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 0x945a753f7b53420dad0d008f1196f1f77c8c5576830150f7cb67da8557e9ab3d. 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/8e783b9d-3c00-4dee-879a-8c56bc42c2a7.json and https://artists.proofprofile.net/proofs/artist/8e783b9d-3c00-4dee-879a-8c56bc42c2a7.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 0x2d5a45b4acd2851cc07472239a56471221ebad022471857aca8c5d869723ae20. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ITUM71501389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fba2e964312758521c83cbcbdeeb1154c0be61b3f661ec0695b5a3f4593ac52. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:30:53Z), 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/ITUM71501390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de2fbe7fe04c267a9df2fe37fa63d85ee7e5b762cee751859586f082c42279d. 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/ITUM71501391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31745ea17f215bd90bd0a151cdcac32edd2cc7c2f8dc322e0f1ba8e051ed619f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITUM71501392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4da0d99fc82869c7b3ec9b5f13a0dc56b5992b0da4da05de2576f7de3419e2e. 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/ITUM71501393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a54731f2aaa7f75f879b5a0a838fa80c985efd20f2775ebf98db56531a5f3e9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITUM71501394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca11f9736d10a7047c4c16e30709d6805490beb8e5923e9a17f812b64eb452d3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITUM71501395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceea77b8fac439d879f707dd70e5462c947bb1093899eb7201ae3a0e3c77671b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITUM71501396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7a8dcd35e8b2c9a5d9c8f40ecf7ff4d50f9dc6aca092914e2e8db882b97479. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITUM71501397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45d869006a51650af7657883718716f4f24b38182bbd93e04ac209b6b332af2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ITUM71501398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdf4ef540a08777e47e9049f1ae5169653fcdbfb1196c1e4195bf76a79c5fa7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:36:45Z), 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/ITUM71501399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6627a3b3a298359579db8155fcee21ff615846911bd6a0e1d9f45fe34fcb7e1d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ITUM71501400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749cd0d9eef121e516a2baddac1221123da3c24d4f36d5453865e9e8066a6d6e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITUM71501401.