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 0xf9413352be9445f5579832bc966d9e329d4c4b5b5d5557314f38b40849e32e8d. 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/daecdbdf-c044-454e-a388-8414dad20d20.json and https://artists.proofprofile.net/proofs/artist/daecdbdf-c044-454e-a388-8414dad20d20.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 0x1899cc36b0d8f5627b010ced357ad990abb9d02012430938cd6a862d780f61e5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732134318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f01ad8ecad29ae48baa91a2d1036908773edc3d2e40a7080d908e2cf9175747. 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/HKG732134319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5807dba4d44eea3a43830c6533e4264a930af409c595a306cd782adc55c4389. 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/HKG732134320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c21b111fd6faf8bed2adaaf158054616cd6e263b1fa9d5a41a0e8214ec7529b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/HKG732134315.
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 0x148beab31e6356d6469267f0ff18341e20612dd3247fe26fe7b4d1ef4f5178e7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKG732134324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e67f879d9aa2e6e247660a5e60a1b47465bfb17629c3d46f7564694c8e3ca9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732133655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831dd7f63c7de23b03d0257ae1a5e57866842564665bf1719abedeb685c089bb. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKG732133654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf2800988c9e89f4d1ead678531b622edc008402cfd2fdc0d28c0c547765181. 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/HKG732133719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41034251e677fceede7d5bb98bf86c3197ff6e598c4f8096b154bb9cd21dab3. 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/HKG732133723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427bb47036134011b87cad918eaf8f71beca733a86837336d8ca7afabf31c8bc. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/HKG732133722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec37f8b1e44a703ee38068214f449b084cac828104eec1e5f55cb552744a33d. 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/HKG732133895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a26b5d1354a0c8d13033fa0ba0f77748efa555138e14bab0f23484b398b7bbe. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKG732133896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a269db7aa80d79f6bac4ff4bb41ed1a13a80cb6c3fe101092543769817b190. 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/HKG732133897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b203be6b3a81e16119669609d62bb76109144625de9fab23f667e4d354e6bf7. 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/HKG732133900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f3cb8cd699218583f606d338f2b2fadbd114369f786e8ac7f75ebda1074bca. 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/HKG732133902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d25f42d2f858fe3e28ee2b6fb9f734ab192a36198a34701a04082976381825. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/HKG732133898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf664ee7908e32012ff241c7f2a5c691d6b86c9c455b7e40a0aef0a3bb99ea2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HKG732133899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffa5372ffd796cf8c2a10eb211cee5b9caeff21e13bdb6e2d8c8eff9dd27892. 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/HKG732133901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75101096f0a04e26ce5afbc4693ed7ff0cc84feab0719e351875defaa106957. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKG732133903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dbc45255152db2d67da1581fcb77612c26fee81b947c2e25cd0507d2159885. 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/HKG732133556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cfb48b302fc98c312bef3f0afecb4ec9da1533f7f0087f643e67152f9f68c2. 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/HKG732133352.