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 0x34febee7d716c6e8c99b3a038f092e3bd2ba26e1376974ddf4b80a8978ca044d. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f4e9b31-bb42-42d4-b34a-2a8dda87f80e.json and https://artists.proofprofile.net/proofs/artist/1f4e9b31-bb42-42d4-b34a-2a8dda87f80e.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 0x3375ad8ef512a01e2b0fde47b2d1bd8babd70eb998f4db826461313e87497210. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:15:00Z), 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/QZQAY2554051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817af5cc1d522c8cb036a4c1ea0d6a4d4b4b5c24b2cada1d30d274085410ee8e. 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/QZTLA2513394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15c9b01596338da2816afbb2deadb5fa73e42c4658ae8d20968d6179c62a99b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTLA2530976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6f05a248bdcf3d2fb2c2e36495fcb6c164bb8bca66073e136638be393b37e9. 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/QZTLA2530456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e878ef99193afe265b763a632a0e80838aaa777f3a9e68c3eda53a49b7388ba. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:55:57Z), 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/QZTLA2539742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6a09a8da76a2ff814962cb414939150b1196b4637f260ef6ea9b9b2e11a9e8. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZTLA2526454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83e5b28276acb0e628ebbc812c5a3f60c5b4ad8d894ac894879bcf03a8471e0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZSYP2510907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8290ff8d8f0109c7df00f948c59fd956616ae2db16d21edbbe75adbb4465ed. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTLA2577183.