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 0x23a0a5b1d78d1a8efda948d3d94d843d2aedd4011137ec4e914796d7eaa845e9. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/549c97db-88ac-43be-8034-e35835e9b42b.json and https://artists.proofprofile.net/proofs/artist/549c97db-88ac-43be-8034-e35835e9b42b.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 0x44ab215271f6190f8e34026c6dd1da764ca05add8c53570daefcfd215206cb9e. 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/CH6451500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42867bff7544acf05d1ca7e3ed17645df3656bfd403d2cfc3ba365a002b5b7d. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CH6451500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf6e6dad56343985f56d4d2a9be9a525f1859de56ca3cd2d93e3c24fd8a411c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:11Z), 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/CH6451500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a57edfb5b44c34a11a376414de16b2229abe0a20492cc6c651403f474262960. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CH6451500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab01c4903cb9d812ca098f650981ec5050e35f7401b0a3ada193fd350710735. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:18:05Z), 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/CH6451500455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd4a90dba5989d5c39a902b5870bcca2ab5d341c07f314758d66941754162f8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:01Z), 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/CH6541702400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b329c71537689615b64e433337ea180f1d4a6c327b43d69b606ec438d31e90. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QM6MZ2521340.