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 0x6c87ffc3ae74725e6ab75e3974a3d02d3c0863fd3cde940ec5a7f64fa665cdc0. 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/803e163e-4b8a-4ba9-991c-71e8f4cfed2f.json and https://artists.proofprofile.net/proofs/artist/803e163e-4b8a-4ba9-991c-71e8f4cfed2f.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 0xd9ea1618a21cd4182ed33d1c6e2642a04c53d76a288d09bb2e5eae7f477f50ba. 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/ITJ501600693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04471d7986f21e3e55883710e3ba5bc9c1bfb9a6ddb58e56442ac1adeca5c18. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRP3F1802730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cbec0a2c813cc3dd95ad4854b1382f71db59fad65f0734707b065fcf60a9ee. 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/FRP3F1802760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91e8e4083d1c7d68c32914bad98386060f4666b47a065ec12b0b134b2eb4ce7. 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/FRP3F1802770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f40eb9d97c88e0f0c4903c95e13e3679de7d4b1a1562c76c9b655f3c34cb221. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRP3F1802790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c02bd340a1b9c67c299a7ec1565a240b1a841a34e20e901535bde0232504d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRP3F1802780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc66faac580cc323879620049b782c6f1b002f6730f7639bf8d19630469b0500. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRP3F1802800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b150d1e417689810d938054178997d86edf4a03d7861b90f345beb87eb478a4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FRP3F1802820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6755347d23ff5c8ac2d9d1dd605408d2c3e44d8d2b5d843ae9885fe53bb8679. 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/FRPH72400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf22f1c6342bb813999b8b3bd5333d5ba105a257f1d7d9ea99753f97484c3bf0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRPH72400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6755347d23ff5c8ac2d9d1dd605408d2c3e44d8d2b5d843ae9885fe53bb8679. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRPH72400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf581d3096adcc8f3a6fc2c638d7bdeb19611098ff403a89102cc531af88148c. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:20:06Z), 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/FRPH72400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599f2e5232e8dec1ecac244661e6e26b1806284e40b611f723d74a313a857264. 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/FRPH72400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858206c0f1d2195fb61e8496bc625c97f939f528688c9f7d47e77581907813d2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRPH72400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7e1c8a53a14fa4da39961ae5f12c7b1f7023572e8b241f6ff41f7c6683b3cf. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FRPH72400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a48e621f711be8ac775a4e826fbce8bb61969be752bea9e02d362da1d17d8c3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FRPH72400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06999f2cf81c6f7cf818df29a3028f45615afb362f6424a94c0ce8b24bca9f86. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ATR981206506.