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 0xd1790c353bcd8c93788e1a6decb2acfff8ec627b2e5c78a45f2a1312b9de0b2a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9100febb-ff11-4046-b20c-687533d25aa5.json and https://artists.proofprofile.net/proofs/artist/9100febb-ff11-4046-b20c-687533d25aa5.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 0x134262a63de7db35ca619f6b33109258ccd7d7e6867ef0ae3c5bbff21493882c. 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/TCABH1256487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8abc99605c06d6513d1e5699066251b11cbc9c37f538e010ed2b4ac8c5e6e0c. 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/TCABH1255822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66ae6f4b6150fca888c71c5c1ae9e2adb1f4cf73047d59c5a0d14febc121d63. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCABH1255828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6a2dbc767c1171a032daadb4d32a7647cdfb994c81441448594ab0e9f4a3cf. 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/TCABW1497920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cea35b3ad88015d83da8f4f1f07931824c8746fabc9c44b76799b60122f136. 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/TCACF1572287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d0f6c74e95020c6614fde8b2efa20503d2640dc153aad1daa020a489081125. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCACF1572303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5548d76e7cfa529a5b682e288009eedc050de21f2b8926ee4bbeb8e1e1635b. 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/TCADL1840914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0897610e523b13c121f4a1fc0532fe07d524d79535a12cff062994b8418528. 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/GBKPL2204865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f53c4cf7b90a6ef4083b6b6c4e341f67bb4ed60c3077a3c97a4c474c3d72bfc. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZSYP2362373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5167088c7769d48f08d9750affb8d7193ce38f3667a530eacba51fb4acdece. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZS7J2303859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68338a963fa89fc3c789f71006feb48ca803a3c49d71a64a8bae274afcf9280d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZS7J2323850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1831bf7b37f61cacd1f7694e52f28958c334e9a577506e3193ade0a9c7eb4c. 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/QZS7J2313313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0615e3013af972f8a7c3efb374359f645309656b9db92b2df351bfa1d5d2e556. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZEB2419219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1522d6882469bf60400dfec6843c6ed4b07ba08805352cd41252be062a4cea8. 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/QZZEB2419222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f239842206ef89b5a81a2809f85d7ac9a4cf1681b07dba409cf8716806e86ee. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:20Z), 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/QZZEB2419224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1eb1522e7ca64d22ef875081fa8da933129a544883fefd0f50b0d282c2d3e8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZWV32441315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1817a72f82b9a21d3a04d764b41768ebcf404d1136f657fa7fcb7a57f69b9c6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZZEB2419255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dac41f7f4c6c46f4a8f23750cb971da1fd7652cdfb563a37973cfabbf058b0. 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/QZTV32506254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec000f9982d32a3c0184c773d0f7b64d50f4ea76d2736e559285228a4b2d78c6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTV32522480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b0ee40ff52a1baecdcc068e35fcd37b3ff28c8c904ddefefb5bc924e7c402. 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/QZWV32518330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d4c6f9b7d6e481ce64a9a1c77bb0e71a51b20f0c4bdd8829c51ec4b024f59d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEW871811419.