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 0x1f8ba4523cd36275d21100e6950363ef6df85ee693032455c9b59276b8ccc3da. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56034e1e-6629-4db4-b321-60d5203f5ed1.json and https://artists.proofprofile.net/proofs/artist/56034e1e-6629-4db4-b321-60d5203f5ed1.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 0x4fd5ceab4ede6a77c3c8fa2e6318311ba01574f7e4be19851b4952acc70da92a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXHG92540072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe685fb62e15f08a07b86ac13266886be923bcca9db831fb41db92181a8f197f0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GXHG92540073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8370fdcfde1c924122d4fcdcb26260f0c59932b8c557ab1dd4124c71bbd48698. 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/GXHG92540074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fdc6678d3fe92d326160caa6cd285ce2a78d791ea23d9bb456372d1833a12c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GXHG92540075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9de3d320fcf703135dfa1b6faf69a6fbf63fcaf4ec63f6348ea42722d88422. 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/GXHG92540076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1775f8d0b076b835adbff4869b4fc63e69cf4d1f9b4f89a1466b25ebd1e5079e. 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/GXHG92540077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd310d9a38b5b35ce5e59a21e33b6badc026ebe31e0a2d1c280926f6b7b888d7. 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/GXHG92540078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86ccd4f1b4768f30b5e7f9bdcec7b9727a78af04e4efe5b23ac5a0039a4e226. 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/GXHG92540079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb42d374aa984d3126659e2a83e5b502a2442928e1a8633d06b545e0f591f4bc. 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/GXHG92540080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3418140000c6c165faf3d42617f05ea5b05692192083bf93fa1c0f25696421. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXHG92540081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76a9c170465d45c7a4645f76e804a342aa2853bf79668315c66ecb71aeebc29. 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/GXHG92540082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45839896d4e704aebb2b854fed83b0a2a9db7786bf5cd02762caded0ebcc84c. 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/GXHG92540083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82abeb069179a02ad383f2c07529a469108c0589a4cc4335e012c2a2da71c8d3. 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/GXHG92540084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6068f5db441210ed6ee77c45387ff9e2f984d79e62079cd39801992b8ccea0dd. 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/GXHG92540085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cab96c46e66b247a501587057616c12ac3cdab473e722dc7075bf0f47013d5. 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/GXHG92540086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb4ed7f6a506543027fdffc59a07de881384c851a7dbf438a40210bffdde9df. 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/GXHG92540087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9ab707581a24517f1e51407af36a504ec5c99b967c91e129ed40e11c75eec7. 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/GXHG92540088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a57ca96fa203a9c136c7b842dfd3e86f241abd58060d2c4b053ba5ecfc7a87. 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/GXHG92540089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8e176752da5ea8a79171fcae139711f99e1f45f5693564c2d35c3d607bb748. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXHG92540090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312c987d53364e3f06819588e89f8b286ad053fde5374af0afc645c23c1c3606. 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/GXHG92540091.