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 0x99485825d44658ef68049c83431dd5ed45c6ad8cd3c7c44dbacba2a79e477f1d. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f63af5fd-30d8-41fc-a386-1c7f7bfe97c9.json and https://artists.proofprofile.net/proofs/artist/f63af5fd-30d8-41fc-a386-1c7f7bfe97c9.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 0x09498b460d0798ad1c7d5af0b7591b5e67feec170fe65703a3002857287f7dee. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM82128201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459148079256846ccca7825fe391d6ac454b58099b5829b6cfb70a505cb223d5. 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/USHM82128204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8993f8f5f721bfe7c20a2102361abb1eb9b3399817d594b6dc5c735336b075c3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM82128206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423bd241fa24001d7894df2d48799f7aab1b3e2c0aec7451e2419458cab0d6f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM82128207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9c3597b625bd92f13a2d8018ff18fce96b995d643ccf65071831b89960d857. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM82128209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e302ed096262feac08bbd9b1ee2833d50e2ad069958b2df16c1f885bc3f4f8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM82128210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb2bb8d0b65d244aa50d185f52b09538d23832cc51e623511dc3df5042d63ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM82128211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aabef0ff8c047f3c3fa10c3887a837452d384e7f128bc7015b9149c9a3ba15. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM82128213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef0b0604e0a8849f75c66ab227434ab04880f765fa0967c2fc3e0a39a1ce794. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM82128214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cad3c3140c30547cf0fa0b1a4dc01a1af0c4683e6d2abba59addc86bb6e48dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM82128215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ba4c2b1b4a4ce01c5188a9785a0a16252b8b7d465e6c83f5ffce5572f69a7c. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USHM82128216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d32c83aae8a03a6c395ee7b449e23865e402caeab6726c0e02972abe8d0def. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM82128217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb3d63b1d2e5193550f3242df841e1d11a784b11fd3748ea2c41efd24383e3a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM82128219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0c07ceac055b5d48651a36a5c0cff0b35ece6e01d9cfca4274f357e5d9d2f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM82128220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe415b02e111d255f4341de81debf4667fdcee4e129de7784476ed2f627a4335a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TZA1X2300733.