Bachi (, ; also batchi) are straight wooden sticks used on Japanese taiko drums, and also the plectrum (written ) for stringed instruments of Japanese origin such as the shamisen and biwa. For percu
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 0x7b6a066e190b7906acf85a565048b067597c6d214d2fe5345d803d1b1c10ee7b. 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/f3d00377-7705-4dd4-b2b7-c8c175b43888.json and https://artists.proofprofile.net/proofs/artist/f3d00377-7705-4dd4-b2b7-c8c175b43888.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 0x3a2fc341ab1bde4782c797639ee476e9ea796bc7a10b465ce8a1d981844cf2fd. 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/DEZC62357279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd4a55ab69af7d41fcecc76975b3c4dbf4dc61d3bc5728b488bd8e862848084. 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/DEZC62357280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9b6dd4e44318f0f8c2c4df5842b4797919a7e49115e9f95e95e54ed91461b3. 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/DEZC62357281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c460673f01dfb2bb0b8587818ea841f13124e459eaaefdc1e57567946f1a9a. 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/DEZC62357282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388c1c611da2164aebddde7568df24a315d1cef0b82bd7fade07febbe5dd3991. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DEZC62438659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e5433328f971db9781f0a36def05c3ae6fb5b8572765607cc6cebfff5fc1dc. 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/DEZC62438662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7b7fc408ab006463f27ab2f05c69f371bbfa30a37b4d13e4d1b4b79c751587. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/DEZC62469511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8d1ba407166972a004b9873a2198cca213a81871b0805edc31ae84c528ac7f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DEZC62590823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555ea3329dca36ee129d14c2831367dbba35299c8bcf492297dbd3a2e214fdc7. 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/DEZC62590824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff233a95bca0b4accba0e441ef91286fcf7ef411cd7e27f9234616072a2e57e0. 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/DEZC62590825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bfbfdbc3f833de122b7fad16c519043d33ad35ce07b5bb7846fbff1ef5d91c. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEZC62590827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032b90858ca97e3f47462fbb90164c237a864bc8f0f6f91a595c897240f943b1. 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/DEZC62596494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c71342998d9f47455bd1dd8a44a44ddff1fae0e8bd97a1881fafbae4852faae. 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/DEZC62596495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92466019df13f8959ea5fcf5b814b56d8e7a129b24f392c5892baa559d796c4f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/DEZC62596496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44814f1a7a9abfadfe60d97c857dba79005cd2be233f161555bab14127986553. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DEZC62596498.