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 0x6041e0afef372c72214efe1ad6a01e0ad6c51b5db111e07e62313091a0c71d35. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4c546e4-372b-4f91-986d-ebc9e591ef17.json and https://artists.proofprofile.net/proofs/artist/a4c546e4-372b-4f91-986d-ebc9e591ef17.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 0x6dd0cab69ddaddfc6e6b2c95f4c525c99ab1a1618edf05d6df07a0ca7d5cf393. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UKXN22573064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021cb8027123fa6226d44e0eb5cd20128745fc3f582e499ee54966111422dc80. 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/UKXN22573065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c99b85d7a86c2b312c5b975c0bd81a934d51f2079acb15c6c36055ee17c334. 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/UKXN22573066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806503acc7f45d655b97dde29cac2685e2dc63d0c57ce7d4b13fa64cdc5fe916. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:08:43Z), 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/UKXN22573067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69675cded52d05db3ed5b05037030a82d89e565daec3b562b2c6c939a1c90f88. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/UKXN22573068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6a7476f1c22bc7518677b034aa41d1ec1483283a618256d6aa00d7d329418a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:15Z), 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/UKXN22573069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e37b37c1657278f1430608d0617c5e25a220840de30642f9bb2a6a348e3fc2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:08:47Z), 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/UKXN22573070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9932f7817fdd4a94b1eef64ea22933f596b2c7385ced30f897617cb4977591. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/UKXN22573071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd6c6417a34866e4b3ce707d9cc0ea4edb30ea3775a8dd15a26b842314fbc31. 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/UKXN22573073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9871236b44d4c51c40277c9b5c0d152a10ac249001cc8796bf8582c9192404. 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/UKXN22573075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8620e0452973ce0e16701694e087eaeae90f2a9d634efeb0be58a98fab38e5e. 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/UKXN22573076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185ee7c2754eb93b902ba89c71e0620430d3c7aef3352ebeac57af466f49882b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:45:58Z), 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/UKXN22573077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d93f533ebb8b0b01e247ec7fc30acfc818a91c4bd283da5083483bcfdccdbc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:06:54Z), 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/UKXN22573078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46ce101143825196b4338e2c1e8991860a271254cfee4948d909bb6f04a5c67. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UKXN22573080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4403504929b989dd019e2022c74fec26db46bb097e9580025de8b28641c7466. 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/UKXN22573081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a31b985ec3e4755ce5838404dd295887f715110337cb85f84e859d90a31ed0. 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/UKXN22573082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e739b76d4775556fe6d1dae87e89907273be459e343368a1e1dab2d0af696c5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:54:54Z), 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/UKXN22573083.