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 0xbd202c13a739ab845e9e8c9bf1652bed1552fe12e1a31cf65a97c6856b47453c. 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/eb4c4d64-8915-4a2a-93da-c10049ca9c1c.json and https://artists.proofprofile.net/proofs/artist/eb4c4d64-8915-4a2a-93da-c10049ca9c1c.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 0x8e2a85caef6c84a4252493eb8a47441c9c73687bb10d66b6943bdf6880737d3b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CAI371012395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de93c7a9493e8c56dd762d582f172e64a931e17d627ea4e49e9d9a6748afdb3. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:46:38Z), 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/ATN261243705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dc2c58628477834f2160626f91e1229216e8ca4903fe665378331f08b0863e. 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/USCGH1606716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5160ce9ab49f255b4b5dad0b0dc62695e9ab7fbc317b2cd01500a5aa11e4270d. 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/USCGH1606717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299056977f6a80f7499cdf6facc5a0d40bd85670ced35faefe3cd282b35068f8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:36:17Z), 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/USCGH1606720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4397f9a5a12068b9f7e2f1970e5cd8cbd5dcf7e3fb5956e4a9e1e80e71cdc7a9. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/USHM91606175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1fb5c594f3ddab75cfad1a17a2f2e88662e06e5e53d29a7ba0643276a27921. 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/USHM91606177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec849ff4f32a1e509738441268cd321136ae1606f3464d7127bdea3c7aa26fe1. 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/CAI371715836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7885ed347259a4d4f379ea69f811f22c78027262dc38a67dc3eab63e8742b6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:48:25Z), 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/CAI371715837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d8cae6dbffd805ae9440ac9d2279a6f7efcd6bc57175321dca7e5b62f97eb7. 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/CAI371715838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa194becfb14101ec43ced8324383be971c37154a29e9389d78f12110c4670a. 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/CAI371715839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02ca30d1d0804fa5b58e0a26f9fc2645236b7df224d1702513829fedb72bde0. 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/CAI371715840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068139c2a2245cf5a4f87e3c5d2ff5fa4fcc463e74c48840f5622a00d4d4b1c3. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:21:36Z), 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/CAI371715843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6610d6714089352be3dccd9f9cb077206e1b4dd2cf6dd6b13399fb68f3c68ba0. 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/USL4Q2131020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e69a755af2746e7ebdfa37b354c1ffa13a28690de56b75b47720d132926fc6. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USCGJ2271314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5e617f9ba152f246ef9b8b61480b2b45118527b57125b7f790d559fcd8cf54. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USL4Q2391668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b72f4ddde07b3098239d81e89c8b6d454b377b25fcb882ad42969ea60d065ce. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/CAOPL2390066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f780b1dd89e27f4d930a18c22bbedfc28fde03a95f5a0f99f999bf9ea7a7e7. Chain 2 (Bitcoin): anchored in block 957728 (2026-07-12T16:20:40Z), 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/CAOPL2390068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b69565605cd7f9d2d4d9a6ba8c911e8bc5c38ae10331433d9f878f9c7e3b729. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CAOPL2390069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a654d923665c436ffa94c383d5535653fdb6fa3b8dbe8a1f617524102e9a7. 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/CAOPL2390070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c1c37c4e15f9b90ad904f551d5d5bce89453679fc4ed7d49d9bfb86dae1be3. 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/CAOPL2390071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda3598b65db7b8061369d1c2b5a60bbe965d5a901ed485185df09f94465586b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:15Z), 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/CAOPL2390072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4de38af7163836bdf9648eb2b37aeb5f27a9d6db025c14e77866c8ec07bba43. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CAOPL2390073.