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 0x3735dd23ab583a8022d61e812fb8339592ae19bcbc623b45877376b28150c71a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76d7e66e-be65-4927-b092-a3ecd5611110.json and https://artists.proofprofile.net/proofs/artist/76d7e66e-be65-4927-b092-a3ecd5611110.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 0xbfa2e3ebccf49cb469265819af77e36fadadffb832ef921ae68c50840149fe4f. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/USHM91022934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b89bda4e786f5c9803a93e70a5d7f66a6bc120c3a089393d99e980417635723. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:21:45Z), 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/USHM91022940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db2b4942c821f014d55b87dba5078287546a4fcfb9e995c1ae279445a5e0e82. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:54Z), 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/GX3Q92413702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dd25b6af908c6f751ac3aab50594a4cd8e86f4fd03984716b61dfb34e4923f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX3Q92413703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963571872b001080ee850df6b900bda366474d71621f0e29f2efb22e5bce7412. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:51:55Z), 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/GX3Q92413705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81804f003d9a3f1d738661ae0a0fc129fd5676d4d9cfd614050055b2bfc7f62b. 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/GX3Q92413712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba783d6e0fce13b77ccf7516694761f88cae910aa25fea0385efc8dbb50e7215. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:36:07Z), 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/GX3Q92413713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e08d8d5aa039bb872e79291678f5b5e967450e3e14c2b97bbf6edb3dfc577e4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX3Q92413716.