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 0x6f81f7010013de068ae6ccb8359a6717d2ff7dd2db527567401c1d75372767e7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93afc702-6424-4b58-9be2-269dc69e2650.json and https://artists.proofprofile.net/proofs/artist/93afc702-6424-4b58-9be2-269dc69e2650.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 0x25fab30370fe1f6d2151ffe7e88377696c8d2ec23b24801bd5e56a76223862fe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GXBDS2394644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1a63d1b7b1d17b251e124228a62a0bd5eb3d37307892d60bc5e2a8cb7e30aa. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GXBDS2385796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea2eff15cd795439c1ba4e9c731d16ab4fb69f0a409edc509481f233f2633bf. 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/QZTVM2300685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394baaefbe2952989f0954e599dab861e1fb7398e9b492857dd935c9e9c80738. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTVM2300687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d3a1ab97a18a07217bfd584ffe488266ce36b98c724d629cb21f8c3de7ae21. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:22:24Z), 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/QZTVM2300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f25f7bdd02455e282fe72f4638fe11a9f4b9746e5cfc8b74746e18ae0a59196. 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/QZTVM2300689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f8983494856b393255a0698194b1428c1d0ddc464a56be97b779ffa411dd3f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTVM2300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb71a7d483611c746c1ea699880aa3b0742ef4465d68053de5ea4ca7fc9c4bc0. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTVM2300693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3748564e5bb8213ae44c22efe6b075ce14e5425420b44138f07df90e6f1f6950. 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/QZMTV2300694.