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 0x912a077d65bcaa297c5b66afd106a05a8abd5f8c2a774456ab35598a3e4c3a1f. 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/ce3b87a7-dc21-400c-bce4-9516b89f0b4f.json and https://artists.proofprofile.net/proofs/artist/ce3b87a7-dc21-400c-bce4-9516b89f0b4f.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 0x291e3be6da0f917243d240b6794004dca6f12cafb60f4399d25d2554a8d7f649. 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/GBKRT9518609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d84a6315a3ecdc563bc396019ab857238e023fa599b3928b6a00d5b487cb0e2. 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/GBKRT9668001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa384c41833aac53318d3f5dc0d33c89063f223ff3b9738e643846e9c545aa56c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:38:47Z), 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/GBKRT9619002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21507e0c08030c9574fc7d11ad6d386cbeb6f3c66ad35d3bb4dabd723b41328. 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/GBKRT9719206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645ce824eae241e368b67229e8792b70175f3bc790c7f63f6296820f7e004dd1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBKRT0017506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaffad61a773f4ea804c28ed62815317f64fd9378b6b07b55ac553d53b6ea138. 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/GBKRT0712607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4c7fadc912e6e4741dce9adaf853f29cda7f2bcab9f550eb2c96ba00bdb6ef. 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/GBKRT0322604.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc66b2f80ec1b3bb8f49aae9fb6cfd7f04b7386f36db5656e19d6d0dda9cae7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBKRT0422807.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e34a62a39f099b0f3fc54a268b0111e44ec804bb8af728997b07015b4a3819. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBKRT0817302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf530690c415ac6948be5a74d453b54f77e0044eb86e8b27e8b1fd2b6f09f1616. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/INA381500256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eb70094128d664091fdc51d0d210f3561d6ae2c461b1ac1b3ae6c7439ab493. 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/INA381500258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f884437b6a0e0466f40aff330a81a841c8a6b1b6683de5c783393f6ff00302d. 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/QMDA62430026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab2a11f712d8201918c577fdaaa1e03062c5fd6d284099f213fa4a3c4ebe98a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX202173430.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd753183dc1710197b016382ab792a6ee523f017de08d539b83c99640222ebf17. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:23Z), 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/QM4TX2516405.