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 0xd09047d3bb2f0a7d6184273c74bc49afe2bb2c54fba44602449e6543f0b2a8b7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cc0df16-bcd6-4dd9-81c0-e4daf282e154.json and https://artists.proofprofile.net/proofs/artist/3cc0df16-bcd6-4dd9-81c0-e4daf282e154.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 0x34927e3c620a229dc90044c549228f83e962a9a05f4aa44336f8d779b3fbca0a. 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/QZES61835764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4025828e760f12f5ab6598f550ee274555cb3d6df9f5feff967f7bc0a8389391. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:57Z), 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/QZES61835765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dde1bf472b721bf7c4f29f49ddb195c0d31578bebcec14e88dd75d8a6bd6812. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZES61835766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8359318f70da72f50f40b17744dd1abf4abeee30800ebbc368539dabf53e23f. 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/QZES61835767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb954a38ca928ad2ae83cff2f8774a7a0b583830e018d02d9773bb9829c9c582. 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/QZES61835769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095bf6e5d9e28b9f612e89a056a59b15a8cbf963429f0de38aa7031b87a93529. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA72258746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745e0b56034df64d7b2fe624a6376507d7b101c3f025b4628545430484cec12b. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZES82200321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3887c9cfa25ab9c2d64fe3525f3de495e91e57d0cf61b184b738a6a00387e2. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:19:08Z), 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/QZNWW2442393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394c25d265e28e4f66a4f9265ec18d8131131e81d569d8dfaf65d9099f898226. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:34:16Z), 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/QZNWW2442394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05813c6f659e2a9b40abcfcc219ce56f4bd31613ce91361187321b8f6bf10215. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZNWW2442395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c582e6da26035c6c4f610710bb3ed865f2dee31a0e9c9ddf9f0871e211abdf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWW2442396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c167515850cb649b5af970bcad841cab8adcee289e7ac4856692e3206567c6b. 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/QZNWW2442397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da42d2d041161dbc64487ef3d74202641b7b84ca5279242838d3f7fe83b4dd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:05:06Z), 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/QZNWW2442398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1095947afa7020ef6b332ce38ff1c6f7b606eaee456cf18fd6f06ab01b6fb1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWW2442399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792651db21b208f19da938ff7e2b65685083773eb4c40735abd7b7e234155086. 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/QZNWW2442400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590c5fc76d88f8f905822d88f6d86fa004510312290317fd958efb8f26562561. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWW2442401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faa3d6bd32eccd2cc46261d78d59a418bfd6007f1d6a1c75b80110fe2f9bdc9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWW2442402.