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 0x67c4bafd169f653f49574261600f46bef7696b66f9bc4c44956de82b3ed81ce7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab9480df-530e-4f21-a5b1-0d33f5491444.json and https://artists.proofprofile.net/proofs/artist/ab9480df-530e-4f21-a5b1-0d33f5491444.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 0xcf99bf702fa22ed67a749eaad8e8d49262db89b1d93b2ce92513d5134c58f068. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:24Z), 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/INSD11905327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc030ca263667a1508319cff1a29d5d2b9a7cc7e178520fe38ba792be1185935c. 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/INSD11905329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc030ca263667a1508319cff1a29d5d2b9a7cc7e178520fe38ba792be1185935c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/INSD11905329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00503519e3a43f4255d08bf648ce0b05ce5df3ff6ce1cbbc5d976aa6fcfd9b1d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/INSD11914646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57d73cde27cf651b92cec21f86e023f3ce2b953a3cf69a37d989b900b7985c3. 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/INS922300798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b3e3e8c8737032fe4c900dbfe857ea50431dd1d6d3d78bd5d88e758aa866e8. 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/FRX282451712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca0443630f0b8960e26731fd415d93312c11b0956bd54862f22647d44764305. 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/INGC12300711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d89ae8890ed1f2a054ff40d2c2e5efaed6f5c554d130b10fd133b106c13eb50. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/INS922500207.