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 0xbec765534f491e6bbbc2459d9ddd68abaec639e9caa8c65efe3d732b5b4eb4eb. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2735c632-8085-45cc-ad3e-aee27d01bb69.json and https://artists.proofprofile.net/proofs/artist/2735c632-8085-45cc-ad3e-aee27d01bb69.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 0x6358f0a22d99ce0516272af1779561af697882bcd8129f9beea75c184be1bae3. 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/BCJQG2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b40c821dc611969c12f99a37418115a1947ccba251d20e946570aa45adc1ebe. 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/BCJQG2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d288afd6e338f7b190aceb9531bb52c811533ee431c5ca8eb4ff193a0db9fe. 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/BCJQG2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85df701c7ce9628187dbeb348d1c384fffc549e64fd0443fba8b488b82b78edd. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/BCJQG2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a638b87db9bd40170aae3a47bddf57beb427d7751050f7719a277cbaa3c6b8. 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/BCJQG2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8442c92b9abe57ec2078fd92fdc5095367a8b5a91c9b27f794b955d993a247. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BCJQG2300013.
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 0xf36cf5d14f2642aa3fe3445264ef136ef3fdb06092c498218de8c12f09ab9f5a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BCJQG2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c956eddd27bb4bde1d34c1d30ada08a4b09dbb055ca4ebe324a01a0d143fe8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BCJQG2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d0dc387f448a258b18d7ca04366cd417ab70e6880788e17e19c736f77b6f10. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BCJQG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce49ba12174555bf14fe466dfef06cfa5d2d49f72da60061c8812e4f04b85096. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BCJQG2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe980142bd613093383dc675dbfddae40bf572acb8b189aeab63c3b9ebb5abfa3. 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/BX5Q02300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418fbca783bffe1cdb0e08936ed9768295c446a88c2ee873d2a2731299d43ce2. 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/BCKWD2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816685e15801d08abcb08ff606c030a4327a988459bfb18d6c7574c08e3e1916. 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/BCKWD2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232b9868d048f579b99d0f4e584d4a213123c88f255fce4fee96ce42c2462b78. 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/BCKWD2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1b6dec5de8cf2b18f4f0c0f61d6767a093ce39c4cdebf55a3170119dd0e125. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BCKWD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44aaa1413b893a1e91c9ce52a4154051d5f1eb7725c7f7e2e124c18ec30cfc3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BCKWD2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e1db6d3537a63a93706ad7124f05e98be9137637b00c292ead71fdb006bf89. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BCKWD2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe625edff56fa1c4448edd8e650d52ff3518d5fa74636f5641bbce9de8cca5ffa. 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/QZNJV2367681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e44329d4f65d05b8a65ef152ddaa3295435fc020927e1790731e159cca4209. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZNJV2367678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734295108d319d1d3c366122bf616526452393b0ed8ab512decae706af5e9a4e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZNJV2367679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b97b32f733e71809966a720564039626980b950b0301948073812305e259ca. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJV2367680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf3e91219ed646815f4c407c845f7e7fea8c443ae68690f022bf242ec76c83b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNJV2367682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7594873bb4a01b1781c553c607e56f74f2e61dbd6a6e82e64dfca3a222c47f. 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/QZTPX2279553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f0672cce14fec22e336117c3ee49b957ae549a4e035ec6a3ac711e15fb16d6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTPX2279556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2442064858ba559f4b260d7e586468d65a1b91ceca53b0c25764d632d2b30fc8. 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/BCKWD2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818ddcab049768e9ba0d83df7fb5d24351bf9a4901bfda49bac9393b37cc5293. 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/BCKWD2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec99c5611e27af65738b679bc441583c87e3656924d4ccead5faf170656cdad. 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/BCKWD2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bb98bc56b944dc39a51bc17e178b749379521231d77c73dd2c8c0a7f7b54da. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BCKWD2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9148d5528b6f284e92ed9c206eda58a533262f063f968ec7ca89567d6aaa0ae. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BCKWD2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124180c6066a4207d6c15c114132c34323d82d9dde45e8f367ab9037572df280. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BCKWD2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dee20f7601d00a7d33802bc5d62ca5dc774651c94be4de5c45b5033bc3e538a. 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/QZNJV2132361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144849390bb91a85bc9bd3d3513446ce42b59e63838870a53150c94514dc4209. 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/QZGLS2072029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d77138d991c892e0322fc801bb11d13340d80b0daf47dd0a755d753ec4a352c. 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/BCTVC2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b7c3a511d7d46ad7b0d238ebbcd0519e9cbc986fa773438c0cba9eea5d6a85. 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/BCLJS2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2946a5ec59112138782e7be38b0581457b1a2055247f033d9a94301c164089e6. 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/BCGOA2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678f89ebf8b6c4705bfe803b1deaf6356e9b21289d84b1aa9fb5f8ba3a78c478. 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/QZZ8A2321640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf27d753898737aca1f45b8bc0cf61e3c629944ac27659fa13de47fba2b7f79d. 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/BCEK82300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329ee31cb5fef3cf4ac8e3adca0ffa92f2003cd65c93b3d22c9430aa2970b7eb. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BCNA52400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44a24562a996180cd11eaf31fedfea5d9228d6a64adefa7745d31b98ca474e9. 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/BCEK82100033.