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 0x24e9a49c9ec680d9d9c7d14bb84703ca04046e4cc0b8a6b4836dc2b20b98a44c. 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/4051ab43-5f2a-4d74-b15a-23b1440a8422.json and https://artists.proofprofile.net/proofs/artist/4051ab43-5f2a-4d74-b15a-23b1440a8422.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 0x9c37af2927f1fa14f771c5d71e7858dc3ecb0baeed3833bc9d2ab971d1e3bcff. 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/QZFZ72129883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cded9ae1614e3b17ea304371d75819f0b4d64a6b629853e4e552cddbe13bef. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEN2121195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41538f0f116d3954c789af8b78f930280c6f5b0bf5e18ffb48eeab7d2754a916. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:45:33Z), 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/QZNWX2157172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf761cf5782001db6102b9ba9f54a5f901adaf256f798ea8a6fd162ffde0e3b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB72285731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8e7e0142c4388ccada593c8fb5c17d798e525f17ba598a0f203b2a16e16f4e. 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/QZHNB2319778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda528b6c6b314383fc5d6465e75188b19fe17f5a3ad117d427f423b858ba6240. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN62588118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0010402d331b448a7ff04ea76f1283ede969411c5cd03fa72beafe8670c6885b. 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/QZHNB2556823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf316f17fc2819eb7aa208952637d196e7c502f45aab1949a68c87dc9af0a357f. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZNWT2519532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a0f23e1ddb01c9f84ce46599cbf31f88d7df8f18f25cb019d1a5fc56f9e27d. 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/QZPLS2561366.