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 0xc5b965cd25a401786ece53e8b267d44400ea543b9ee38850f9dc11e394de9159. 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/d8edd89f-4c4f-449f-9463-97722e49c5df.json and https://artists.proofprofile.net/proofs/artist/d8edd89f-4c4f-449f-9463-97722e49c5df.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 0x1e9b1253fed15fc570c27c2f014f10d55ebbba32b75bfdeaa3ca2f932e1e40c8. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHNA2315963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5410f1226144ba3e0d097b916f7be1b58575c6d660b6be63497756f6417eaa59. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHNA2315975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a088857dda3956b4ec1395d869796e64ef9d529372a5138463cbf947c20a20. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAHL2350562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2217f8ae5bc2cc725fd3ba13d2434ab540bbc415c6a5c4b6a652b2422c2bff. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAHL2350583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e2c7477e947a046ef7cc35525a54039af17745730e2a854df0515a34aa0bee. 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/QZWFF2379493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5c6d172f5d70ca5acf5412ab96a9c83182bdb710d1ea899a199e6cad663d2a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHNC2483466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c08529806ebb1446e99dffd46c29059a527d2664ee3b70f051566d36e2a350d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZZ7X2429116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d91227f36df5a31f08ff7e62ebaef1d9f196b0ec4512ed983bad379aea5db8d. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZZ7X2429119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc097629aa6e2ea04dc5186c3980e09d029ddae50a754a254f705e9e0494dc2f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZZ7X2429120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8015e6f27e02550725f5ff66e7fff9368225083b5bc682525887f1f47b8310f1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZZ7X2429121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c9344138f2d926abd0c1ff2bdb247b25bb9e9ce8ed4c1c25275ebf369f2922. 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/QZZ7X2429124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4626ffa6cb8171d78f9025637f68e5ff16dd53a2f10e862bb7a7b82e37ecd97d. 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/QZZ7X2429125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93219778cb2379f62f3b885301b871fbd82ef051053458ab3547094a3b32a4dc. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZZ7X2429128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c707b9962f33a8d2fedf2d1f69b4a0861a66fcc3e69a66ea8f9b1cc5f8e67d. 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/QZZ7X2429130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632a08b4f86767f05e71b7b158cfa8586bc5091f8d83bb8669bc356e747f16ae. 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/QZHN32558624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e8f27f816316860fda3160fdc8d295e0579bed19e52cb3ee114a8da036d110. 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/QZHN32558626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0377d7c9afd7d167e127752dda13b15e0719b9fec7a34aafc6901497f06f03. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN32558627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfded719226b23ed8a640498b5b5f19fd6842066767da396bd3cc1e015b77a98d. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZHN32558631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573e2fbb302a2211ace7f4b93e5daf89bd8e1b5e6d7add60d2ccdb9db5ae9269. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZHN32558632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde4f1d2c74fea5e9ea92e65344540db06e02c534d37b290434bd2858f490ba0. 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/US3DF2542693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119c4258c0bef73bfbbb0d45d1fd5abc68c5e61e803e2a1960c157b5a508e1e3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAT2514312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfff904cd811ee92d578dc0c4fdaadbe975715eb3a8393fa578b77998045d56. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZTAT2514315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a10762a94e1b072ecea698f4e33d8b2b38cbbeb5a167ec08fe5663896e67330. 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/QZTAT2514316.