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 0x2c60145e6f3c2b983d034039088d0d9df824980837c250870b6b925489f05321. 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/2b28e103-66aa-454c-9135-eb12298a4f94.json and https://artists.proofprofile.net/proofs/artist/2b28e103-66aa-454c-9135-eb12298a4f94.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x5757ce34c25697c831ed689e3d913f769e7e1785e3b18dfda2aa37eb46e5e260. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZP7F2459049.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aebeb1f29f69fc45f0307bdd1986664a101afc4e56ecb3d5c7876b52b2e402b. 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/QZP7F2498540.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd517d08d981032380adb209631641872198db5fa638352f91c1771ce356d9233. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:44Z), 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/CAWK52411749.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d65d8ed072fac467be44aa7d5db1eb2c850027092f366c3b517bedc45ac000. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/CAWK52486669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec48ad85d40ea5c414f30ed797712130e496c4549b9a32feac2cf3a30838059. 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/CAWK52486670.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28c1fd5ddeaa640d066cf04fb62ef1467e019cabade5516416a3727d42ef48b. 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/CAWK52494388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f8f4b5d1fa9482639c56a9a090a4b02f415d06e34caf2cff398a8655f68045. 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/CAWK52494389.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f72bd7220c6cdb7094dfd8a3872b79b8bae5d9eae9cbb2acf156d7bf023852. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:29:23Z), 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/QZP7F2516651.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9d7bd20897b5d38d999c0a4b09e6e7fbaf195c924a1c1d809dd4bbc55d1539. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:27:06Z), 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/QZP7F2523421.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcea385f01fd109638427cb843b882e10cb2f7325f4e94d77f8cbd7a92ae2985. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:06:00Z), 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/QZP7F2572687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5301c9198d142f292181e01fd9cbcb9c1cc1411bb353b195e8b00d430dcbb9. 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/QZP7F2572688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ff0df31da8ff0557f629959a566c6b69204c3e886ca23eaa30aeba0c7c29cc. 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/QZP7F2572689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2cf79429e29995f152ded403e2c906418d7120ee0f0f8c1ad3f867eaf47f98. 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/QZP7F2572690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fdcb6f0600667c7529dec32504b7c055bf588d0e72c09f66b94e05c4908451. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZP7F2572692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc1f185201c4829a37505ac9781023060d4d5d70f3682e6f87ab199d43b8a98. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZP7F2572693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82434ecf41b26050a1b89b5a8da137f16f1f243f0e79d402cc5ebbda413a41a3. 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/QZP7F2572694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22add120027dbd33adbe23ccbe553b546cad63e0dd6cfa44c5cd5b661d12ccdf. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZP7F2572695.
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