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 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 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 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 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 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/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 0x0987c5ebc7d63522c148ad6f494414ed69f55ad493bfa3b31eac4864117cc8cd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US83Z2023852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548bfcca2ed36caafcac749dac820899e5d4daecb889a93a2f5f7870898e62d0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 0xc6da58723baf67faf33549a92d9e97662efe58f7ab3f052373499f3f148e408c. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/US83Z2023854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee02a1d0dbb92b30fe91d20ac662ab24169bf3e4fb24a03f0dd344f1ee4779ea. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US83Z2023855.
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 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/US83Z2023857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad478de712700fc8b89c3b59bad16b28fedc131fc71c4ee0b78429e684d578f9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US83Z2023858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddc2b7dcf9114e6de0b9b9f04d7835e989e24f80108aa4bfe34114374ab5dfb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US83Z2023860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a07ad46359e7b278309dd3b1ec3111bc9c7e258375508ba4b3c8433df5962b3. 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/US83Z2023862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfd1e0370117cd3a1219dcf3303baf7a324d9f68fa50606175b73c7c5c24d65. 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/US83Z2023863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f230ba24778ed46e13276ad8b936f282cad32606db4dc6bb3e52594d50b3aaa. 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/US83Z2023864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51b766b7e861adb9c04adfc897a0be148f7ae999fb1fd530094f3c07f3db42a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US83Z2023865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231a3fc0944f905d6116b83bc474056b7fc30b90ddc89e017e6bc28a5a9c7356. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/CH6541774942.
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 0x03826a67bd381b847cfe9cdcd777e7c879efa93b94524da27095be56a6d2424b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CH6541774940.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea46944a7e123535a54a8ece4739338f1a90d34371226b96bfa295b6d01bb056. 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/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 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/US83Z2038569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7cb5093373fd15ddde262ec5535eab7eb08c804f6feaecc43c6b732ceac8b1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z2038571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778085c283f78d81131284e2f743e88b37bee78c23a95d68b14903004a5443eb. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/US83Z2038567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9bef29c93ee9cfd7cac29b9a52bf48cfe578fedbbc137333dad9cdfb3b9404. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CAOOX2400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc7040bc9aac53900e8182c44887b87918f0f5f3f1e2c6d844e7be323969bd5. 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/CAOOX2400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc260b358f4302070fcca5489f273297aeeb762e5986fb847a4bfe1099952027b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CAOOX2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ae685cf2a9454931960356387793288a1bf1a8329a01977df1d1b9e02f584e. 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/CAOOX2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8b5fa1c1029d56c3e6a2cb7edb2074241ff02d0517abb5bffc3abd63550a26. 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/CAOOX2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69185d191afc06a5b0f4c79d3e3b9a3bc19648e03dae404ed764aa4430f9e60c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USLZJ1728736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26894b0faa2d34775731ee4d987a8781c5d7408227c94abefb9ff85ffa8f108. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USLZJ1728745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a91be778ce82961e190138e9fd31b68a8d54d59c5793f366a8f8cc0069cb3b. 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/USLZJ1728748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef8cdcf51e5f20f3b16b982c1d1a9df1a2a371db5ded55d326ae685bb3dfe86. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBKQU2135259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18678f6088eaa462f2de975f58921bcc1c02bb304ad9ba7b5e510baa3627edb0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKQU1853369.