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 0x2e14559730a010ca1673b1d45e7e6b0a9304a6b47a23aa5e75cc35e60aabdf41. 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/9c495601-71e9-4421-887e-593961a67ce7.json and https://artists.proofprofile.net/proofs/artist/9c495601-71e9-4421-887e-593961a67ce7.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 0xa2175bdab0d683d7873a5e7969fd3360f4effd6fcf00a5568f3134891e80a2c7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NOKAR2008010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5adbc58cffb9b252c1df401277a4b5f270aa766fccdeeb491c90f9e056afa7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:18:05Z), 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/NOKAR2008020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493821c7c84c19453167528367e46e3b594df83841c9e3ca498fc87b50623557. 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/NOKAR2008040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda24f7baa959b81464b0b3038ee0551cb7e1982603110e347d65db030c9fc16. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:02:11Z), 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/NOKAR2008070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2175bdab0d683d7873a5e7969fd3360f4effd6fcf00a5568f3134891e80a2c7. 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/NOKAR2008010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5adbc58cffb9b252c1df401277a4b5f270aa766fccdeeb491c90f9e056afa7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:43:13Z), 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/NOKAR2008020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde47b1a3298db6b04a950be016e8c89b150bf440037c2ebb47d491ceeebc28e0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NOKAR2403010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bb7094b4943d5a28c62b6bf57559b4533b48f6ebda618129f6cb9d9cf5e4a2. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/NOKAR2403020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bb7094b4943d5a28c62b6bf57559b4533b48f6ebda618129f6cb9d9cf5e4a2. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/NOKAR2403020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb4d18650b175686c39273ea8f7838925d3ba64b77484bbbaae704c34da8b59. 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/NOKAR2403030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944f18d5974b8788d6a473a61254be66df08717a31605818e5a9e0387ef74b81. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/NOKAR2403040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ca7e04b3579ee9374ead40ba4ce7f3112e1a0765f703e2231816fc7ebf0ae4. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NOKAR2403050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc9fb4bfd025caf7771e3c95ef8334920b9da5d6f7ba5e0dcbc1f605ab577f. 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/NOKAR2403060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1474b7c4d35c384d82d9327eebb906eb20d355ac999a9641e4a038e7524499a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NOKAR2403070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a915ea32ac2ecca286c433e519e2096b79194de3562a2fc23f0f991312e01f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NOKAR2403080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0ee3e4c117e780354cd2e7d06941f048c4fa223374dbd799cd0fca21335bb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NOKAR2403090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fe1916b9e9f7536eb172ba5f00ad15516b53b9518fd96230f4306c75efc6fa. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:53Z), 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/NOKAR2403100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2602bf0cb93de58d7fea07cfe5885946942e99b849968d8309beb0949dd8f060. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NOKAR2403110.