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 0xded3d27e36917c79ad9951972dae2c3532d9182d701e35cf5baec3dd915a21e5. 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/39c0f482-b71d-479c-8134-4e45531449dc.json and https://artists.proofprofile.net/proofs/artist/39c0f482-b71d-479c-8134-4e45531449dc.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 0xb0b04375f4f51ca1c3c17274562eadc4a1257351e2060c25c6172b5c093eeead. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN51948996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67253e036b022a75240f7e7dc3c729a20a9e44abf3d65342705c12f3d97a6ed6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYX2021932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde0813fdbebe38eddd5227e0c5bd8154117048b6312d0d19ed61b4d9b7b4df0. 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/QZFYZ2076869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fa619417b4816524869ee691c129be9f0aa7984f4dbcbc6c651037812552e9. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:19:42Z), 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/QZFZ22098863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160b75a2bc8c50777a335c62290bb8fd3bdecbfe692242628a69381a5370f01a. 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/QZMWW2097049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67253e036b022a75240f7e7dc3c729a20a9e44abf3d65342705c12f3d97a6ed6. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZFYX2021932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b97d525091130cbb3cdfbea91d6c6128bea94b5866f88817e1e95b591f52da6. 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/QZJG52100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a9cc36bb41e5c076fb003b43dbdacdcbef9293111bd6f7744ddcef8808e2a3. 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/QZJG52100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfdbfe4df2dd292c0d111510ca38b879734a73dabb4bd522ab861d265ed63e9. 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/QZNN32142802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a614698f3b7dcfa5fed223048726138745ce36d510cb52a56ae9424dab8a3e. 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/QZJG52100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a83d8e7acd5b4252c8426ac061140a0e167db7396a98e0aa9177c56701495b3. 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/QZJG52100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ee9e24e8a20c32115477a728e420d6c804386f136f86f446714ab34b091180. 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/QZJG52100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67253e036b022a75240f7e7dc3c729a20a9e44abf3d65342705c12f3d97a6ed6. 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/QZFYX2021932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993c6b68e85db4d8a56c22ec8fb9c016032967e535126abd2305f0859e169458. 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/QZJG52100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f30f968dd319eb0082771e02fa4445669331e806fb81b45fd4a2acc7bac03f. 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/QZF8N2145333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f80d2337982041bce2718510214fe4263ac170597af5d5e798a705c2313345. 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/QZJG52100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9327928d4ae82425e0859f0a5d4232f07ebf98bcf69c01554c336701c0b8b3. 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/QZJG52100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc194230df33b14a976ce70f59bd4fbca21ef667f137bd4552e63b153ffcc1ee8. 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/QZJG52100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85932533db751e6aef920813ab69f8714879e0ccbdd64ca69a04e5b2b5cefcef. 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/QZJG52100217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8873b60f960283cc5a0381b81ad7e858c3e7af9dbc511fba3836d3c5ccbc364c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZJG52232209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c00ab1ccb620936fdbefaf4546a7c6c26b204a3c06f32ebb5cb30b39b03a8e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNMW2278077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1350338588a18f62db94f572622ebcabe18a2b51cdff83a93fe074a5f75908. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZES62365702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69ad708fe320e43a635ea3b111f32eae45b5975de6594e70c68e824ad64ba92. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZES62365703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba53212cb80e86451d4da22145487a068f57a20201f1f2733ef4b03e88465fd3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:36Z), 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/QZES62365708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf518f0563f2d079ad89191349fc91aadc516f1c06fb478006c9574bee51fd115. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNMT2339918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf742f28b3b341190273cc1de504bd9b4368c6a6fc6a935812276fafd7ffc19e2. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:43:18Z), 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/QZMEV2475358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb4c520b38ad5c0e6d752fca23dc9c53c00b44bb674c67a9b891adb78aa3c07. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:34Z), 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/QZNMU2493081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee06830bd6dfa883ada1ae725b55a65e1c77c6e2366458362c83e50023e2b8d. 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/QZNMZ2406726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4d028aecb9bb76ecbbdbef23b4296d9b68249763210dd25f92e396c36d6b61. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZJG52508828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9f1f78e5026e461ebf8bf773c0e74bbbcd77702daa1cbd3af05a07a8f0cbe0. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:09:46Z), 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/QZMWW2555224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dde2875f6cfff59827108f36b7837032e4fcb5fbc0e2a0ebb13a160a0a5af2a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:19Z), 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/QZMWW2555227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e021bdfd50a5458b0c07d0cd300807a39da45a4029624b021ef859bfd4101c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:25Z), 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/QZMWW2555229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a304b57c8703f73c95d51e61e362ecb8765380b4149396a0ab01a932035ac8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMWW2555230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482aadc68e392674ec110b1c8deaece131eb760c6ea01ae084037458871f37be. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMWW2555231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7361ea66e7cd0f60ed3f8763ec9da7bf4e3c8773cdd411ec167269fef37b3007. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZMWW2555232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa76b2b845d1892cc8988db51c257f534e28d150b2385b69f03db53ceb188fd9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTBC2549137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da9c4e2bd057494851aa6bcecde1ad9308a28b223339162faf3b2a1aa134bb. 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/QZTBC2549138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2ef3fb6fd9b4c9d79d1d750673178f4d80fb308c7dde2f233e0d7a759d99e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ772529485.