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 0x3ca5904ac92a035af166626a8a6523020ff20f3bd0544c1e3e7137216b28adf2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19d5c878-c433-4447-b678-bc0fd04d8d85.json and https://artists.proofprofile.net/proofs/artist/19d5c878-c433-4447-b678-bc0fd04d8d85.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 0x928d86bc4b300932eb2aa705fd6b0fe9d18a2bc81ca3bd49ede6842a082f72fa. 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/USJ3V1838396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8790da194f89063be03ab64d391169d6a2b6439e9adcbb3bbe52257edcf0c02. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USJ3V1838401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b497b3962f9dc8c291e8be6ec784181b2bb47f1ec9479caa27dcc809d922a. 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/USJ3V1838402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00beeab8ef21d0947b01c00605a564161090aa5d75c11c59cc32c4de23d7dd4. 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/USJ3V1870338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52480e3ed6a426db03de72f064b00c9e0bc2c8acde523bb2cbd247598acfc890. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USJ3V1870339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c99bf70b85565b1dc86201d862bbe5824ba56ba40a4b58afdb22bbc04b5185. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/CACWV2076688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19e44d652fdf96bbfc8cf7fd7a01c7591ff2744c947a13fda4314857ac0ae89. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:44:24Z), 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/USJ3V2019116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad07c3e89fd697e5b904b84970f559051065b5b4a97e9985dc27050105c056d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJ3V2079275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b0025b8153dd91a7089345ded9b542630c12e7c363ec0e969dbf00552e27af. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USJ3V2079279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967c2fc1d51c5047513385eaa827321ae8e9003a45d44ac983a16d3317d7d1ab. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USJ3V2079281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205ff33cb9255cd41c287ed59cb7ca7320e71261bccdf1aac1a3dfc31f6d11bf. 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/QZFYX2372817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063098e66ba44ab13b07a8eb340e33583a3923a1fed19e3fedddf883ae37a932. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYX2372824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf3bb1a28e9d5909bfd5c4bcae2497129a706420cc88aced1903ba233c6b347. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZHN72365640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c17072a05afae759fe61e517775665e2c45b952f90d77a58adca2e2afe51275. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USJ3V2384285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00aa8d61a85bd783b8ff770076293fc9043629e4f98e9a82892af47f0cc21dc8. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTB82491793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfca4df7d103a4c471b129ec91b0265f21d8f409e3cff3a25b4fc0ab9ba2a96. 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/USJ3V2419829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf893ef7f8e8c5b8e0b0ee68ca4fbd6e8618df8987c87d1b254b57fa2af84d408. 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/USJ3V2445537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dd3f31920a76a2471745d14d0227a4e417ec3028f0910a90fb062f70c2ff45. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USJ3V2448068.