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 0xa0a49cf19c81c78170e772eacafc96394a031665ab8dfac7461a7bad4d0baf9f. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30a69540-46b0-48be-aac0-f256b615abe7.json and https://artists.proofprofile.net/proofs/artist/30a69540-46b0-48be-aac0-f256b615abe7.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 0x6e0c9557f5fa497b9ec84121b642eb6aad9f6efc894c231f4b4cd21466717684. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/ITQD01507701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67fca990bd0ce98b55ecd52d3fea6120636f9ed02e6f28b7aa2d5c3f2b5aa31. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/ITQD01507712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465f138456caef817b909537213f6c9fe1b649c10f27483aee21fd0b6eb55b58. 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/ITQD01507714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf41701c81460e6ddddf66fa82cc7beb159ed48b4836f7f443c111311da4976. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBMA21881804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0716fc35d8010c423c19b8e8d2ca3463b6f57c5b7396ca9a287dd3b056da8d42. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFZ52029919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcf467c66ce23db570ecb85ec39ccd6bf658fefc3ed24ee0358a7d70464124e. 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/QZK6G2021545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d6f1777937ad8269a9115866a888fbb6eec1ea4d5e6d60f9492cc66b89210f. 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/QZHN92451920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18125b9cfb5388f698d43e927d6c8ab8cb8a2eacd2cc6d4be411439428cdf796. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZZ7W2403420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9825a371139e7d6862da04132d667c7e305e99e36eb8e264048a70760e23482a. 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/ITMF12500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c5bf076e189f9ac52721494e5da178526130885ee624c045878468af27659f. 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/ITMF12500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371d2589d89796807cd1f0abdfd224211f9d21dc4014917841c6acb71b5a8bad. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ITMF12500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e035145024f16bf7df55a8bf3b6865f3bec07077e83fafee2a15ed8ca1ef87. 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/ITMF12500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3274e87481e8ab7a520ecb10bdd734f3932a5b5ced0eff15cc2b3d30297f2e17. 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/ITMF12500208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0963f2a7ab429091d87c60db86806f68cf851cd549c0e2ffdf463961446256. 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/ITMF12500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b9febca5560b6b75ca629271b983b77bc7c65bf3029e9aacd673a171be15ff. 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/ITMF12500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8469ba3414a924a32470fbf43d8465a860aacc9cec1b90ff69de8facb741f95. 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/ITMF12500211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34916fa682a40d95b3fd62e0a34c8bdd538fcb94e90dca90c603168156e45a65. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ITMF12500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0bfc524d3a34ca1f3081cf376a6ddbc7cebfebe27e0ee065cbd2f6dfdfde29. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/ITMF12500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b017bf341fc8918dd5e9f3a2c9da75097ccbe1d468a0226b6b2d7d193af6c32. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/ITMF12500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c3ba24688f3418ce7372d16c5764eff7509e6a13921fa09dc4624105a891e6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR6V82476953.