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 0xf1393d767099e8c18e6161273e63c9072d50b45640c0b8fa7a79ef65e9bcf62a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7353e580-61d2-4b51-9569-200a05a9cd07.json and https://artists.proofprofile.net/proofs/artist/7353e580-61d2-4b51-9569-200a05a9cd07.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 0xed2f1df04f4c065040f0fe738c6a8ef2e3569789fe011a9b6c1dbced77631abe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLT2H2400690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b9695470c0d64d8656e9552f113a851252218ec5bc4311e04acabd671b8b28. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NLT2H2400816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec347920c031b512016c2e648224dbcd937f9a488f9331cddca68c0207a1d9bc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLT2H2400923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec347920c031b512016c2e648224dbcd937f9a488f9331cddca68c0207a1d9bc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/NLT2H2400923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cf7b1be24af78de59f68937b7d2dbfc153aa02f78affaea59fe1b4ae8fba52. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/FREBE2400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e2dbe29d49c3483898ae7826073fa95f51155a678a4254ec1cd69ad9a60013. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES92524530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f37bde19a5c55e49ef97667fcf432d77d8904b3cdb32113efd2522cfbbadc4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QT2WN2500537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620799cd33148e083d65f85c845e5c9328cc5b047e5d55fffd7c9e7752c27813. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR96X2598849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd11a929a5863292c8f9f86e63e8a7ec880e0c8d0621c9d06692563860fc193. 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/FR96X2598850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1edfd931e6d8431661d1558a6f8de24d21cc4b03f8359ed53f6f4226dd88a9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKZGC2503688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc263af119c7e85a0a7a5da18d09cbae9bceb3e49168be1628e9cad9d784a22. 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/NLT2H2555110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402d641a2d6bcff446f71b8f1ac0111af2a4759a1f1bb06c2de1cbcfb0fb2463. 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/FR96X2598848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefafdc5ef86d059d0134e0fcdff9dcdc42e8673cd3bdd383b8ce4347f91fe1a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTBD2567559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9e4f327018b26fa869b47b3c62dae0b11378a687ad407446caec8b8b39e57a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3F52567127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bd7a8df0170ab29735e72731f9aff3f164d30b50f585ac82e355c31e9b8a51. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT3F62536729.