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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 0x483bfedf2440edca820dd6d79e2e3c2af6e1ca07c5d561d169659e749439ea05. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c869269-c772-44e3-80cc-b4ce2e0abe5d.json and https://artists.proofprofile.net/proofs/artist/5c869269-c772-44e3-80cc-b4ce2e0abe5d.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 0x74f9a0554b97482a5f5ea9bcf9c8ed8605da8028899d23e8c4e935cc315c5175. 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/DEWA72200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ec1374307c8c7324fc4f0af58306f5fbeb705886a6b89d9412e0efec272a9d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:33:29Z), 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/USANG2243475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d31745a27adcec90931bfb01b1bf12397e0272aca1414467e158e5f2be31296. 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/QM3DF2247715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b07a04b5f9d0aeafe41e3983f5fd28d3c380f56d080708d9c0037e56b9bdc24. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM3DF2291192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd52934a550eea3123aaa375cd7ac39da4078d342ace300df6e53674005bbef. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMANG2253339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311286ced24426413ecb746959d0a7c34ff9a30b3d1d17a013d498ecbe2751ec. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:17Z), 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/US3DF2431974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7ad84068467d05b198eeab09f43b427fb805d410786e9b09b93a827a608372. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/US3DF2453263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27291d7d0f906a19f58f255095d14ad4520e60c1616ccb4ead2bad420ed5d86f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USANG2417530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40056634780d1a6963c431d0d8f92467ea5314eb57b52a26fe9cd50281b6370. 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/USANG2428664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8abc33310ad3eb2595b39dd47282941213b5cb1142ad48e4ac2113dea583414. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USANG2457400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d418218fdf0825cce7dddef5dcd119fed451690fc279cdee867187185b430a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:02:35Z), 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/USANG2467581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3b85fdd8346af932a8e3d97c9eea43448fe0f53f1979d6cbbc70b0c5d3bbf0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USANG2473133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228c4e9047af82044ad710a66b8564e3788dea578a7125d80b1f7714edb87c5e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USANG2479017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1092702cc0642713949642b2380229661743145b40537e2bc975c9ae4c9bdb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2546949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98a6c485eeae862d890820a51f70b43cb60c635312dbea26d8f3d836fbee379. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CH7812543550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c66766571308ced738533f5e72a1e1d67d9e95024225c681e6e2334be8ffa7. 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/USANG2242005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d1f8dbf3b407b5822ec832f72efd6a1d6ec86c93cc4f3931ac8ebb870f6fa2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKZGC2407070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9361371ef5d1020d63b361b7814a9c57aeb9b9c410cf67c04b2dd9466abc807c. 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/DEH742431749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d61bc70f98592edad777a7bc92ffce5d18c46458d3a7b5a59946fca7ffc4709. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKZGC2407664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048414fe3fede5b92206122f08adb9d810484a1fd652e00d483582b2e52967ca. 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/UKZGC2407680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c5a4336ed73f0dcd77a16fe219519877f264a91cee5100a65b942bf88fbfbd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKZGC2305329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f156ac6487c8d9dab675978f268eaf596b980b261f4731bc36cbf1d05a51d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2305336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cf586c425e86ed55d39125a3e942d677d6dc0716a412049154d3f022042f71. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKZGC2305344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530b64d18555f7cc3e1843e07c1ce2371bf52f0bf16c26f4bb904c956db344a9. 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/US3DF2528952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7e6c5444b2344d92fcf2127917ff8d8ccd408b684712b44470f841f38537ea. 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/CH7812411106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f01c269fcbc4fbecf2fac0a74f6e8f1e79928b42f470d4f96612c4d7cb2c2e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3DF2481614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f262d1c542ff621908d883125657b266c7a45542d112dccffa99a7a17381565. 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/DEH742410292.