Matsu may refer to: Mazu, or Matsu, a sea goddess in Chinese folk religion Matsu-class destroyer, a series of Japanese warships Matsu Islands (Lienchiang County), Fujian, Republic of China (Taiwan)
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 0xadcb6f3abd3a0293fd495af19b51d95d5f5871d6e2e7258c7852a7aa5f5350d6. 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/bb4d839e-cefc-4d83-961e-763a756d90a0.json and https://artists.proofprofile.net/proofs/artist/bb4d839e-cefc-4d83-961e-763a756d90a0.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 0xde8caeb27851c10fbf1c04b95b6f72e35ba72503e79b2ff714ee2ae5eb2bddd3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPT2244171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c7571035812c7da05111d303a8fe0c70df3f863fadb68f7e5e650138446aeb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPT2296498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f95eebb9dda881899d5b3b3ed396e51c717fd010b1eeef34f69fc27bf6f1c. 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/TCJPU2216107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921482c4a17aab46ab4c5374aa14b8abefae6ec11f743f897a2612e0aadca4d5. 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/TCJPU2371084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383bb7c16a29c7332ccbe06af30e39b3d28922d4c3668161b481f5dd834e5483. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCJPW2378035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfeb8383506d0cda309f4b55a99dc60357412925e8050050b7f92f85afdf627f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPY732400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe453858ef4898d2b06723f53c36d2c5c19f130309bd691e72c9943c944df9a4f. 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/JPY732400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb06fc5108aa38995e2ce5fa5e1436dd3f555bc042ba1c01d273223ac24fd94. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TCJPB2474634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce3939df675273ffdad87120a99280c1249ceed535a0d23a432394227cd9303. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPB2474636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0c013af6a7bafd9f228ef0a7334d0bff03d65aad34cbc6b8de976162eab920. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPB2474655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4a765bf04e29f79f877db007e706e8a5f1a21e1a58b45b5cfc263e7f2f7600. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/JPV941703678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb212cd7ae67e38f19581e31507469b8ecd8706a58f830f8211a5700198e56a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/JPV942217114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5640675a9baaf11dfabfa09364add2254b253ff1f291feb00c6fcaa7206994ad. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPI2566662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf86122bae0d016c3f37394957a201e066b4754f83291a7c0ed55668bee1a528. 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/JPW792005713.
和風のリラックスBGM -箏や尺八、篠笛などの日本の伝統的な-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32529ee4e97d888cde73f891e1ae739dae5b3f9408d4f59f585d957d0f9f5461. 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/JPW792006238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf86122bae0d016c3f37394957a201e066b4754f83291a7c0ed55668bee1a528. 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/JPW792005713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706423673bc4e09523ecad4cd59aaafc3f7364ff48f13bede1c0b67f3dd11faf. 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/JPW792005714.
和風のリラックスBGM 4 -箏や尺八、篠笛などの日本の伝統的な-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96718d0c95426a4c7818e843234b0725c325003178cc61f0dfabc2ea5105e23. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/JPW792006193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dfc25aff193c90c7df6748bf6170a1b7d5b0f7091c6b2ab888977e7a7c709b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/JPW792005806.
仕事がはかどるPOPS -集中力が高まるインストゥルメンタルBGM-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb06308ed42c8a86d75e5f08dec31ff6472ab4ed63623240aa13bd6594fe422. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/JPW792000063.
仕事が捗るテレワーク用BGMヒッツ -奏-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8634777398077c91a1d35b8d0107987b66b4edb98075c52fe5f677b023cc21e0. 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/JPW792000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb06308ed42c8a86d75e5f08dec31ff6472ab4ed63623240aa13bd6594fe422. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPW792000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8555c235c5a869ff70e98083a9b18994e40b34d195f58899eee4a8fbb44bfb64. 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/JPW792006198.