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 0x8758cf8f2f01692e27865e268487969103a6345cc81578225b3e2569732dc833. 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/2422e00b-b89a-455f-b1ac-c56506e4b7fc.json and https://artists.proofprofile.net/proofs/artist/2422e00b-b89a-455f-b1ac-c56506e4b7fc.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 0x2bdcb66cc57ffc4efd565cf8b4d79f9e33227744d5f32487ee6e01c4693e266b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBQT21300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28453250717ae9905d0345a497091efc0591e1a609ca1f8988929089ce9045ab. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBQT21400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff62a84a1c1682f62f93efa54d4c122c6d6ef6b4f02a435f6e6718db784ffb9. 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/GBQT21400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3509468486941a324190d8c12cb2fc67b0180e0460df71737db0f6574ae0bc13. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:38:29Z), 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/GBQT21400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f199c3385d272dcc47e775ffdcd9d629869f01049208549669bc43ec09a76c2. 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/GBQT21400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24edf83cfb3a0526235688091b3e5b646bf4b1202a72fb0c41b5dcbfb1ee536f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBQT21400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfa8cad4bcd0ee91afb98839b0dcd5011a3cb0717797ecfa6b8bf16a30ccbe2. 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/GBQT21500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacdc5c14cc97478f817852962aa8477e8bb7a8b89a1c70a5bd9cb41d3542680. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBQT21500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63c95a40fb2214aa0cf8aa6b0afb53cc43562b4ff23265db123aa9000c3c5ce. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:26:31Z), 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/GBQT21500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319fd91f7c4c6a633b1c8bf090dc056cb6302ab70f1922885a484ad046b7b63b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GBQT21500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277da8441123c91cacf90025a553fef4ca92d159c4aa6961619adf03448a43ce. 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/GBQT21500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffcf254e502f51089b3f57d027ee4453a22a9e466f2c4cfb66d7eda5bd92438. 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/SE5XO2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5776e75e19396b0a5af8d63c14626d64bae22694756cef86f6f4330f5ba458a5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SE4VM2400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cafc4496659f6c6b01dd26311ad6a8fa5f06887861a8d3139b90821bf50511. 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/SE4VM2500903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb69ff4aff678887dd7c0bb643b0cbc9efb255f8821167cebf8e21edfa44206. 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/SE4VM2500904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd996bb4429ba510c9b14d8bd2609b75baeff7034985390e1be6fda36b2afdf. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/SE4VM2500905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea57453615e6231291d291bed8d9461923dc466482012cf6f00d95881ab2d63. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/SE4VM2500906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb180f991735f2767937ea602c719e6c3f5045edbaf18d0381f4878b8cb93cf61. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SE4VM2500907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1495cf2cbd368d2ad33ac704c7e418f7012b34e41756074f7dbda7c642d873. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SE4VM2500908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bab4e97dfab6e99a0860b96e617c766e3a65fc579e0c45987ee70b25efca08. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/SE4VM2500910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c700e8bf76ae7e1b80cc60732c0c64ea570cf860f618ef9e0d8532efda8b2a4. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/SE4VM2500913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caa81c280cc8fe5bb137cf7bc6da74cfc002771141583551ccb411dd15a3d02. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SE4VM2500915.