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 0xac4df2cd57d0230d7131fbd9c24cac107e58a8fa791183d6076609a40b3dca28. 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/70961f7b-8c9b-4282-a0b2-ee27445038f6.json and https://artists.proofprofile.net/proofs/artist/70961f7b-8c9b-4282-a0b2-ee27445038f6.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 0x4bf59259aaee0ebd28285234b37d50240eb9072b0c92584269b68e39eab5dbdf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR96X1972673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26065fdb3b914a28dc548b1c0cebe04a3ff57d5ede3ee62e3a27054c1684aa7f. 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/FR96X1972675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e95e426994725a00fb7144c43a738541ec3e94fe94a2bb2656fb135b6ba6569. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR96X1972684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc3a251e95d8a125f33e1256586ae63a3599bd750aa56df10688a617c039e84. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR96X1972693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebdd7c3fc3c0fb3937acc5e71c25ae31d16505a5f33d48e199396419567a928. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:58Z), 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/FR96X1972670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1222cb4be8d235c2349f0b5908f37a3af3fdbac2b22f364b5c2a5379bb78bed. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DGA072138898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b15cc5f3bf024d220ceafbe95515127bb0f229fa11746a92794342da36bbb4. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:22:38Z), 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/FR96X1972637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001e3390c126e9f519204275372b24fa91b284ce1258ffcaae7518a0ce37231e. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FRX452100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157dba78011b4915d1dad33ba2df97b817762e30dd58b1f1d9ccd856774d8c10. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/FRX872112511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f7437f2b1d302ef4ae3c69e58eec264fa7694cf6e8615bdabc93d62bdfa537. 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/FRX872112518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5367c6c7bf7b0763b76080a37b95e120bc77e2afb5a660974b80580675254d. 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/FRX872112519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23095b0b2fcc46b67d0dc630bc489eafdb08ff1556412f4e2d33e8ff8cd5fd6. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FRX872112522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db2e50bfe184745be0a00769324b60536763aafaa697d8103cd3a68482811ff. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX872112530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc169aa28cf45f709b21cff5a4d14b3acb79cfe9b05bec604332f1e04ad9135f6. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:35Z), 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/FR59R2287971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cdc19cab4f3235adc829ade7cb71e9909a5e7fa053b2c62083dc769dae91a4. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FR59R2287975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf484c733302370842ce3589c77b7aeb57dd5c8b073d4d9a921118c630ebf7e34. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:23:46Z), 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/FRX762244621.