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 0x291f3cd5d2307066b01f2fa1b7d560b1ced3d329776db2c7187d4e9dc691d62a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce4e3123-ddcc-46a6-baa7-52c3d3cef7a3.json and https://artists.proofprofile.net/proofs/artist/ce4e3123-ddcc-46a6-baa7-52c3d3cef7a3.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 0xdfea6ed0188f69b79a37ab402f975d3961dd903a38282ae8d3b38cc3f38cdce9. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:02:17Z), 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/QZP7F2558373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee256b36d1881c778191402d68d8581d9a5efc2bf84967dce5e89751a57df0e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZP7F2558374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a857f6091e96dc1f41dc582340780992d841169c55df17c3ae01f5a2b33e086. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:41:13Z), 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/QZP7F2558375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b056634d5801164952a2110f23693e2ee2db9a0765e8313eacff45365e0da1e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:04:02Z), 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/QZP7F2558377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3138fb3f6355c73c97691537f62f85ff0d3c7d69d0f9554e34486863810f7db6. 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/QZP7F2558378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48a1b7c76a9159f5d78b9aa1060e1c3ccf2ed88663913e5e38f52c6c952757a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZP7F2566693.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70de84fe537c82c32f0f57f4d55284c922913a84b9da10d70ce6978e866ec9f. 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/QZP7F2566697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed81f2e834f0d36c287c1f7489da2b0225124c014675525f29112e561954b350. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:20:46Z), 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/QZP7F2566700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa295d21a009c46f9ae16b5a4c4b793d16cb3ce921d1349bc0c4448b91f65c27f. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZP7F2573516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040392eeb1c693f668b5962482a006b960079eaae9911d58401169f3ce5551a9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZP7F2573517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad75187fff8384b159a44b54334c0ccdff6cbf49c8090029235d9126ae657c10. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZP7F2573518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e335196fd422d1a7f57b8e710db03d8cadc6dc9121fd748c098a3a03bc554ee. 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/QZP7F2573519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373cb8ba240f80a4e5033382dcb5431d55605eac4ea7413df1a456e258804480. 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/QZP7F2573520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88af2c20e7db57a17a0f2513f3f1de0f39f09a61f45643ff4caf5d3b596c199. 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/QZP7F2573521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c3fe04473b230d84c072a656dc9522c5b6f59f004a4b912ada037997236374. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZP7F2573522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb475adc08c285e785ba8185458928b5ac297d9195f6a318ebf9762a31135e973. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZP7F2573523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539506fc8238f1f92895be042d34fb737ec3681be48252e21dc7a49976cdbac6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZP7F2573524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e24cd7d9c41b0b1e2547501b5be4f30c51b9d7978c05bef4ecfe262daaac95. 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/QZP7F2573525.