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 0xa7d7d8358e42bc08809d57bfea51ee40f2b51803336d176c59f39d20a1d3e773. 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/e219f630-cad4-4695-938a-d57c4592b062.json and https://artists.proofprofile.net/proofs/artist/e219f630-cad4-4695-938a-d57c4592b062.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 0xcdfa80d26de6caf72d8acbfbc4bb746a8d29a690ffd1a87947c5f06f045017fe. 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/QM3DF2198589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115dbe683a0bb94e5e0a5b2ae6beca996a8408b8697338ec27ba382f60bfb9f0. 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/QM3DF2198592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e832171f7098b643d38640f97439232baae3a895ea7fe21768554d2ba8f6fe. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:00:29Z), 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/QM3DF2198594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e562d3e83db38e0c590dfeab9732bd908d6f9ba8a5dc53a35fb55431a22f6fa. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM3DF2198595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37add00e9d9765b1b902a68bfd83269b762a32816d2a11034f8b6d7a938faebe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM3DF2198596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6609d8accc72739a21b0be46f4b147b1dbff641843584698390e6575cfbcfe8d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QM3DF2198597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89af81e4179ae79dbb07fcd9acf26673fc1e0a48b36fd6a13f7f4996cc86fec0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM3DF2198583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f80388254791ab164815b60926ef1d5ab47299232c7775b5a169fb7d59c44cc. 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/QM3DF2206314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733c59eb27391aecb32daa92dbe7540584e3cf920c8c240909b9fe1d67361f42. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM3DF2206318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744ac2657c14d8737f1bf3d7ae10142f5c3aaddbc65403c77482dcb50633c36c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:58Z), 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/QM3DF2206325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3afa7a35bae76994c6e92573a4643eec532cd89a4311783dab843086b483cd. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QM3DF2206328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8804e0425039b3e5ab51e62fafea3c8476e5056386be1a6bae45139c4652f537. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM3DF2165160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbfdc1fc213e80d1db2505fd38a3579b01832e75ecbec3789ab98130227bb2b. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QM3DF2165161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b3b1183744e32cf1caa3b22eb9fcf45ca66e3aad869b39d7d00a492c97d51f. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QM3DF2165163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289d7642149c8434868b70800b14b7b4d9b6251a3536119f08120f2157fcad97. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QM3DF2165168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b7e05c2c7ecfb1c3edd003aaf4050ec9e62d8c9508229a1e2d0941d6eed166. 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/QZ2J21512875.