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 0x8a084d8b6c11278bb6717ec7dc674bf86cb7c18fbf98264c87e87df0631cae9f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/749a4f47-236a-4b89-9904-f258fa008f5b.json and https://artists.proofprofile.net/proofs/artist/749a4f47-236a-4b89-9904-f258fa008f5b.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 0x9d7968a988bb77f258a02501ea0549f89d9dafa236fea1b5309c7112b6ae572e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2252000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3097c18ca55f380b866dd4bf086ab8bdf82a79bcd5a23175c0d6dba21178cba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2261574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff225c941b92ae9fb0478a82f7e89bca793d84cc9f7ef3af84832c18d19d8976. 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/GBKQU2277718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80dc70192435a62935eaa0ea4f71f309320cf598fd3e8a2345950366d2d6861. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2272544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767ddd50c771cbb34ce78d588e5e368ae6974481982ecce537d9367d58d089c8. 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/GBKQU2277719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce251100ef776936bd277be2fed5d75383ba3255be8c3a784f7412bc705929ec. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2277721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3672ab9ee58f2d03198a098e700477e88ba452cc78f203b3c2351887e8f16f3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2277725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe1ede4e3a5b7098313c8785dbdeffa91fc31a1173b9b0271f90bea0d6c0197. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2277726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f0032fa671e2bb664bf00cb0826751544ea020b7c27e7ae09ce1ab3b7cd365. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKQU2277720.
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 0xe153e3194541d826ae3763b39f2798f06c5432e1d9cb377ba1fcbb3b7244a32b. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/GBKQU2277722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0505d1f134ecb2ecab3c71598e26484c13288617ebe58ec414054fdf6ab7aa82. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBKQU2277724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bdc7338d2bcf0001f4d82e0a9730c0c9467449f145c9cf34f05855557304c3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2394659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f7b97ec8f475f0054eedb12b23637b8a7313e9af4a753297d8ffd0db62c333. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAY2346274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a82164585c486be741b75d99af9914bf23f6be51c8c1a96f66ecd86d63fb29. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTAY2346273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ef71b2101e27470418da0bb96c292a5e08e413e87745ab62e662e6407dc7f2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2351352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4419a0e3d1a3689fc48f50f223affe8504cf592d545f43e361d6aac5dc407ec9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBKQU2351353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c03afa62bd9401a1986172cc334b37288705341e51253f4be3596f282e8af4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2329349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c81e6f7a16a431a14576f26ebe262411aa5f1add7ba2da31b618926a97d697. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU2329348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04603d56c7134e714a86c10022397193f714656e5add54fc04a5b6cbf520b97. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2327545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b009fd3b1ffa2bd9cf73f9ddfb92c471d12094b91a5872a498509a08086498. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2300982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b5c7377c6cc365165302da8719ece63198398408793ab7cee4b606f5460c82. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBKQU2300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071f353ad1b8cf67f0b8b1db1f4935d4061df0f0148605bb38d5e16bd4428aae. 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/GBLV62211784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419cc8977d3b58a97c8f990ec9e77dea5e30559869e497645ccf27023db7fbd9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2299514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d31a556787894bd8625b8848d005191999b717acdcd636a141af2ad9b1454f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2296169.