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 0x8bdf8f71be9e32656d1c0a6f4cc1659ce699f43faea4f4b20e0688acf8285397. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc27ed83-c26c-472a-ae9b-f10be71d8776.json and https://artists.proofprofile.net/proofs/artist/dc27ed83-c26c-472a-ae9b-f10be71d8776.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 0x58849ad1b6b275032741620c0616ec65b180323c71b055678794d2b63bd65d24. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:38Z), 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/TCAJS2505523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9709090108c25901b51a800a507ec4ca59d3ba273641be83c34f3a340451c33. 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/TCAKA2513443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b3934b067b199d01cf43028918f19d4d9b8f18b2f62c26bbc56a9c734196ad. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/TCAKA2513421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa005569d7369e764457febaa2dbf3610e88df15ba5e0ca6a1a2327cf8ff4062c. 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/QT65W2512663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f80234beb9023f4c5fd7c65b31cb29199921478915f39ad1e9d8eda58e98baa. 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/QT65W2512751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e90e30dc905a3c3a505d42517e82f5e41491b346f8fb4468b098799feb67830. 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/QT65W2540832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef5399b16714485169dfc73ff55ad4ad383e4467a6b750d5e8f8a8d0163e840. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT65W2540773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e5db98c11abf4cf9363bb8be4b61c0a69b16bc30e4a4b4958134044bd7d0af. 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/QT65W2552930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ff1a4eb81dca41e4a176f1da154c8598e740073af850a0e46136386c264380. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT65W2552886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8ca48ac1334734e7acdf37bdeaf655a500cc293278002cbfe1c836ca9b17a. 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/QT65W2552949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780d5bd404591728b8669b6c5bc9ad34603209fe5966a151da6c104062e5706d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT65W2564478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480192493b03a8332de74ddc8a4716da1f32a33c3d4b7373ac1e7ac10b34f775. 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/QT65W2564466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a532a4b6348c766132b5c4adf854e2361abf97fe8e1474ffbff5cdb3f67b735. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT65X2500777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8521b1e41d1ace7e641e767bffb06b1f1732f19f414609e774f18236d1d097b8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:55Z), 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/QT65X2500800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3401305f98a0520ea814ac034fd5e8564eaa162f6759ebe1a14e15d7ec1e0a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT65X2500822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31c3d3ab48e4fd9b4835f89a1aef887f0873c227b1068b61507151025f3ad82. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT65X2530837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdae5a715d69997a36e0c5569786c24f29445fef44a11c61bf98a00e968c394f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QT65X2541501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c450c1d7f191e6ca9b92b42d320b267d840ce91cbb7ddb1613a3675f1c1a97. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT65X2541512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18acce54634de5d7482e64573cf85aa80865d385d3fdab04b9786a5cbf08224b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QT65X2541528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80b1901b60a198628cf5b6452aee643644a3666764cb0e001edcf7c245a4713. 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/QT65X2562244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c87c393a91d182475a8de55e7f5c59d6c90cb948722279cbf5c94d8044b287c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:23:01Z), 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/QT65X2562283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1193acba36f196b87a35e60e3c494f0c8daa17bcf0c8aa98db6dabac5f07bc0d. 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/QT65X2572949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b828984b3cf625235942753093c61c570f0035b254e60f9bdeafc318f028fa. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:52:38Z), 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/QT65X2572930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5039692cdcec6c31de22a1c36fc229dcffb1c7bb360b3753377d956b235e8401. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:42:30Z), 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/QT65X2572961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd219d33880e604e31a2ff56ca9b5896d0519b798291c0a7762f1838050ac966a. 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/QT65X2572975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d3c06520b527ed32a2b4c906990ff11d624e9384c59b46a6ebd8b9de4fb15d. 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/QT65X2582138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabddd582b076ee699ba4986848d75ae5c6b07451115b5b7001981b475b2bec04. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT65X2582108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d5cc3dd59251f242f5cc53f6bbe4cf7d71c1b45e26b86501be363d849d344c. 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/QT65X2582158.