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 0xd05232514d86b28096532c89111b59de4bcaf0002f49bab2e7b2da7a8e01f201. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be00f2ec-3a7b-4328-b35c-7dbea7972b7a.json and https://artists.proofprofile.net/proofs/artist/be00f2ec-3a7b-4328-b35c-7dbea7972b7a.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 0x89d124fd94fc96b0ea0f023e231baf8c9917cc38957f4697e42be9911d5592da. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZDA42215173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaae5999020b002c427f6f31e90f692c906e40c22c0805001f32395fbd72cc9. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZDA42215176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a34b2d187a41794048382a8e03963576f231348ed0a37e9f804bd473c27f43. 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/QZDA42215177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9340e0c3e921c067941b096ddc43890f99d5dec55130a31f9fd6f3f297d62b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:14Z), 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/QZDA42215178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e973388265d09f463d993e3da92c44737ccdedfed783c0651ae10258954cf7. 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/QZDA42215179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae2b279282f0f565d6ea5f4283497c99925b681f25ffe84a8a23bccda3768e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZDA42215180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bed20863c330a7501ba8c529ca4ddc6c7687e34268e2ce922733ad0eaa9441. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZDA42215181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf52e54d9d6b87a5315e1098107ad7a5be32d4333325473c7152cb8296f41fdb. 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/QZDA42215183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff49eade272782843138b84bb42885272c7cdc25effcd7dcc96c1de22a0ad0e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42215201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77c56ab30b04ac81d4a72758909ff410cfda7d2f6d4e9876d86c5ac4e22ba02. 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/QZZ772402443.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd3c1ff064274521ce42bb7df2ceafab73faae8dae61b759e1a4709b297a10b. 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/QZZ772402444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f6623528cb410bd440b320b9219dc119e84581ed1310146cce0d8ba5da4ec8. 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/QZZ772402445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bc2a925c6550fd9dc70036ec8ca2a96da2c6db1bace759fbd1aeb02d81bf8a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:46Z), 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/QZZ772402447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cb60cb16bf90271e9a956089b5b31e2b0dcf83328ba97666a64e8cf2f2a847. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZPEW2589605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269f7c4bf417b33dd01d2f1321e40ea7ed78dcd042c84c4f2a2e3403bd7c7fc4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:49:39Z), 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/QZPEW2589607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed3641fdff3db6dca3a68fdcc16c2065d9781a4cc6b8fa057adec2d8e8c7ca1. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZPEW2589608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3bc2f4fae7e536844fce7ae99722c68d58c84ff3f0308c139eead8f2cd6689. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZPEW2589609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6edd9980f6374463c8654d3a080430e17e2a04f0d41d4f074a43919f17d04ad. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:28Z), 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/QZK6K2536531.