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 0x8fdab527162339c012d95a97a40b7f28068ac9f163d8a55f4cf3004e0b2a61f5. 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/a2ee7a82-2f7e-41f8-a25a-ee00890971d0.json and https://artists.proofprofile.net/proofs/artist/a2ee7a82-2f7e-41f8-a25a-ee00890971d0.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 0x90ca56cf6ff91a396be7723cc575db535dc990a8e61645ee9931f64266e26fec. 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/DELJ81905550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2484de01bb0fd248e60d13539c68ef968be76d0b2a55d942a11ea21e520c25. 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/DELJ81905551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcd3d9ca275a4cfdaae8719ef8a15fe73aac260270d5497c4ff207a64fb4b8a. 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/DELJ81905552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c898b9ffcc672b03b5853464fa3046213ba75b0446804912629da0b39b57a46. 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/DELJ81905553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc683cd9622ca8e3781a4cc0c3d8cd108899a81ead009a9481878f751f51d681f. 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/DELJ81905554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dc7e13585a732279e60cc06e7687c615282ab236f908e8e2466eaf07667794. 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/DELJ81905555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06a85ce7044ee0b6727255b2061b949190e0b24195deb815adff99a6e8a31cc. 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/DELJ81905556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabf3f8406692d5952710812b88b28a9c084c175c8fda06c44b46a556b25bfe8. 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/DELJ81905557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e208355a045d8a5c75ee9462aa74f185365603a537ba64da144a56ba36b765. 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/DELJ81905558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964bd28bbd3391e2420c31ad6150301e74a53bb5744a234a325c8288128b0d33. 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/DELJ81905559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e1e7aa808844bd2e08806dde3508199164e17fb32994c999b70bba43c3403d. 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/DELJ81905560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640a3d4154678de9fd88e5fde0a7d506243594ebf51bdbed8cc3b54f7f9c3021. 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/DELJ81905561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85271a71c6966a65acbb3de66f48312a5372f920d104539832da6361805de1ce. 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/DELJ81905562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd0f31f3c5e814f16e394439c03a2809348416cc1f631f6a2c2544adabe240. 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/DELJ81905563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf5f642f79e93923a1e6dd0eba47a63cdf0eed8e76608166facdcbcc67f31dc. 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/DELJ81905564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f4d172c58f77f1b56555f87333585678e3ed822f81184a82506613105c2549. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DELJ81905565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0017bf2f66dd800be645411c4ddd5f530621ee42bac98d1a822b1aca2baef0d8. 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/DELJ81905566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebab279f199776b3413cafa0374227a34aa9ceb7e3e744cc4aff96e50baf5f1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:29Z), 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/DELJ81905567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58877ebfc040f3ac652609a82fa13265dad34d4d3e04b875b8c6d8eabbe214b. 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/DELJ81905568.