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 0x14f1735d48f180f8ae58987e9ddffdf8e5af0261e150d91f1c96c90ef6d5706d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/780d6d26-6ac5-4396-a445-2b76bd4d6f0f.json and https://artists.proofprofile.net/proofs/artist/780d6d26-6ac5-4396-a445-2b76bd4d6f0f.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 0xb12c14e967006ffd73531af3e547c0f8a22a51c3238ea7df4e6377420d8d762f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNC2008979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e788c854f7a2b2275d1fccf9c519098dce0e5a8c745bcd01ccdba448136020. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZAKB2136322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e788c854f7a2b2275d1fccf9c519098dce0e5a8c745bcd01ccdba448136020. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZAKB2136322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043dc360e32be4c72a0aad3c5e990500f53d27ced4befce391a9f8716f5e4b61. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZVFR2200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12c14e967006ffd73531af3e547c0f8a22a51c3238ea7df4e6377420d8d762f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHNC2008979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f41d61fc569f4593f918197964e3dbc26acb8d9d31546a0feb7f43be655fed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZVFR2300571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12c14e967006ffd73531af3e547c0f8a22a51c3238ea7df4e6377420d8d762f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNC2008979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692a5928574bfe42c1b2885cb9a3e5e5545a7776c6c50809e29e74b919b3014a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:48Z), 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/QZVFR2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d30597aa3d442b2bb62ea507d60f1d80c355e8726d499a820a1bf064c7afb7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZVFR2300573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be60dbf39d417056cb8f8409852afd1a111fd4d5ffcdd4fb61a48786b104e41. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVFR2300574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043dc360e32be4c72a0aad3c5e990500f53d27ced4befce391a9f8716f5e4b61. 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/QZVFR2200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a64308725d8a2e83319f523e1b0ae4bc479006cd18d5c113eda9df96345bb92. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZVFR2300572.