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 0x53ff444d3bcce9e5035a61eda37bec54e8b704624032e472d8b76f8fa89840e0. 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/8ac23c0c-79ce-46f2-a9ea-af6eb9aa1416.json and https://artists.proofprofile.net/proofs/artist/8ac23c0c-79ce-46f2-a9ea-af6eb9aa1416.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 0x20dbbeb451847e0ad432829d4e44fad279c3831e7ba93b0d9dd713c8bd1e336b. 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/JPT571860011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc948f8469df46c140a4f620946443f577682d541b9ee522c2066ffd94487999b. 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/JPT571900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e94045f6a43731fc548d85735df9c2e27ae59bf89d316d972440f2701d24b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPK2069530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb1ad90abb1cb0ff79af9480fe0ac797fd8100f7b788fe7e0e03e96ddbd4436. 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/TCJPK2069537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd830c366149d80caeaedc2f87366d8699a62659b8d8ceab0c6a6c64456a4c9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCJPK2069540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5e379c0e4953b6c913cea603b55a21fc222d88cc82d1c4cda64de236ad0eb4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPK2069545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71077cdd6eb703010af9aaef2c4618b57daff9e08bc5f4a1b29740f5b342fe1d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPK2069548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d438c7c4ba42dbb3f9c070c6c97d5b8836ae46d3137f6486e8bf6c48a819b6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPK2069559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65e4e33c488690894ebed5722fd2bd20420a86a59b124e7d3ca241d4c39a578. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPK2069573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2036fec9e372721f3abec3af1672845bf2908f22c41f1b5be806a0d3ec1e615. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCJPK2069577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3630d042a46ba7d1ffc428bd969ad5ae24c7da7bb68947b8fc46cc5ad3313e1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPK2069583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e723a0682c972009274ff7c497d8d4fdef84bfe57a795ade59915320a12873. 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/TCJPK2069589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714197be8c24c35b01441289b3a20b1be2d37da3753f46d3e7fbc50428fb5e64. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCJPK2069566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef44397c7e5ef9ddb79cc7e259975dac927bdf2f440625092942306b7f628e0f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCJPL2084252.
天気雨 feat. Hina (from FAKY) -☆Taku's Japaneggae Remix-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe157ece67642ad9d5c16fcfd5c7db1a68f5cf39284ab0f346834c1e15b25428b. 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/JPB602100639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616b2d129f292bf80758c770ecd883b0e70f88634c50f88782086d7eb906e1e2. 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/JPB602102193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82e2d434680bdf193ede7ec2ff347fc6353e736994c2119480660ae86342700. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPB602103393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616b2d129f292bf80758c770ecd883b0e70f88634c50f88782086d7eb906e1e2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPB602102193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2d7ddb3db7e8631d7c559ad878b422e308a7172261b5a6b06cdd0724662891. 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/JPB602104128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f0ec68d546030de1cf4688e2f47c517e8ba309c1e7cb1595d32185db13a399. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPB602102902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d45cd6491f22b877976d30e059529d0600a155ac41c3725f3012b4f92e64796. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/JPB602202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabafd424d1b9805e7cc2e30255617c1c2c814c910d52fe0492b68197bf72e9db. 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/JPB602202311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be3258e7ea7f7a36827a8dcce1a13d97ea734a01779b043f3d7654a18fb49df. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPB602202904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c91485bb6392cff1f492e17fd62f1735a245fe01a5159f41cd1ed30a8c0c6d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPB602202906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0efb855e188e51f8b2ac306095a9a8f034223f627d394c97a36febec89f1fa2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/JPB602204740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd823fb91d6c7e7eb8e1ab8980d576daf993d9b7377433ed2447930804f4b05. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPB602204741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d12a406ea44fe337275daef8612a7c9e90d91ee2171fb6fa920b01b35a8d3a1. 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/JPB602204743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49772f53b5e031701e12d332bc4853f1755cbecaad16db5bf30181df246645. 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/JPB602402600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2445f9711e73805038774cd568302db8dc2ae750a458ac4048a73a432233b0b7. 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/JPH492101042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e8970ee0960f24e5f141a0e5323ac553dea44bad8a27c34475212cfdd537f9. 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/QM4TX2496262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06de5b58aa4287e22b9ea5f0ce537ce8ca7255e344ef3946ed5d73d19a8aab86. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TCJPV2315973.