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 0xaf17c218330e5c3ef60de9cef70cf6d87b47b0d98549003da988bab421a899f5. 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/b4c59382-c37d-40e3-8a43-4b7af2d426bc.json and https://artists.proofprofile.net/proofs/artist/b4c59382-c37d-40e3-8a43-4b7af2d426bc.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 0xa23ace0c9016221ebc0cbb0a1ccc7c56b088b990be06ab648cb2f2c9d8c90110. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB32377893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb62cd11007e286ad87adecfa6025481fead7d48cffc506770416b761f2851b4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB32382193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999081d9da4cc0c0865bafbdf3213ee33d2223d919bd9be2cb0fe5e88413d266. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:45:51Z), 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/QZTB32377889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195b16e3ff58fdbfa4907a1938ad2de710afd9b4ebeffdd039cbf1d9fa83849f. 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/QZTB32355335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc093f8221682d1c563be71996a1cc40a9eaec0cae57bc13eb520a37077bff97f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTB32355337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c6de2b4d8164e2e20f60195b0a1184aff0d0d36d511876568714fdc8b84592. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB32355340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061dc834d53aabeaff72939bd892c29c446763a941f54b836a062a034bfd8e8d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTB32355345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf07d073591b7e11f3e0537067c7562f79f8854738b7e8580659cd85193b8c24. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZWFK2342758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dd94ed514c7e27b49ded9c1602a2af51cff273abae7ae5aba02c955f56766d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWFJ2371158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ae0d1f77bf7e19c55a2e732562aeff63d9e36c3038962042be27dda70a05eb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:49:03Z), 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/USLD91759576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56f68ba6c34d53b5949395880de4379e76a42f45a1d104826d1416e52af8423. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USLD91759577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa2d19be145a6ec05b8fa30ebd7f65c8d8c2170d096ffab3a6d0e2ed97594e5. 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/USLD91759578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000267184773aa7d2b0b1bfd357340c332dc0f04150758f03263904aaed7c744. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USLD91759579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cf8856212dd5279437757ad0c56e1bedc359390ab5cd2aba0443b0d368591c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USLD91759580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0070f7040bc4b86d8b627569b53037b8233eda3340db583ae8a40002b803124. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USLD91759583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5239f723f66206164aa91f23e0a12cdb216d13eea3c742ee5a0e15efe76a6460. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USLD91766043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2809f86102d73b6ef963900029ca1581df2f12253a4f9c96892cc5500ae46f4. 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/USLD91778622.