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 0x147cfc6400e3d9ded472c129d8ba56c9f273b05e8ac607531836f03c79fb6d25. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b034f186-164f-4f5e-a5be-5922c8d1401f.json and https://artists.proofprofile.net/proofs/artist/b034f186-164f-4f5e-a5be-5922c8d1401f.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 0x5833c76c7c1bcd694c1aa32f49cf3845ece4fbb13972555f723f3ed0b99a4d63. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ5FN2091559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a573b93521234ef126592f49a7e1e23e584b1f729b05ffb758637c451aa5246. 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/QZZ8A2422819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651fe71611a2627ba920fde4f53d31ed5d0dac2e78e9cf37c4631cf307aadb4b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:52:44Z), 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/GBKQU2506402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97696907bea698c085fa63a6b9522971804233b6b79079f2541c0a5a8fd3ff5e. 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/GBLV62414187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4932875a7e02785f2686c2aa855cff59ec797a049cd6c2dcbb1733994027b6d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:16Z), 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/GBKQU2540068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569fd806867e9110dd263ac2c9b8585266fc35b38528c91616cb617015fde9f4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2153000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9465aff8ebe94adfb425cc2526437079c1e41eff3cb09ec529126f655b0005. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBWUL2018078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569fd806867e9110dd263ac2c9b8585266fc35b38528c91616cb617015fde9f4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2153000.