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 0xc484f967e633f3c82ec8a24abeb5a34f396090606f2743baf89840751b77d06c. 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/69c243cd-fb6b-4ace-b744-0389c3dde536.json and https://artists.proofprofile.net/proofs/artist/69c243cd-fb6b-4ace-b744-0389c3dde536.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 0x09aae4feed257f1bfba18876a6cae82348251dbeeb5f538918e2fdf4db7b0e74. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZWFR2459746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c3210233dc6419faaf6a49a198f4ee6ff2d8b3f2cc8baba074a0955bfeddc0. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZPEW2531061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe829a2599c0be47aae1671f57ee9855f90d49638c2cde1b92ac3b6963d947b9c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFU2476582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96144f9e30bccb6a69a395ecc5131596aa76a69b286d00795630e5d3d02c30f3. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZWFU2476585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bbb9c5e204f85a3d7aa15565a1a6f377fc4754822efdfb49fab8bfbbac42e7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFV2460232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3b2bb74d15dbce9d802744c4ce2d6a395b22a5dddac1529eb19143b9abfe99. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWFV2460233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0743832005a53ae166f231470015116b493543ccf9057c401b7b8d2d4892adc. 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/QZWFV2460237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc812a51d6eacfa0cdf2d814e73942c0e0547ce83e883877d1566983e5f79ec8. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZWFV2460837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55759abd0499263409d6a0f53605b8fcc788b80dd0c8f8e999f88fd3557eb98. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFV2460838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b6b3e7d592b1202a7ae08e0dd4a3843efee5613f2056c93d2a1ab977d84409. 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/QZWFV2460842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ca0c24dd405e039ce77caa8561073c5338c830f55e2be10d377f0aaf920698. 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/QZZ792419173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0212523c786f054e27be6902de29437757472c865e5951ef4ffe94b7ae6d78. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ792419176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc69377533b49be68c05b49cfadabec3f3c694fd0928fea4e88dcdf43bb7278. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ792419180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bf6c7e4bc05fed4cd134d7b5f3b562dc03952ad5c6135dd40671b3ec71fa4d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ792419963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcafc3623c5fae8d0f3fe476ff3094f42ef12e7fe128a29aeb51a1a0428a8b90. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZZ792419965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c8c0225f44ee7631f71ac0edf01baf14ae507fd148efb36fe61678301bd32e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZPEW2510393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dcc1705cb47dd418ee12e6198f693a9323e3911d8b3a9437aef40b224ac36e. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZPEW2510945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58525c3ba11e62898b1716fd3e7541a9423505acd28b7b4cbda38ae1ef1562a3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPEW2510952.
i want a hot chocolate, but mocha please
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c2297290f2fa820fd3099a0fbb863a8433034f13874bfe7591fbd9ed22b58a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPEW2510958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ed67bf13cff057b99bea57e063f5373486300bb6cc25665ab9990f08b4a047. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZPEW2572171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23438e227239608e01883c7dfd8dd163f8ae84b5dd7152c18b33c012eb2ca4ca. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZPEW2572172.