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 0x948ac45be59e01c59a930a4d56377ba5a91269b717cd16e4804e6f44aad97c2a. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85a382e9-3ec8-497c-b298-295a99bc8d12.json and https://artists.proofprofile.net/proofs/artist/85a382e9-3ec8-497c-b298-295a99bc8d12.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 0x05f5563602e9cba842c1a63237d1d77ca8ac0599a36b5b6fedb30016cd70ad98. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/ES71G2048599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115debc9abeb66e1b3d8f61379819b0f2f06915c5f4290571596909ed8a4e263. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ES71G2222328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9ebc4cb9cd6201f6514830b438b8944129905a95b34785e26eb94168d13880. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES71G2220407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4397ebda4405844b0da817c2cc828492af8ae274bab959b8f42be92b6cf9a14b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES71G2248009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ccf23cc5c02d457c64e07118a65b08fbb45bfcf94586e2f7cee124908ebc26. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ES71G2329485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ce5f7832e931efc06f88305171b68d5467ac31064018d018d4dd37124d972. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES71G2403664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee88781ed4592db7e9f5b618e8206c8cb01f31c66f97d008a7cdc5c2cf240ff. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES71G2403663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3450f6813c8f8db0e1f697c4c2c3102dedc39e556496585c41c68e636016d0c. 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/ES71G2500833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6618cbbfdcab7342ee5440b3b672683a1ee2049431d3eec5411f1fa31dc89abf. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:50Z), 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/ES71G2509468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecac1802cbdad49ae6cf6acc0224313095550109bf71456bde201d43085321c0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM7282578032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5c8f9ad9d7a462c67bb95b84e21e07fbfeb3fb4ee1da041e35091fe5cea2df. 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/QMDA72596299.