c34fda476a46a1a8ddc1230958c2a24f6b2302695b40da1ea38c7df8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USUM71115667.
This Warm December: Brushfire Holiday's Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef00fbba409773b8da887218b570e17e105a7ebe6988033491ba4de375539d41. 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/USUM70840421.