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 0xd0c59659a3da2fdbf2b96d8bed717588e383709b11d3547d4a0fe244954dde82. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/622486bb-aafc-4661-b36a-4d14f3a6115e.json and https://artists.proofprofile.net/proofs/artist/622486bb-aafc-4661-b36a-4d14f3a6115e.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 0xc8f55fa6b8738c44493ba8d2392736b129222a15898d6f5a3dab6d5a8ff64ad5. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNWV2412407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883d42394952d53f6e028a326c33d2603065a95e8c5395ef080cd60823281203. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ62563258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fb2536d3f1adc83c69da87ce21d4755e342de09b45bdf6c409640590af7d07. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZES62557828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb2d75d7ac99a8ea146cb17536c348e826262c20f02b8a818a9377d3b5bfb54. 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/QZNWQ2534874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f296713de597d15e3dce358fb015f0c5a20213191b96eb4ce65fd819dfc502. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZNWQ2534875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbef1df066347fbad5b98cea1a7cb9761a3dcab80f898228a3c7379a5a6a85f9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZMEN2578957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e9ec843171222c60942bf2ca16803f6fe79aead3efce10013ce32be851d61f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNWQ2534876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883d42394952d53f6e028a326c33d2603065a95e8c5395ef080cd60823281203. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFZ62563258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f854cd5872e3c008da10c79363d1bec7c94868ec17e24d6d6c167d3b0a195b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWQ2534877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0a7a7d3a92833f1695a9d9d016cd6c5fc6398be7ce7bba1e3178f5a12aeedf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFP2534488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc0a561aa2c40eb05085a53a789dac1824037f35a7a1a21ad4cae0e2b49c7e1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFP2534489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24147e472287ad25108f053d6c5ada972687cbac7ee3da15b658ebbdbaf6210. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFP2534490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10900e0e966bd5bf6165d00bd75cdcd071efad57d187d3cc8b585da593764e47. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFP2534491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35667fc7bf480de00d1edc95de1ba35ee6997e3f6a187fc7b54eaeffc78f6146. 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/QZWFP2534492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67fd4a6ced7d871ddd71e67c6d0ca127be2f60a19786d9c6fcc61e786d65e59. 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/QZWFP2534493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d58cae040ab90ea373b7436ffe33f456e9f269c0cecef6c891735d22a34817. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB82599664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a2527241a189034abffc37bdaa6e88e50ce04b5a13a7ecc79de3b37efc74cb. 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/QZWFP2534494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd456625e8f618c7f3a21291c995eaba852c448d39bb61e75e3beb3270d94feb4. 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/QZWFP2534495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976768a92d5cc8d1e529a1032d42accb1323dec8a083a89cf9a447e53ebebf48. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFP2534496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1a0f79557c9b6fd3c6d70570466312b444ef2600566278a3d103ae320766ee. 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/QZWFP2534497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8207ef5450b49f67b36ac19b168c59f5d62808487560c53f7dc847fe77b660. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFP2534498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0787b68288324365d59d1cd30cf763a892733a26f52522185fcbb5e8376a797. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZWFP2534499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6d2ad53e45eb6330764b288c8110f0b688f09ca584756badf6e1f58e97e384. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFP2534500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74c04e0607e9b707a475fd122e4fc5f5a619dd9fea6e9448a02352aedb4e151. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZWFP2534501.