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 0xa963867dabe75f8aba5872464a5c73a64148db70efbd595c5c3a1e8654d55353. 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/5ac368d0-d736-4e8a-af5a-6f12011fe4f1.json and https://artists.proofprofile.net/proofs/artist/5ac368d0-d736-4e8a-af5a-6f12011fe4f1.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 0x37200510af3b2d5bd752ebc7a3bab83a0e2dedf7ee8437b07b0b47582d3cf42e. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QM4TW2062928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05538dec6f85dc3f6061406f2c0ba0ac5cc088e37d34ae38849805862d45eba0. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QM4TW2062931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6513426283146bc8df5d0e9321b468a320806ddd4c6b79d0c9ec99b5e7b57587. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FR9W12502722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361ddaa1043f78725bcf7a2de968a9520f308f4cd233f1eb2450bd35fb914881. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9W12502723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3ef8730e94518a43d8bf25007144318038418ec61b7ea534629f8c36ea53ea. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR9W12502724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67595f0f0b1d9f573a1988bb86449359e392a9919341c3551898c1d6dd90f965. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FR9W12502727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a71bbd6bf2b74f30b004562150551698bd2083f20ca785b012d8541ce006e82. 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/FR9W12502728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c439b79f8e3f797d260c8a54da84ff76bb279ce739a07ede0945f830e40009. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FR9W12502729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3d8ce73ce58a13667083cc0eb543c7094ed0eb69d8109338543d9a44a02cfa. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QMDA62557262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523812ead635a750c7a59bf378206296926f6481e45b2d498cfaa1e466108158. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMDA62557263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe59163b9c336ef86e480feb9f1ca715778c5ad67812e484aa23b2f977f89795. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/QMDA62557264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a871a0e76624447db6a7459ed7708d74b035d147cb3415530c9f347ac72ca4. 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/QMDA62557265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153485a05f1e6d1101958501f792cc7bea1e15c3cf05cb908eb67bb30c2c94e6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMDA62557266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd589cc8f88c5261b7aa3ca6cc06174fca9f1d8b7d9c76e0e264513e7e96ea9. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QMDA62557267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32f7feaf3662598bdf4208a38dde69b3da0ac51314589f9ccf51f35205008dd. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMDA62557269.