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 0x4ae3257444c593c11cefa7c3fbd6fed14fce06d6e06afcfa8f5dde6db3769222. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5257d55f-61c6-4595-a200-68a93a4032d0.json and https://artists.proofprofile.net/proofs/artist/5257d55f-61c6-4595-a200-68a93a4032d0.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 0x090d8ea905ee473e0f4e5f9831f2f44dcb7ba3827ff25920408e80c210a4a86c. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:35Z), 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/QZZ7R2552282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e441d77e17432c3c6cf4b3e920347781c12b27dc2b845d8bc78ee0e1eb250f1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7S2514630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ee198e6958b802fc45267fc8b61a957bb71f1df939a5cc43bb950b7675640c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ7S2554689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f122f4b2aa088cca195802d2d2fcefd9a603d314d75442263903be781977e7a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7U2525764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d77313b8df053a3812d8e63bf0b51a910267fc2469743c469e83c57988bb0d2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7U2525763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf647be17de9c33592816bdcd211d67b6b2000e4e782af3bf692fe0a288d9ce2a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7V2524912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fa7c524d3e58e730d0a748f15bc0a10de1be7d2d8bdb1d13e38e15b33f9d09. 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/QZZ7V2520011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9873f35053af69083e07cc135a9140d104a457e5538de23ee4db7f0e3b62a32. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ7V2509650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48d4e181a9f2a5ce614f0cda2c84ff5fc5597f2c0acc2886737262ea8adccf5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:53:06Z), 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/QZZ7V2515214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65819eeca1fe489ce1266421d33e598bfebaac0ffe96fd58506d6185fea073cb. 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/QT3F22541732.