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 0x17c2f9477ecc54335b0d47b99460e9a8f2ec886d3cbcdcf805896e43b1c69c10. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed23b6b8-5d3e-4114-916b-f2f1d7fd3292.json and https://artists.proofprofile.net/proofs/artist/ed23b6b8-5d3e-4114-916b-f2f1d7fd3292.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 0x7f99c99251f9fd7596aa37aa281fa38843762d2d4bf8d24035a5e4ba6e1b0116. 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/GBMA21818291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73ae3dc8fdc26df246afa9325637b48dfffd12d7410e71418e4cc2a7e86d788. 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/GBMA21818292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d225c0c35814f9131da9320c23eec750fdac51a4ff5952adde3cbad185f577. 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/GBMA21887421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd59ac35c7d4da034aa63fa38f628a45afb4b9994bbe09e19b89f91827dbe0e8. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GBMA21887428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1d19d72a19930e5f0bdd1f9cb2dbf176dce3758eca4a831ca34183033e96a0. 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/UKXN22407879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b66b96ce8372a7a37de02f634fe531b9959ad5cd95ffc195f7b21a55470d93. 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/UKXN22429602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dd338dcdec64ac8165a7e90dd03071fc8d7bdd4fa5fb9bf1530230b5a1e4dc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/UKXN22429604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6ba9af9d34edf4b7e1ac830687e05efa86621380904aa502e9508ce73f3791. 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/UKXN22429612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b09d17c6dc8c233910d522dce8d7e564430e35c7026de05acdaa2291230709. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GBMA22401616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb148f2b37aa8ef1584dd987eecbd61cabba36e3aca6a0b3a4576252ee4c95ae9. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/UKXN22595755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13273d8b16ad9370fb726dac166c65a6538cdfb19d7649240412133d4fbda9b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/UKXN22595756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbb069decea872778734836c1a2397957c718dd47537b5c3c9eb1cd0ed7c26f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GX53U2582663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e657a24ddc1a5f7192f2bbd3bf330c15c6c76234e387b4db15ac583ffda2d3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GX53U2582664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd037af63f65b982e9be961815dd6c8e7d321a2732ae0d85e9045856fccfc28. 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/GX53U2582665.