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 0xda9aa723f63da0996b7bb4d8fd45b15b14bd937217e1bfaac44a19273cc6fb1f. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f632e6ce-bca3-4837-b81d-51201ac77c37.json and https://artists.proofprofile.net/proofs/artist/f632e6ce-bca3-4837-b81d-51201ac77c37.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 0x6a7548cf36d2a6f1fbd23258b725ed0cb7c2334708423577b57973ae185e7eca. 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/USDHM2033408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed897a0b58c14c05ff26d45e933b7870f3710656e734414715102b864e6d5305. 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/USDHM2033410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3992452d4e9345764832689a6c49a0844e9cce75932805896b949938e13e22. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:22:41Z), 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/USDHM2033411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c43e03bbe7d4fa141143a3a4c6445e04e177aa4f4836ca7c8352a74808342e5. 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/USDHM2033412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9e09c15336a1c87419523d7c0e56a64867929069d2a4548194cf71bd669d4a. 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/USDHM2033414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e25597dd24b90a950947351ac71018772e6b328bda11e38e3cdb8fa7e881e9. 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/USDHM2033419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71837d84ec7e40068714136c387d4a88a1b593115088452bb010cfca2d6227c5. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USDHM2302760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78aa261d88525fade2e6af88b94477b1987a3d520f258e88a9ba1eb56244e011. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:50:08Z), 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/USDHM2302765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd36c74715dbc29b439c0c36ab220374c803a9dbe478949a7828e2bf21213d0. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USDHM2302766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ef1001fb9ca04476ffc3376d61728febac690e0ab375aedce3697586914ed9. 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/USDHM2400871.