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 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 0x9dd008f886b56c6cb9089f9b670c857f153644c9a1adc821027280332155f9c8. 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/1be18bc5-ec52-4103-8a41-0021e7a6a9e7.json and https://artists.proofprofile.net/proofs/artist/1be18bc5-ec52-4103-8a41-0021e7a6a9e7.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 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 0xa8aca59499ac1cbf3a4fb40d45fdc8e29cbaad10eaf886536d18f1bfae332c31. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA0L2391168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe91658d0215e09b1a507e583735262fff23a9717b2205a8843c33b644c0194. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRX202464619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9a3effc0e9ae0b5796033523317421ec5cdd7335952ed6aa88df594c1bb2b4. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FRX452421046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666c786c651b7446cc186934d60f7a1fcfebe9ce6a19ef4f3eb4d07986e6052a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DGA082465695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00262d47be15f853731e50bd6c4aac23fdd21d1fec0c15c5e8800682a39df37b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DGA092446176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5e2248f6514a89af9e5eab886b91b03ff55c2468661bff1b044abeeae00b08. 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/FR59R2429600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60639a086e5c1fc48851ae6db26f4b0da3ed41909ec917b9b45270dfbca0210. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR10S2475799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8519cc7f5d72039e24ba6c6b158861f279e02ca6557cc2222c7d6d03f16116f. 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/DGA062413474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0c8f2f99d8de0f51161cbd4e7ffeab37927eb5facd17ff95d30c5042f4f536. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DGA092446177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8aca59499ac1cbf3a4fb40d45fdc8e29cbaad10eaf886536d18f1bfae332c31. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/DGA0L2391168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9a3effc0e9ae0b5796033523317421ec5cdd7335952ed6aa88df594c1bb2b4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRX452421046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d1832efc346bf09d2e8de4d320dda45972870761d985b0cc0dcf986365413e. 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/DGA0Q2489791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccb188d2be92d3eb34d51ba57847c4fcb84397823507204562d6621e0beb240. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DGA0S2417301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756b2d296a2f878560fbbb8e92e8b630c2eb6d104aa40015bbcfc6dab655af03. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FR10S2547713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1690dde3babb52df6ec99dd72fe42e45778b477f0c403a4a0aaa2adc59b2748c. 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/FR10S2596406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b562e9170db4bf7e6b03a0b7137046fd6b081596ea2f94f9e5eb78c50906f4. 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/FR96X2541625.