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 0x5c3e64e2e51e77f62b28c6ae8ef81e16e53ae02e283afba4f3623a8d4b724665. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e5d1eb6-7d10-4835-b7e2-761e7a6178a8.json and https://artists.proofprofile.net/proofs/artist/8e5d1eb6-7d10-4835-b7e2-761e7a6178a8.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 0xf8084f8cb21da3b8623aed6c3b4a35e848171a1271903b50ee51d5b6e8943f36. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN71976718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d012a044603409cf438451d74c615d4755da4b8f7420e6ed00e7bac10a77d1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:10Z), 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/QZFYY2077799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ad91fe8dfcd9e3e9bddb758a89a2333c06fb0c67737016f6a0421fa29a0c61. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZFZ32013376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0b5562224f6b2281ac0651799fa03359781b5fb3538fc0aa4b2d86ca571430. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWT2080483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea1e2432ce8da0c91051d87c80aebbe663a4843e7bf5cee9a8044fc2e1dc020. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6H2167846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb234e40bf1a1540b116bf97919b976c895e48601cf9e03beb15049905ab5fd6a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWV2142086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffddd243ace12aa67716c2baca811f87871ad9b92e26d72490779c662389cf43. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ22205866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a42ad39eefcfaf603dcd158ec0d2521ce76fd57ca21d109349e3cc93ee7e4ea. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNC2207447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b515b2a758d995ca2e4a93ab2769953d6abea3a557512a1e4babdbaf6bd2d0. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZK6P2382310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ecf7da232531f89360acf3cc082baa1ae67e73b9d47ef4b25f5d23a81ae1ab. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTBD2334036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0db91a1e16a2ea17c865ff0bc9539ad685eb31b4f6e054c052266c7c2c5f39f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZFZ42464895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0194c64684116641942714b84d4c65ef07fd5310d18d1f9e6c7f0d1fd2d570. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ42464896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1efcec037931301282065df987fa32617cf19171016cf77b2b9e755241a1b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:07Z), 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/QZFZ42464901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1447ca061f1b0b7dac57aad7c6323f39718384078b5abcccaf5adfda0051303f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ42464902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ad0dae756037ec4e446a8f8cabded008aa583f01967ccf87680deb5ec52bef. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ42464904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e5738159f5a45cc0b54a41b06cd91a06fe22f60de172f0c3f906a6a2e7e1d7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ42464899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c5a3481caa09dcf82ac64e3f6c670f08f113fbfc9f6f08ed7d4fe9894baef. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ42464898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404ffc7b64a343b73b0ed13f511590dc3990ed198fb5a66cbe9d4a15f9bf8a95. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ42464897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4720c8f1f929a7c81b287e224ed9a5e554897cbc7b4fc1942ef8fcf733af0444. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ42464900.