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 0xf0f04a9931e84759aaa9f70e703f3f923cd23d043fb22b639cf3ba56ee770d5a. 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/9f784ecb-dcea-48c5-ac81-726231cf6030.json and https://artists.proofprofile.net/proofs/artist/9f784ecb-dcea-48c5-ac81-726231cf6030.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 0xa3d5f0ebe3f520a9131b29d607c6d2f482588889b253c7dd15f36b643194a7e6. 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/QZK6J2313736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5be95f3dcf4be8b4247ba6c275c956bbd5abf43e62f6d07f0f731ff644a22c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:40:05Z), 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/QZK6J2313740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd890ec0543332aa79b30904820b2b088ff4212614ce8a91e127baa02e4a1776a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6J2363738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a27aca22c176d712dc3a51a1b26db50ee94ed8497049432a6dc291fb3a8a2e. 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/QZK6J2363739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266104203733976f2577c40d968d3d4e4332c4101b1e622bb1d59965b6785e2f. 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/QZK6J2363743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b582723a367263a53bd4d3e55427c0e41710506cfefbd2ec5fbaef0dd1bb4da. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:31Z), 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/QZK6J2363744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb50c68e95077183291dd1d1b3cc593387a9637a8fc4719f6135a067e228f42. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:29:53Z), 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/QZWFE2320010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf640b5462fdbcbaba3d8df9ffae7f3d095ea2fae667dc026903be5b7dc8af672. 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/QZWFE2320015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7888ba2b2887d5ec57b41534cb6aef1720d7f3b4976c5da50159e7d2c66f7d7c. 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/QZWFE2320017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3a84f9bb9ef0adeb1ed6e77c8a2c14ebb973026d24ebce17ce9e2279b9e21a. 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/QZWFE2320022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f518484fb4cc01c349acc96e8e950781a9c78e320adb14a49c9063090ef0498. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:32:40Z), 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/QZWFE2317178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176807530915679aedfee1a8a024896ddbb89c4b3c1c646edadad8e2bb0ed1dc. 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/QZWFE2317179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fff71c95064dfc82bf9a25f0b9cad5f7e1f8ab07c0cc25e2cd52c4536c3d0b0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6K2398700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d2014cbeb7a030d1d765d8e10418ac19ee44ee51b71ce556e0371a9c243d71. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZK6K2398704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddbfc9066652942c23982d5416d1fc04df663cdd08617ee6240fb9e1fcaf3ac. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:00:20Z), 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/QZK6K2398705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc13aa00ad6e43957ba591bc3aaf9ba34678c5c428cde9fb3add0fda468296ad. 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/QZK6K2398706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f4852d7c7eb845743371c280ee74703a692bf8fb1377558904eeddfb4d67e2. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZK6K2398709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c22164f67572ccd3872d6cffc7564428b690b607e9f631a92aae60f8b13fd3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTB42423855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0be21aaf82d5bd905374c891ba0bdfe2fe403c1d24c202e09134238a54891e. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:29:21Z), 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/QZTB42458023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee4224991ae9047fbcb5806dd925967bd9412bc0e43ef699c7b82702e217ad0. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:25:55Z), 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/QZTB42458024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd026700e02418f15854a1402cb995c6aded490000f55bef3f5f9e00a394106. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:37:21Z), 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/QZTB42458027.