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 0x87a61aa619b43aef17c7ffea5154ec65ec228bad11b887062332b4d8259a6421. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d722ae75-56b4-428f-945d-90b88a9d3e2e.json and https://artists.proofprofile.net/proofs/artist/d722ae75-56b4-428f-945d-90b88a9d3e2e.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 0x124d27cb45fd9821ec645a3b05ac24ba81d0c9b14cafad1f01ec4f9ac4151f73. 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/TWU712400832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee01a36e53d8cfbf9dbbe7ce25fde7967df39d8ba45c92b37b944b056e0275d. 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/TWU712400835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e52705df1b88dc99c0551900c4644b413b6323c49b83a5b4f6aff604ab3fb5. 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/TWU712400834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc14c70a4044ff58c29480300c14076bd2e91ffc832c7227007c91a7ffb2d914. 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/TWU712400836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe948e05baee488ae9f4c1404610198d3253216c5b176319cc7f213d0f601a873. 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/TWU712400830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67e5f767f96b0345de6544830edfb09e711c9267019ecc830326b5e15759785. 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/TWU712400831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e37cd6f719b52ef37847622aca8721ff37f5f983dc577e5ef7254ae093abdf. 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/TWU712400833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7bfc2aac328acb08a73caa03c5f088e6ee7b65541815562f4f07e0167c7625. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWU712400829.
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 0xc9aaa2dc6d208758ea8db549340ae140c4a5b25a9253fa49158d9499f55d2222. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TWU712400837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f93740c39cec4e189fb1b73af62249bfcb2fb624afa9729058277803d2e56. 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/TWAE32001962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29720cf85975eeedb13e6e73777ef522843a32fcd9f3f702b37073c282aa92e2. 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/TWAE32001963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02554fad85ae940590a78d9403f26d916a653e8733db23846851b052a4cec5d. 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/TWAE32001964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f43c19b8c308ca45cdbcb792f34e947157aaf5a68a2fa6498498d5f6a008d7b. 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/TWAE32001965.
Brainwashed Ignorant People feat. Kin (泥洹之迫)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50a9a5cd05dd2c8b7d283575c4dc23f411a0fb7c86e09f20d7fb09511bb9dd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:29Z), 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/TWAE32001966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d0509feb7df90f79913d310929b08768c1d62c27c3d16730a43fdcb0cb52f5. 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/TWCT52539229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a61ee8ab2ccee71e3c84e58a6b22dae1e7234ba257b3fcebe901cc93d73dad. 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/TWCT52539230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5984559a86657cb8b86ac10b27d9267bebfb0f06afbe1890ec3e3e3e313add9f. 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/TWCT52539233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd7a2491f15c8f9a8742e9a3899c837646d990be8b38e1f0c236e563e564e02. 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/TWCT52539235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bad6ad7d366041bcb3ca122d9aef3cdb4c57096299693c2b401903104018d7. 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/TWCT52539236.