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 0xaeda19e3f9b706267255ac10ab38ba64c57e9258e2f8238124b7e72435762227. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e67f14ca-42cc-4099-8496-afff59afeaf0.json and https://artists.proofprofile.net/proofs/artist/e67f14ca-42cc-4099-8496-afff59afeaf0.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 0xc44875c8ef3718b6fb7a18674fd04cf26b97e3b6946e96b9882c4211dd6c0c3c. 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/VED049600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd078da545f1d4e2e59bb6a76efe76c1859d6f5cd3802cde5dc4f2e87bd880df6. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/VED049800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc663ab74e31ba13cdba8d52f8dfd7543534740d2707675c09370d779918dc581. 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/VED049800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799f00a9c0df6e8eed5f0c26718db5ad79f58cd467f215d0974a159fb51eaa56. 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/VED049800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ed77c9af9c6436c2f6ec934b0cef0f61c3aeb4e1971ab19d63a513f2e69ef1. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/VED049800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f55af8133b80069b987d13b825210b93bf8912eec29af2497e5816810b00adb. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/VED049800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b09a40127be517ae25f15f03997dfdcbf9464ad95b426a37104fda8483b9e8c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VED049800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c7275e6e6a3660a2bb6022076e203fb2b95f5900a1a3e16a9ed27dfdad96fa. 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/VED049800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03a24b1349393f3d09f9134972d5d63aa75815d4b5bfe02067d9b4c6d3a9c5. 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/VED049800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a92033ba03af4678d4dc147f5c56c160c31df168c606e24f39a8e3b115a877. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/VED049800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb43708e152e0fa90dbeb16d44ee4ff3c67f825ea76fe0ec1e9cd5f05827a63. 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/VED040000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bac4f78f34fc5a7eb2c76b85a07475765576e99aec248e57df94275b2f87bf. 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/VED040000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe1da7c21e815a7dd7497c559f1d5facb59b52a33a418243ce48ee36eb0ea2d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VED040000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6749979fb7d27ec5dc3d68c287303de3a4dabe23bd9127b227f2f63750713d10. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/VED040000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771f9b334b24173b0ba9ed6505acedea0f08a5c398e96ecdc21dffa8c9454214. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGH1455515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8bcdb835599ff380b7d7da9e9e9266ead6af98ef2fdd1f14020547efd63e78. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/USCGH1461712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c9991e91498d6ece5461dee14c77dbed2481ffd127be9ae6487150994d7d34. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USCGH1461714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1484d8c6d9780f502e981e76923fe250ad8f03047a798c89286bfcbd78f2db98. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/USDY41757772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f3fc36238f2b439d83714f5217aae118952fe588c4fe4c75a6c65e5ac4879f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY41757771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804106d323f2d655858db570ff20158fc016dfc515122a85fe0ac0619adebf51. 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/USHM22255463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bdb9b8227bd3ceceef49ca3e34985018fcc181b23dc0b16c96f464239d80b2. 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/USDY41757782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ef13cf59fd4a0b20426cd6adf4cd7c8563c598c84a27a4919ac8028cd58eaa. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QM4TW2559335.