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 0xbc0e386c234a397a5e7174e430677f366ca4a708bc27a91a5d831ef93f0ab3b1. 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/bf211cc8-edf7-4d1c-a5a6-02c617143927.json and https://artists.proofprofile.net/proofs/artist/bf211cc8-edf7-4d1c-a5a6-02c617143927.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 0x8c3a1a63ef5e47d3ff2514b4526ad033b71e7b1e25d14f9c23e989af128e71a8. 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/QM7281566116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dd7f949eeebb4c717d6bb1874bb4c6f01e1dd6218c3c63bff61be0bacbaf18. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/LVC100500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4587fe5ea16c56c8e550eb880aeac9b31013c1b8f4b33fffc657027f5a793d. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/LVC100500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7ebb4b29703c7e256ae2d0290c22cdd8674458b209e8fde0ebcbd4adfb43fa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/LVC100500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc83424d9cad851d3f90e29c6888e42c1d7c663dc83f904b2d64904f1e1b9ce. 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/LVC100500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f5928b2fbb89a481213cf13f06cf38b6f91414052cf0573cf96c2996e30c2a. 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/LVC100500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e2eec2869625fb2798336bf737f0d9500dadda837d50acff01be78f7c7ddcc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USV351490132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ca22ae53daf5344565827bd45abcb0bb2646180ddcad553640a3dafc99a9ca. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVA101300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea301bc8e5dd278b3d0a9159ac9f4500f5d0b5bb21e0e583f91fd410ea013c2. 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/LVA101300729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d929ec9aa6a47477432b39f4e2f4657427ad3fa40b5a1dd913de54ca9f91361. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVA101300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aeddb4bbb84757b1eb5cdc8376262a46bebecf0dbde60f39cf39fbdb3cb525. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QMFMF1500941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e711f447ed116e7a2ca4531443d2f04ac8ebbdd2098b58c1fde1b9f55e5816. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/LVC100500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6457390031ad4ce48016a7ca92180b6e72ac2e48951ddc4e3b61167ccaba4075. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/LVA100100261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43aca981701682dd84c8450ab533218f7f5f9f52991530fb4b29777b4a8aba5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMFMG1318137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5360dae0db991f89bc13a0d9d9fa4e9c9f3b9ea7024fd81e6f40b09e5a95380. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFMG1318140.