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 0x4cb9a8501117f7a4f2560e80c4976e1c985cc3c947ffe07f110a2a7032bbec15. 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/df1d1d6f-d861-4317-aab7-96f008bf9f7d.json and https://artists.proofprofile.net/proofs/artist/df1d1d6f-d861-4317-aab7-96f008bf9f7d.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 0xd9d8d9bec03b8edbb9cc7420675a0f41204c28b03ac41a205117578d4936e193. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRME52300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cba3ff7720fe7400595522c98490a63fb1fc3ea4227f0c1db2834cdb9fb28a0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BRME52300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c285b05c8dd76c2b6086443cc55ffec3797cae05d9d790f8854b1b2e55a2710. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/BRME52300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefdd6a36f4616c703d257a6287da30c176f764cf9d51827eb64f1b113656606. 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/BRME52300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9336937b0e9f825bf44591db0a7e7a02d61cb0e644ff276f1fecca4d7618a0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BRME52300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b3195e1ea169d721f957c52ccdc703d06f7bb3563401b1f945622d16ab3e10. 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/BRME52300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fc033da7da628672f8c32a84e170af1dca3206a181f7f344b0048cdb1942c8. 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/BRME52300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeede5faef54da64c29a9d75f7fd432c7e202dc41ef60ca90ed1ac1af1a54c91. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BRME52300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0e27d94b1f6f54d5abf02fe60b756c927d838d9f48c8362a9fa28c1bc9eb1a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/BRME52300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2ff3908723a4caa81324617df0d8f4896a0731dfe2ba02591637763756f4a5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRME52300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e49692b887fa1a9a9f8e9ea86580fdf24cf570157c98a6a3495259621432986. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRME52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf7b3b1c220d316e6c02423642a42b98f3fa2c95e491faeb0f4d55a5954a1b6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRME52300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd21f49be36e962463fe192f79037745a10fb84e3b1287e03dd0b1df1974af56. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRME52300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c7fde2e68cbc57ced59e613286600aad8b2344a3d1cfaa3045ea553af9bdc4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/BRME52300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1db135bca4e446f268e670d5615c32d2e17e0ff45876249c91bf9841469076. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/BRME52300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40baf1fc5fcde8cc0ef6f02b656824ee64ab486dbde4892a4bed54e1aae9c6c9. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/BRME52300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc548acd7555ca4ab3d9ce08bb74ffafafd0710d2819a76fe17998dd9ad4c38. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/BRME52300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893d0aeb91925ea42685fa16ac5639f1c5fd24b818566d9835ebe3ea7e384185. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/BRME52300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09626c15bda8adb509d3571ba5201815ff466fd68ff8af26bc520f6a13f1d1d7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/BRME52300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcb456d2f43b4ae79fbff995c6f045525432f7446ad9c86536bd862171491df. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/BRME52300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67098522739865894c0fa7b7b5c512887ba251c76f4187905f4af400fec150f5. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/BRME52300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c5e1d69f66973557e0cce15efbe422fef11aa0d5ad4dc716588df27062949a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/BRME52300021.