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 0x752a30b90a042c805aa69f4f0371fd679ef2e00c33b74e394bf6836b57c82195. 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/c86d1e5a-0e41-4b2f-8e09-84779b7e9008.json and https://artists.proofprofile.net/proofs/artist/c86d1e5a-0e41-4b2f-8e09-84779b7e9008.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 0x7964721e3c9d2131fe8d4fa968984658eaf389791be7bf037e752df738904554. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:05:33Z), 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/TCAFR2118315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedef769ae5f0f9b3c31d41993d321c756d06c0e799d814d5d9ce3821a52c909. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAFU2107650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec469cee89f0d5920d8b9d07dbedd98446b6e21e9c92cfa4b63bdb05bd13ec99. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAGB2219648.
Now All I Have Left of You Is a Lovely Mystery
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e941fd7d8931861c978e5dc09f09826a6a9a32608029e7e5fda599497cb797. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:13Z), 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/TCAGM2278641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c8d313736bb63ba357307627148a1fbcde8f2c41e4a05d3458b6f4f2b2993c. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:57:11Z), 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/TCAGO2212520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511b23451090fd26c40083e9a3d2028d400ca0d2fdf4f0ebebd9fa388735f4dc. 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/TCAGQ2280912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef0ce2e201bbdef4973e112f2b27922cd9cfc5db81539fed90fe1eedb7aec3b. 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/TCAHG2320717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9470cce17b790855916b2c5471abc0fe437bdbd8ea5965e964cce796b0544a8f. 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/TCAHH2389456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080a4999215c1253837ec7bd822ea6ad8a3f220dc245674972e59b6e93b1b278. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAHQ2308829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9d98c2f79e1a3c582b3c999622fd8a42789fcc685bd786fdf6c9eb29e7b234. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHW2483212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10a6c5fd9949b76b5efa45e0fa0d8a8ab92f36dfd0482cf75360b08a5b9fcc9. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:56Z), 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/TCAHZ2474910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442f52bd284112d118999111e58d83d07bda31a7ad2a63a655a265153011eb29. 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/TCAIC2425087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb65354bb3fa32e8e5cf0373a2cd5dc3d7dc1c6a6e2e5d3922753fd6cb5ece39. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAJC2412316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c8ae8caabb489a7f5c0703262e6b5fe4c3382653be01d99c42e4c5ee6afb66. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJM2557362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4172e2434c4dd973e3e6cdd201eeab77c77861d5526d5a255dce0a69adc12e25. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:52:09Z), 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/TCAJQ2553201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e76ec0e63e721579ca8a7a0bedd67dc635ec36d5217afe3b102124fbb64942. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT65Y2558576.