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 0x2a24c5e5591fb299cf0304f368b699f4619e7c1b56ce6a090e901365f339833e. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fe6fadb-e55c-47c8-940f-8f618469b1c5.json and https://artists.proofprofile.net/proofs/artist/9fe6fadb-e55c-47c8-940f-8f618469b1c5.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 0x453e8c6ada495da14e30817de3ce857be24961065ad8d5464b488acb7cbb3a1f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBMJG2308456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5ebe8a494b383720f4e90c02f22e86a5f6a91e34438e952371a31cd9b48f76. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBMJG2425927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7840a88d607f5fe96201264b2a52dcdc67eaead4cd18ddbbebd926f511376afd. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GBLFP2592138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb26eb9d09f8902144fc907fbfcd0b9a6a6e7360da6a28f6311c77282009049b. 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/AUBEC2599546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7840a88d607f5fe96201264b2a52dcdc67eaead4cd18ddbbebd926f511376afd. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/GBLFP2592138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb87ee541ea588c8c1085f0a1408602710e8854c9cf58808d11c8cd636146ea. 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/GBMA22598388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5f27e7917debea7186c7240ffd282a362669036b469764f8a5119c17b7b06. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/GBMA22598389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb174f31c6e57af170721d14b992bd938ff53844850c776b46510e52092230c97. 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/GBMA22598390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599838f1ee13a673de524a2a3b36829d77f1b0155786a3663153c11985512ee0. 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/GBMA22598391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4694f809e988010872f2e611374c294cdca0cb95d39ee579126899f9930ed56f. 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/GBMA22598392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a4f503a4be1ab2e1557e39b0c65f8254f8104d317d9e10526686324fa7800b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBMA22598393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98aa5d22e9879144ba2d563905aad5c83195ac3567e5217a95683ec9f802234. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GBMA22598394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb740dcefa70d9dbd80ea0684a49f919a58d2a93769400a1e167045a7eda6eb. 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/GBMA22598395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fb55e08ecc12a37f5e416efa5ed9c9837198d09c4c73cf59057dbd71efc6c1. 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/GBMA22598396.