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 0xc7cd3c4581589c298451abfed9a3b9a56e494dd2d5979af7d53b3c2a15cd02f8. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53e3f580-676d-47fc-abb1-a4ca23f5c032.json and https://artists.proofprofile.net/proofs/artist/53e3f580-676d-47fc-abb1-a4ca23f5c032.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 0xb425d6f76a08d68d7c25197262faac074d36be41b9ef5c15c3cc947d3f9b7e2e. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/JPE871803158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e25302e42abc151115894f619e3c87a91f2789e218d86b8abe4844a7edea87b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/JPE871903633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa576714fe952fde88473f8f8bc9bd7491956593331c8a8af251272d53b39252f. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/JPE871904052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a0664dbc3facba6526ccb54ed2dbab724366eb0ee01edea60f0f952aa7f171. 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/JPE872204615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763aafc37a9ae17aaaf6bb0184db0ef54c31c10c8b69ffa4b9caadd09abb8ca9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:26:42Z), 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/JPE872204620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0bdee895f564537a6d8b642aeed4660ab055038f8271cc265e46a6bdeca50c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPE872304685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc028f853b2f32d93729359b374960540f569bcc9c01d7e38fb45325edae054e7. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/JPE872304686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553389a3967f18631708fc1aa0a1ad35cfbd92e9bbfa748d116f1615b3dd4633. 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/JPE872304968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7181c16ad85f982cb670a4fd5f8467bd6f5403ba33ed42e4b3af47b403618fe5. 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/TCJPC2475245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5feaa47f7d4d94af37c4c1df749f21a3929135e87487d829b70c7f472b5560a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPC2475259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b26d1e5ddca3f14fdb6b95fc3ed658272c76dfafff66fc967a39268b31bdaeb. 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/JPS752500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5b57cc6c5d26b663eb8130b77dcf7f0fe559b3078491658788d93d65e057ba. 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/JPS752500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a632f8bbfa871c8e29ce6a8b7c9a362c48167650f84a0bf3c0798cb855d641. 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/JPS752500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e9b19886ceb6d25db30d6d6b1ca8fc0f46d30a77fd9e8fca0f496ef5553b4f. 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/JPS752500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2d4426b7f718ec7ce8ba83c1f0d0cac036acad5dfda3f6a3107b8793412b97. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPS752500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec9be2b7df7eb5825f5d5d5eb691c32dd222aca1fe514d545d2158c562b5c86. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/JPS752500452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7115e77316b8635696682b802e4675d21212deb5b0df83f0de6fe4ebba5e6426. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:46:02Z), 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/JPS752500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bb14d8a848663440bfa87856758c055f89ee4fc5f612889aa92d3f7291e119. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPS752500454.