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 0xf02d28afd80c83aeccbf3cc94aca20686f4e5c756e4a6a0d28395d4cbaaea21e. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a110767d-1ec5-46fb-b19a-3a715b64543a.json and https://artists.proofprofile.net/proofs/artist/a110767d-1ec5-46fb-b19a-3a715b64543a.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 0x16df336a307129fb7d1ce2f2c3a19f8b833ea1a3fd366990eaa686342c1fd69f. 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/QMFMG1459814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71273c1de4f55ee947be16920f403b53661a6120691da3059012ae3096f47e7a. 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/QMFMG1459821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a666b7d6c536496cd524891e6a92347e3284c4ef88f57636775b98374f4a83. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:32Z), 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/QMFMG1459823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa91c39143e46704275a5e96359443c234274d27bf91ed34782c336fc0c46e5. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:31:45Z), 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/QMFMG1459825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cd61d9b3c41d9ee0c5f0ea27fbaeec038e830e953f28fb6b3fc984467d5de5. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QMFMG1472892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98c3019adf3b35348f6e211ef7e6cf0a0697fbd5414444dc52a73601e96c35a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ARQYU1600796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d5d3d540563ca706897c04f770e4fc8ca0011be389ada3fd1c3913f3805d1e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/ARQYU1600797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c562bc36237a1d5e61d78db73ffcdb3bf6a7d15963578552996c9396b4de518. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ARQYU1600798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7fdfe37b3f061fa852c887a6edca968906de801917efd307e0b4486c216087. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:09Z), 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/ARQYU1600799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020d77bec8f58a5a4368681ccd5d14d12ca2f9a4cb89622c06081907f17cbb2a. 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/ARQYU1600802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec9f5436cd3c8867d82d1db4411f79c918e4311a69db901b66e23d64471dadd. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ARQYU1301804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e772a15478ee1c9bf5c287d875a8aedbab170ac78fc7907d0066a6a7392c2cd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ARQYU1301806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ef0475364f791412faa0abcf2516b698d9baa8ddb83f6c961dd4f7eb20bc3c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ARQYU1301808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa878d622dbf06cbae30d6e40b2364b25652dfba12504d661b2dfb17ea1004b5f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ARQYU1301811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18773acf3133e0dc160a003e616b5ec72f52cce2b006fcb3a67cd9a2cd7981f5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ARQYU1600813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08afbcf1b38b7e4fd1a89ae38131a1e4960797c5160811e26ca83854102d223. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:14Z), 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/ARQYU1800239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa825554a9eaf364be8ddaec47057b2405eca5564582b25e28071103f81fefe. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:51Z), 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/ARQYU1800242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a926f570a626437143a7cb4aca114e77573c2eb8369c82ceb7a5a7c509a70b. 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/ARQYU1800243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1f7c137e287d420e8e7d63a11875cd247f868137b5bfc723ec8c6c0060a767. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ARQYU1800244.
46 Certamen Argentino de Doma y Folkloree