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 0x4b20d47c953a3511ec131879a7dad0dd5f86b2927967f73f137384ad2d0e26b3. 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/bb10c0d1-6a71-44e7-9a49-c77ab692b4cb.json and https://artists.proofprofile.net/proofs/artist/bb10c0d1-6a71-44e7-9a49-c77ab692b4cb.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 0xb2bd48f5ceddf02c43a7907e5f9ffe69e6960ba3414ee691b3c151cbb155dc22. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:32Z), 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/SEUM72000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b10069858428e4491b0c9deec7d452ceb1b3ca3aaa9d497d64a4d335f1ae802. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:28:53Z), 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/SEBKA9322050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb43efc885710634fb0cf35058dafcaa8ca2c45f4cc91453742ff69a5adfca0. 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/SEBFT9322020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0643717cdb56332d08a02e4fdc4b2eb89a820634f8f03f2463b4aaef945e626a. 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/SEBKA9322090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2570acfb38146b4d8ba6f54cec7312c7ca5f8d2d0f8a0f0766f6bd6bdf9cb40b. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:38:20Z), 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/SEUV71500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad86332a267ff3c4eaff78a78bc61c1d81332c31dcd08cbfd069338844a3e71c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/SEBKA9522200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baa29316e45601c0f9408cf37219c938eb8505ac639ad49003762046460304c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SEBKA0014013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a0941788249893ec3c0b8aeaca03e63f5a590c1b4faf6af5a946c788d5b626. 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/SEBKA0014023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86408eb152826d2ddd90cb05e4e5c8e6a22ef1aed0bdf83ec9a1d5f9457c2209. 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/SEBFT9322010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111defd14e3ad95809bdd7cfa7f050c0d9a294de1ab965c70e1662274e3b96b5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:02:08Z), 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/SEBKA9322040.