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 0xb274d32cf508eedd3f1be502de86ed3d4d6243bb61c6d1c8a380f2224401c000. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efb1231c-f240-48bb-ac3c-527c9edde367.json and https://artists.proofprofile.net/proofs/artist/efb1231c-f240-48bb-ac3c-527c9edde367.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 0xf94122d87f8ce7ccc2dbcd516007c7dadcd86b0564a435fd87f0ef6bbf451e21. 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/QZFYX1979083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fc7aeafc882ef4ff32d7ccb91182c7cbe9bce7aa272b48e9d8528a8d19eaac. 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/QZFYX1979087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c549aa61de81c8e5f3a4f2218ee2986472c0dbe793e7f32e961b8ede816a8f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:26Z), 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/QZFYX1979080.
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 0xcbcf95487f7da18646d5f9e12882aa5c9999f708a78a264939f937c26c1fdabf. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZFYX1979081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf877f4dcb1e99fc2a3840ee5a03c36e2eed2e8d44347b3c5d6c37e79d05ec3. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZFYX1979082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a88e4c6423921e9d1c73b6cd7b82c576c9416cf534abf5cbf6495b1c2fbfe4. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZFYX1979084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaac031ec3287f370eb6829ab6a6fa283de40eed30bb7244458e2489c36dfdd. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZFYX1979085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176e8e4692ed775c95fce763e19302634a1c40adcd97d6f4d26771902a1553bc. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZFYX1979086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98179183ec71c1e1f8b3ec48cd076680c29368ea9fc647f18017497ad35bd99. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZFYX1979088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88400b2ff9dc183838a85076d105a840bbc9a510f6324009e5f4361708e427aa. 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/USCGJ1510644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e44022499a7089a1837a4268d39fb9ef6c60c2d7616f2075c77356aee11ed16. 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/USCGJ1510645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329b594914efa1be1ca59fefd1c9a786e931b77c45c610100b17a8a77c24171c. 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/USCGJ1510646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa30e714060ca79f390dddc189291a51fd857206350152e16945477903b3e79. 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/USCGJ1510649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dccd1ff1587232c5be49996c9f9e66cfeeb2549262c9010f5d95bbdef82c6d. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USCGJ1510641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272070a8c93b65e25ec0c691240cf81fa95155ad96b5016294fe8476cac75db5. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USCGJ1510642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cc190feb4e6a5d1588c208723a32cf1e162e3f9579745d79eb177938cd1c56. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGJ1510643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c80557b7ff85b8baa710dabf295b80d7534d205873d192e224db25424117c9e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGJ1510647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a68df1711795ef4b1dbfe9f4f6eecd7d015bf44763a976938dbb5385a20b92. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZANL1765284.