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 0xdc8971a9c544b55f159fb1b577f87c30385968fddbb19d806aff31b5c18704e3. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec97b66a-9715-45fd-bd38-87d9946819bf.json and https://artists.proofprofile.net/proofs/artist/ec97b66a-9715-45fd-bd38-87d9946819bf.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 0x1034121d750322e168a655b7cb7162ed60a65ba63649da35fd7b9db851d2b393. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2023849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fc916341febe9411e8272ae101aebb5e52ac40542c2eaf67f164deb387a6c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2023850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3129af3978df94d125ddc337cd3d9efab6eca03846901a4f3f6ff9d2f47c1a22. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US83Z2023851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548bfcca2ed36caafcac749dac820899e5d4daecb889a93a2f5f7870898e62d0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:16:08Z), 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/US83Z2023853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af39cd2b08bb236dfa79e3ded8ec9b964e4b46e654abaaa869a2cf85f1e42d0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US83Z2023856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f1dd2a02f0a658742257b9f7c6985ce99fa4363f8029f330f6b2229d4c46df. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US83Z2023857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a07ad46359e7b278309dd3b1ec3111bc9c7e258375508ba4b3c8433df5962b3. 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/US83Z2023862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfd1e0370117cd3a1219dcf3303baf7a324d9f68fa50606175b73c7c5c24d65. 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/US83Z2023863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f230ba24778ed46e13276ad8b936f282cad32606db4dc6bb3e52594d50b3aaa. 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/US83Z2023864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c35905217837d4b1461ddb781c52152f7be85707079827726b4aafa11e9e45. 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/CH6541774941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140fecf84fe21400b1999a2a3d6c724fcbd46f6cd0f7a8479d7cc192580c6371. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CH6541774939.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea46944a7e123535a54a8ece4739338f1a90d34371226b96bfa295b6d01bb056. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAOOX2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ef44933d01528d818e5ea5ab9233e186961ed36092eacab97511a4d7d2474e. 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/CAOOX2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f999d0fa173bda65ad2c31ec36c70b5605c45ab102c11fa3da58bbb3b86a8d. 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/DEY471719507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3534dd5250681fe08830be7930796ff81ef3a24e6317264e555b617ae3d8c3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US83Z2038569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc7040bc9aac53900e8182c44887b87918f0f5f3f1e2c6d844e7be323969bd5. 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/CAOOX2400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ae685cf2a9454931960356387793288a1bf1a8329a01977df1d1b9e02f584e. 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/CAOOX2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8b5fa1c1029d56c3e6a2cb7edb2074241ff02d0517abb5bffc3abd63550a26. 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/CAOOX2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a91be778ce82961e190138e9fd31b68a8d54d59c5793f366a8f8cc0069cb3b. 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/USLZJ1728748.