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 0x8ee187a73e16512a08ee9734d85939ac289a8b5ab24780ef3ea5c6fe7827b6dd. 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/d9b14083-26fd-4e9a-b426-881d4529c700.json and https://artists.proofprofile.net/proofs/artist/d9b14083-26fd-4e9a-b426-881d4529c700.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 0x4a85c75522eef2e03be74accb376926daf91aa8b7085767b2f41b5161a48c191. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTVM2355808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e2c5c03df1e4d17cb7a553b0aebc22aeec11cfb34239590f14445c522929d9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJY2337558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19ba1bcabcca38141a179915fd02d6003592945ccdbed7da2ee951ecf42be2f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZXLZ2331565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f302670a6534e14dbaa0735d05bf8d246165b375118415facfb6b7914edfe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAW2405893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd875e7b4a3bafb5e345627828ac84043d956c921379569222b96dfa78bbc9d11. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZTAY2428348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa810bea1930643abaa8c7bfabe5b93a42fd6311d75aa0c68a34ba6b289970581. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNW72349284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685438f82e67bc51fc7896a69bd4f3866e92ac36281ac6d748cd527b80492c29. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN42542373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759a20e1b02305dbcc11b3c2a51fae0eb78e247e67f98f9c659cd144f51b1fcb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS7J2484512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e98f500f6329620ca652a01a6b3b920bdea5edef00d8fd345d0721eb9110c80. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFR2495982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffbc7926671299af3c646d47780aa95f6bc67343ce2ae6e4a0a3b3b05281221. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NL4CP2421309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c962c307d0a48055b74af977db90c2e0e148bd7163afbf5ddc0d953dc6c539. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBD2463431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecc293dc94002d41dd65d0e683b65621f117ffa08f2a7daf438ecf611259de5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNW72338352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f7f1d326377e70a6f84703d2bf05a7068dbb1c02b37ce2359b076f9add9d9f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9L2373063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571bc1c87dcdb4db2831f69e55268d15e0c4dd96b230b09502f17f08a89ee870. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD52323289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03755848a437eeada0e0992e80248f0c9cdead31bf60fccc2fe621932fd33692. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZES72369716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee78987dbeda65afb3593eab9d9fc9f7f6d15846e669bb3ba3002f57816947c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZNJZ2303787.