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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8369b00023ef0239833190f4af7a8b6bbba68deabd27863bbefa80070671d399. 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/ede95569-9d63-467d-b2e9-13d6214f3872.json and https://artists.proofprofile.net/proofs/artist/ede95569-9d63-467d-b2e9-13d6214f3872.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d102b1713dacb37f4459fe3c5ba10a79dd12258a331d720f037d591f97d133f. 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/USANG2195865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84de5cedc050f34c7f8355811783e5069be3cb8b6b3b6a6a4cb296878fdd08e5. 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/US3DF2160630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f78536954e922f38d3fc2c302481083baeb514f23ebfeccafaf471f4369d7e0. 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/IDB832201073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263e25b3e582b98aa1ba964b33cc57c3771c302e5eb699043a2f2cf7db194edc. 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/IDB832202592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4c52c804c9fb439931ac80f8d548406adfe09f7f3c6d326040cd72b55ed9cd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/IDB832300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12ab4fac7202cb28d3503261bf8e894ee1b5bc62e99dd6d2f03b8a5d2142bd4. 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/IDB832302279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3e98ce843c39d5d176517df9e4a74e5dbacf6a73592e459fd7f1e0788b6908. 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/IDB832302348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb33db172c7bd74ff2c70b9bdf300a801e298378be22a48f644f7fc23219022. 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/IDB832307284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe925eb5cd8d6ed88d0f8891643810a16e10184e860ffc6bb3499306e3b95e94c. 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/IDB832400839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05975b38000ea2892552bcccdc2b2d44d1d34be78135160b3a630e0fd8862253. 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/IDB832501081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292183556a81713058c08477015f00a9b4de41b9ab9ee55a109d525334991f2c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IDB832504545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02c1011e99c1b71e2e10f0f516d22241067deb676a11c5c5c04ab9b1c92e2d9. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/IDB832504984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc012c0f152fc85ae9b81862c35216b72d900b51f3f2ca37df3b6bd9bf796bc0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/IDB832506509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ba7ba7855a3981e9a52b2dbb446ef607b91c2769399edd485fe0499239603d. 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/IDB832506510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5121b5eb8c6dbb6b560ab5f83b12bf3c3371c5025bd0ba4f988056c1874602. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/IDB832506511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2ecbf747e090492e27256a62afb4be843015341d005fcd02e5344b566ece6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/IDB832506512.