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 0x19322432498376ec1b6363a90e37ab35bd6b969ce261414290058cfeb03a302e. 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/76f412b7-f010-4593-b714-323a6f7064d8.json and https://artists.proofprofile.net/proofs/artist/76f412b7-f010-4593-b714-323a6f7064d8.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 0x0bf002c4a254bba343b71f2f5a7d78aa735691131a2b3a0ebb5a9bcdd66f45c7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:28:49Z), 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/PLC062430521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85010baac54e91a20a2f13a3a73f74b0142995a5b5583193935cad6600698a23. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLC062430527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7859c144e64808daee7990b28983b7a4961a756a9b612f6db9d9eddeae7cbc2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLC062430528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7827a0bd68d885607c387ae9951f6d19c56ffd39ba20cc2f4f1540724b1b623a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:20:59Z), 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/PLC062430532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36d9eccb70f6dffdf1db4a0df67aea18856084e9f29f44a6c95e351f02afcf6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:23:45Z), 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/PLC062436513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf666b3139e8084476e1e5bca86b21c67fecb1c987b151683ebd36bf3a8b0afb2. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:43:57Z), 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/PL4K02505944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9eb7d3b51e422d61f33e5fe4412259d86357743df64cfa1092000c2e84ee11. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PL4K02505611.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55063c5643c910228e5314bb81cde30a2d9482ccce495cb03bf47d0ea7f9d77e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PL4K02510618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7de97832d6fb7f17155eb0ea2a6e03c21ac3eb3560fb4579778aae821225f4e. 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/PL4K02510137.