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 0x9d49a32bc0db74a407a79cc8933c64ce2cad6701a3291d7f8aef0cefbdf901e9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/283434e6-67c5-4ccf-9ef1-4bf9edb823ef.json and https://artists.proofprofile.net/proofs/artist/283434e6-67c5-4ccf-9ef1-4bf9edb823ef.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 0xb7a2df00aba28656da6df73202b5f0a302d426abfc768a7200fa4c27a2cf8b64. 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/SE6I32456130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375efea9161eaba36820bcf72c8f03be4d7f9a3fe94aca288b3f28a18cd87e97. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/SE6QE2444506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969c70bff05002d04b08814a15f814892f5f4bf3804fd1dd98c6c6c7eecab7c4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:27:15Z), 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/SE6QE2484598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf570d2011cbc7e578cdc236d4e64f6348173c48ea66683f7f3c1b0782979fd9d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/IL6652409544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb6ea9d45a8848678043119dce943619711f2fec54f07086e6b00815eb50914. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE6SA2416024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e6bab75cf3af211e7eaed916c0ba80e72a755fbd3beaf211f5618451f4cca9. 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/IL6652409600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9a07b22bc6249b2389813c7df3ea403c369d3028c4a1d91a41e8158dfd1424. 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/SE6SA2486082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0e0d40501bbfd8c59dba0b082a3d5c1a8fa8c351986a296193d14a7b06799b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE6XY2502430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50a468db45158f8e83fcd3b97dcdea45e8e9c94daa084fe474528236688acbe. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QM6MZ2550040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba15154fa3c27b4909f9bee3c42699c95007b5ab27293a7e9cdf6f47922c144. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:42:17Z), 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/SE6XY2549037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9556d5c0fc5715869e230cdd059b3331a62cde8daa3127c5c20ac5ed5fbe5d. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/SE6XX2516076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd951ca75e56f89415e83d5d5cda7411d558dfc001bd8710872c7782b848a7c0b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:16:48Z), 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/SE6XX2538868.