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 0xc7ef9b5b890ca6576ef8fc222f7899f646c61f154932c601979b2c867c6751cd. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d526039-a37b-4f68-9cbe-0f06219607cd.json and https://artists.proofprofile.net/proofs/artist/5d526039-a37b-4f68-9cbe-0f06219607cd.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 0x7b1601700fb1a49a717dd2295b9d408c461a2a8fa104a1a2c235210e6edefe3a. 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/USATO1300427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bc3fee150ccfb544a09a15947323d63bfb4e9c9a654e152949345e5e17a7f7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USATO1300429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaa8f31968e2edd62679b9a518399dfee7b9e33530aa4b35a20a9d48a523802. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USATO1300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db0298ca96da4dd7c57dc6ea259fa47675763f024bc531ed614c3f0640455c7. 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/USATO1300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dde614d9376cff6104104a26d03506a993a5143a742c57e8621cae081e3519. 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/USATO1300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1236869ad98313feb92c9cdcaed68698b85c934f2ae3db6122cdf50920dca816. 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/USATO1300452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9243f883a39480eb01610ac1d6b21414be6fbfb9d401c933681623636acac8d3. 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/USATO1300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8c0f02865ce503bbdfaef526063b4e542b4fa6a8f2009da74c9b04c4c1b15a. 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/USATO1300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3091dd4175826d1e574275fd829a07e3e717231d3baecbd70f3f8fb056104fa5. 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/USATO1300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb611aa08fa5a2f32acf0cd26a40ff8bf22cbd6fa7e38aadfe3643bde1fb5f5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USATO1300426.
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 0x182d7e43500c3797236aa7a2ebc8ac3036691a1e23dc3bcd2f233f02f332fbef. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USATO1300428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e43ccf3a4ef71383149db149a99d70caf54ed511fc53805be9b8c721f02250c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USATO1300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330c0ad9042ad9be15780eb1aedde7d2c1e057f703a404c98ba38c14abef6a64. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USATO1300431.
Wasserman Bass Improvisation No. 1 - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566cd3a7b1b0065e0bdcd3370785c41fb3ad40d3403687d6828bf57edc056895. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USATO1300433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7eff9b0e7d6034ed358d9c595220a9bf549d2be6c4c297f3c0215b694e3686. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USATO1300449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed268d3c0cd89146ae6269553379e6cac775ddea595c9ace305f95300b6f864. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USATO1300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265af122a2cb38842c533c84e4e2d4333f25f5a72567322a773af6910a8c867f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USATO1300455.
Wasserman Bass Improvisation No. 2 - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84de3f0f4e26a18ad4f10cb827ae80eabbe85897941628e8b59b0478b6d4cc45. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USATO1300457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951cbab6e54d15e543e6f23406000f31726e9cc11e758a6e5c2f1c89ecb691df. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USATO1300458.