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 0x4c8447b6dc481842b4e8163784f76aff4cb7f3bec0ce50a5ba568b287bd828c5. 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/2525e037-9f7a-4fb3-814f-206a14c0ccc0.json and https://artists.proofprofile.net/proofs/artist/2525e037-9f7a-4fb3-814f-206a14c0ccc0.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 0x4835a6da8f735e7d2a91a906f82717ab412e5c94b0a99f481fc005517a16ba7a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6G2392688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72c38b2e37c37433281b470ba2fd4e83705de847bffcca30d5dbe1cd6f0bc35. 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/QZTAW2318613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2116e5ff11d1553aa860d67b981f3d46f83601d987bbdf55246b6aff88a0b12. 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/QZES92455081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d30cd5acfd669b99eef20d411951c3ed155f34c9d79582e24a7e4889d77149. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN62454704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52ecd05fa347b94a8e50f92188b126a85961c5228b996800ff0919ab53d27cd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZRP42486816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c93557ed4b5ea09517bc0e3ef2759586e1960f6aae248a718040ac8d94c813. 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/QZTB22495041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44d6e062aab961f6279d0cbba66227fd0afb9d1a30d4d590304b4de78a6f7da. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA42563315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34f89746c977a8c7ed4061409f236bc0befcd7ede8f340dd047b8a3ab5f7fe0. 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/QZHN52595218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c19fef10f707c4ae0bf10d89b50b90d3443f9616f4c1cacee320c3a7da42895. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNC2578609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d8f6c41decab42e4985e7bd2a6e845b4db578e39759900016773eedf19fc60. 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/QZK6P2500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4a8a01d9b3b7ecd575b9325e2d50c85fa98728c974b4440d41628e7c4e4069. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6N2576290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259a192448b301a5231b3e7227d1498ef75dd44891a9cd69e8529c673ec49af5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6J2530634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac044df76f63dc46194b116dc4d6e731caf00b79213218257ed53fabdec7d3b. 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/QZNWS2541822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83afd95b6572d7fc770c03d427f71192ee5d78376cc941b8571397395f4d0003. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNWV2542812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bc3a0e806fdba501caf67b3ed1b99705dc35edbbc6ceda0d326fed30370a20. 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/QZPLS2556938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1f2506247534b1347d54c65535921f980337c4f7f1110fd38f0c5e3c8887b7. 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/QZTBE2589012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9072ffc525784996f52e1049f825ff4ee30ea6cdce4203dc66b256f64a4971c4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFQ2580555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaa5f811b45b279dbcafdafb812752b6efbaf9c20dad1dc7bbac5f5204d2412. 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/QZZ7P2533612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a105837119875f9127bcd11379845a9351fe6e3861d394f33498c7d0e742b4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QT3EY2560240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0f102378ae20291c3288d568d59fb65e7798b420127647c8fcd5d537a75d17. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QT3F92573347.