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 0x77af2b3f685612f3eb4748d6fc059cfa3749df641b5e1249041cce7c072af0e0. 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/29825951-d801-42cc-88f7-6692e81f372a.json and https://artists.proofprofile.net/proofs/artist/29825951-d801-42cc-88f7-6692e81f372a.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 0x9aa1d2bdebc0f90a48e870b31e2545cfcb962c7d53116d2a29c71dc60fb67982. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USA2P1389674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59e1f6afa5d7a5a571a4047da4354473ccad6ad194295520af252006b9015a4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:06Z), 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/CHA011400372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3234bf25b5610d66e7635dce623faab4d648bdc484946557168170b891ca7fda. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CHA011500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9bc0db08ebcb4bb86bf470198db2fa27c2a780c0aff84ee47644241422936a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CHA012300959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559620867cf16184b8da79b5f661bd8d4797dca41a497226d44a6b10128ab800. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CHA012500828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a039cec01b42c1439d49bd6c6b1ae8bb4e65373d0fdd937f85b26d777cf190. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:53:25Z), 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/CHA012500829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fff9e86fb6fdb9aba182eac13a07997cc942c7d1dd28f8636b4e6b0d1ea798. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CHA012500830.