In the British Raj, batta or bhatta or bat-ta was a banking term and a military term, meaning (i) an agio or disagio, (ii) a special allowance made to officers, soldiers, or other public servants in t
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 0xc685fb8c37a190de29ce804b0b8d4310a78afa4f732b631d2275fcb4a1224ea6. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b07d0a22-8ef5-4245-8ff0-3a3ec9a25908.json and https://artists.proofprofile.net/proofs/artist/b07d0a22-8ef5-4245-8ff0-3a3ec9a25908.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 0x9f2af28bfc475ade8ec8fd5bf6d76f7c1fa9faabe6d7ff974b3b0ddc08859b21. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPJ32440831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd447e931cc767a594ac271f04e7f54c40f613831ffacb1d954d9dc851dc5e35f. 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/QZPJ32440832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8764d64ecac4f9da9e0d7a0e6d62489a3d562698ddf469cf8a171a6e22d3579b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZPJ32305317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba1e89f1dd3f82289d221bb0445b4c8bf0092e68b1658beb68f7f6997cabbb1. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZPJ32270767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29af2a459c9f65bd5bdd749a95004a0e61267ca4f7ac2a3297b4d842b943781a. 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/QZPJ32440833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f6a2815c0b6d502f911c428b32c91f25c4f994eddd67fad70da2dda6f6b526. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZPJ32362258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fae3742c4f2807e2f070c29c6aa7c147f0370c0288a3fa42c9ab7f69288e685. 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/QZPJ32440834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc398dfa328453c5c9d676f8140332f43a538003d00246fdd0bace29c99ca116. 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/QZPJ32317492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d531b4f3c86ff29785978476a5f2ca9bd0c142082aa3b4f3616f9d2ef190f4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZPJ32380378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6720894d03f7131664f21f699b7b8f81358a6c383066bb5e9a56d501ded7e5c. 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/QZPJ32333548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2978d2a030e0c66531f88c23a702fc5c1ff572497fe8e40e2695bebcde470d7. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZPJ32440835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c63c50575cde91b10bac4d19d09803fc795af7e6b5f65d2d2b27c05f3a7397b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZPJ32453050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c06276adac70f0b9e3fb84317ef46043c1bac6d00c3c237ce8e8890b5058cdd. 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/QZNWV2560546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862abaac45b980a2a304c12f192782c4395c81c5c6f3298781c00f4f0db14ed4. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZNWV2560547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45500b47790ca0321b990581ebec1af54e3dd5dc54f2b62654afe072b0d43d6f. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZZ762532183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5c69742771c25e6afac159e1a685843905055439ca006e8dace811eea1c12e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7S2562203.