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 0x8224e13b7a2c7912f67307b004ca8c8db5e25c2b4638ea4f9b368c70049fc8cc. 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/3ed27619-76e2-4a87-89ac-00d17d9313af.json and https://artists.proofprofile.net/proofs/artist/3ed27619-76e2-4a87-89ac-00d17d9313af.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 0x92ad8ecf47b681eaaf6ba720abb7ef42cbe621f50ba7df8ed251f2ed1e3bfadf. 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/USHM91487658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d8af6fc3c2b413df341c5b9cb20594aa8e8b0e3b3e5855321ed8222a4d6104. 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/QZHNC1915954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136b261e366e494ca04317e53fc559d8c900e2444ec42c08dd7c71d5c7486130. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USHM91491477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577d055439dd8b5adf92903bc2dab115d5c7c624b16ab79f9dbb9de279a2b479. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GX7852400473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67850134ac744a53e5e82d8e45b1e8cf40d753d4a79a4e5188518894bc63905e. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZHNC1915095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ebbc73728dfe033355576ad845525e168538e088f3b7535538a218ba2ab67c. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GX7852500428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf06be29df523328826eac44316aeabae0d7a5aa7103bce385bd5f00d5802ffb. 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/QZFZ42033338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf664c3b0460127102770359fc0da1e31332ebd081602e6ce5a7cc63348e2b633. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZFZ72053555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2244a3422d1ade09181fc810c052b0707eb7a4fe7594b452f0524e4c6df0366e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX7852500469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5838805ee46ec78c581391042a4d3424aa1a1b5cf49e6ed4de4e541f732e44a7. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZMER2042971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdb720b1bf8872998c58f99c2881752dd3abcd2becfb57d6f35b7acad53e592. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZNWU2033682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb103ac09e65f3352d173a5eaa57164f82b5517e44fb4399204ca772156d806fa. 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/GX7852500480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4622139878cf34733601300d601f86964f77b9e92fdc11395df00ba58605969. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWT2178936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f8da5054f7943d535fa393386429abc297d16f9e2681eee40e208659654f98. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZTAS2179676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b96d0c9e64ee071cd43065776e8a8da906a9f716ad3d25ef9567a2cc84e39f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GX7852500471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05faafcac101eb52921ab95c9839bb3865227a61b8295e92265d4eeb4846256f. 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/QZFZ22241276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3e5f6097c9ced7887d88e82405e6c1e0f2f563b30a5e7bea1d78930a83db81. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZFZ42284677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2236c81d16810b5c6deaced845c9a344bcbf67a75652fa34e18ab33f159e2421. 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/GX7852500488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6885f08098536c8c0bdc238b60fc46fb81c460b1261f14e3f99083384e14e405. 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/QZES92249655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeec8ff41a221cc9d7d0e1093103543b562f4ded57e89de55727677985dc482e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZHNC2295998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba41a909e273ab341a30ff67e887f18ba436d95ab464c16245337d059cfb737. 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/GX8KD2282829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b3469f2459a6d5cb4aef86632a0a145952fe068593f2c50955edbcca6be0cb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB22212725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7e276c0e53b7d34ccdbb49081977aa848c3afc902ce46ac29e4179662945b7. 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/QZHNC2392052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934fd29a68a9582aae70ffe90317abec22e4402794165862fc215636d7da9c86. 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/QZK6K2355080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8fec9c3ab4742749d4ecee5dec6fe50e258532c952ad41879292d19f824199. 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/GX7852400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83469489b54023e960483026371f921b3c2241a48f18e8ea3e8c39449123a586. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWS2360239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ba267142d9ec54c0f28871f526ddb6bd9ccb8542bf17e5b57c09ac66be52ff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX7852400367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b897ef4d9e5cd24bebb24e2ee1dfc62332872f757c664431925e84270f4e658. 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/GX7852400368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9043acc9cc7c27921bea77c68560793d27341a076deddffcc3823364f380bd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX7852400464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc046e801dd03ac62174a882a577299be1470888b07e8304794acbecb8feeefc4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GX7852401394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5902111618ed1e9de029e90a0f6d926590d53a0cae177fa2b6d4ac41bee0a99e. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/GX7852401506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f880ea2d150ebda17f72fc5af30bcec1721ec0f85504dd315a8d563fb32349e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GX7852401509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cb91038be4c78b4ebfaafc75dbf19fe254d7ae7e7c30eca70cca1c7948844f. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GX7852500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e9aa2c58e29727921e299f260fc8e1b432287c1f889eadb305fda650e21993. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/GX7852500429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df9974384c8ea55de56d42fa228f6243468d896376fd841cab119686e414bc1. 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/GX7852501715.