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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8b0448fd03975b6bdb9e76631f206c46c3fe5005d12ad142c8664fba9b860a. 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/61e1c724-3c93-4539-9c5a-110d9b161ca0.json and https://artists.proofprofile.net/proofs/artist/61e1c724-3c93-4539-9c5a-110d9b161ca0.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56392dda1031254f7ba0391dc064354b332d28bd551d5e69f1b9fc2fe3d15ee. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZL382086277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62b4b1532a05465d542b2e2095017cbcd566bb59766dd039488a66e0b610cda. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZNN32110371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d0304e3d9ee7e5a903e9230a38afa569b308b774b8d5b627677e736a8649b2. 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/QZNN32114386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51c6f98fd71a2e5d9dc111a65ff761fbf63d24e4315f5ee528266ffbce5a584. 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/QZNN32118516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aad9911715319d4abfa773dd51e0f08e4c237cfeba4b6892bafa7234286b0e8. 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/QZNMT2154971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030363f54e4756d6d88c3e942749fb1ae8c1decdc9c6ee92fc3b8038a2d1014b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZNMY2166498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf478ced507db994d928acbd44fff2b035d9d5d0098a8a43a2849d25c792eea2e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZNMY2166249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b79da5c3849964db975c4b7c0635b6b0a65c01b16d032e63fc57e73f726dc8. 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/QZNMY2181602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0185b7a848e9a50d17907733eb5e315b4a94bbbb2a09d76835c78fa6d547dfd5. 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/QZJG52200815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c3332ee70c1dfe84b681bfb541a711fbc87f0e080ba89e5e8db2844ef5a1fe. 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/QZJG52292637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dccf95cd9bec431590a4450fd7a363880efbb83dcd241a9b480ed0f5bb5e8aa. 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/QZNMT2238531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1b6c4cb59f545053c121820fb8365b3f56395a9c3bf910e0315d5900521b35. 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/QZNMU2276698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb6f7ed18091c949b7e37c6415038c81f2061fbc3f6f3c8d7ccd4bb0fcbbe9d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZNMW2231153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d44966d64e5f759f031dac01928b3a116f3c9277d2b3684b85883f0a9b29fdd. 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/QZNN22234938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363d545ade20c334021cc86dd6e12450d15bf1466bf7bb14609c29e5bf9a45e6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEV2360249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc766dae588735b5f86d79747d0a1cf1a88b50b6c552e76c2d19f5826b1396107. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZMWW2325629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9f3bb8591942c67d2b5fcddb5f9326503f4b3be0bcf1cc266e09125cd2d3d8. 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/QZNMY2367599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebeb67df10ae90f600a592d9e71d652715664344e0f18c5d739b67c0f51e75e. 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/QZJG52486167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa901a4242ddfc55619db5380b67dcada4f97ab70bbec5cef480c9487cb5affad. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZL382423805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d61059d6c9da99cf1baebc68e644534f3c70dc953350b76b6cf0873f5d8787. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZL382456444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad72d2ef0f94fec7370ca8c1116aa91619165f5709837efe0e6f62680924eec. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEV2456496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ef903ed475a182940978b6bf4b148d6505214580f5ea02cda764b9749e108c. 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/QZMWW2444882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf99631599580f0502ada6dadee67e93f0ee9dd9b468f256a57ad5d48bc94f21. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNB82423534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b048232425f5b808ad005a62c8c5de5c68eeb3218c671b2611cab93f814312. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNMT2422787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09bff9845d7b23407f53709dfdbcdf1abc22b03db532eb62ef17ec31a2b34d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNMX2472708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf923317c254da09a54af1d3e4db930cda0b8f003c7dd6a580a77af765d7edee0. 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/QZNMY2411449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdd08538fa9051c314013e09ab6ccb938570172bf41d40bdb3ef2dcd6583900. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZL382553351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113491e8a29fef2c170ebedb9d403dde782497c3fba4c08c2f5386c61c586398. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZL382553348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea114104e2a2bd1034eb569654dc8ab52b44bbf5fc4b1030d9257eb82fb201c. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZL382553350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2effd102d6a749525b383a5964a1146520ff0fe079377c6b2075a26a2786dedf. 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/QZL382553352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fcfea4b6da17414f77db7f2b9a7e1efcb803caa7f8338ad3c4f7b13f35fac2. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZL382563201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56112decdf0242c250782ef7b90d999e97064dd36d47d8fffd944c3e32b7992d. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZL382553374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd533da09bb61f34587cd6952418a7e1a892168b67099b8ec5593986bc7add1b1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZL382553347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d4ad8367d514c8510e63fb92bbdceec5d44f93a36c5ec7d328731c2f3a127d. 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/QZNB82566366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124640cd583ca7fa0983819df93a8968177a07bbb5d5c976d20fc6b8f22f24b4. 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/QZNMY2518857.