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 0x7bd7a0b022e075c7ea2e1aa4cb2a5928c07a345cbd12637a1950d20ec4a6d6c6. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/600cce28-2b67-43ac-b221-c7f48e5c5c99.json and https://artists.proofprofile.net/proofs/artist/600cce28-2b67-43ac-b221-c7f48e5c5c99.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x17cd10865cdb255521f2ced2e8b323f95cb5f0e14970765b142c20fef02f5d76. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:09:35Z), 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/QZFML2133461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc339ff113a424ab02eb73818f61604335c018a2be199716028b625b27b3ac431. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:25:12Z), 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/QZFML2133462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8f1db8457fed03f7c58fe99b989bb938f98baa1e94464296ba1334f1935b0. 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/QZFML2113506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42db20266361f38bbf89fdbd977cf5c4403adc3da9be1a87341b3821d008709. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZFML2113508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf667e13494c1ef924182f24304ff872d22fa526e5b431996d9caee723e1df3e2. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFML2113510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617c830e2eed28083f892d9a24d60ece68a0b8139a7cd71c0721ce62f1138565. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZFML2113515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94da03a16bedd15390b183becfe8301ca55400199d44f5faeec93a3d4493e90. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFML2113518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4349ab024041c159ea99fbe09d1aaa14dbc571911679180e98b7ebd11d806512. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:59Z), 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/QZFML2113542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1754b4b4aa6e23944d922968666727c216f1e60cfa5b5e00d732e9d1fdee859b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFML2113543.