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 0x766ff274eae7bf438b2191768b6033cd677df0173ed7ca8b636fda0f73c62e4d. 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/8265e903-a49b-4e14-a037-243ba0db38bc.json and https://artists.proofprofile.net/proofs/artist/8265e903-a49b-4e14-a037-243ba0db38bc.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 0x84e2e7455428b97046654aeca665bd330509d88a7ed7648216e0096247f586e9. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USAM70322502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc326b36110dfbf6568bb28942aaa63e07b307c763281ff386e57cc551c45f3e0. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USAM70322503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ba326dad853e4b9722dbad34b2f1522636dce7fd9e3059e3b48261e08fc09e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USAM70322504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cd510657aa3cf4a75d63bfbd1c5ad5f2ede53d4eb5b539f075c449a38e68df. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USAM70322506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a05ce2186938fd5973cf7918865be49780a203f2230c479ccdcdce9ef28327a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USAM70322509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd3118a38b79f61560da05977ef596783ed04516cf80c341f1f82e81eec3472. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USAM70322510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e02bc155972a57ed1337f83a5676ceffbe9d76ce40f663b31ab89a349f0fb78. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USPE09000215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1b48c6c9f1e84b67fd9ce29c90fe33f41356480f73532d183bc6c7e237c6ad. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USPE09000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefaccd7e1fab7f71b8270e6f2a4e8a8cf03b34fb7e9e3eb490513aa4d97fcd6. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USPE09000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4d5798e7b10ccf4d8462d4f0c6a90066f258ba28e812a7705a7a1611b9e244. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/USPE09000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daa276d379c2ea843ad5620167b01c13806fb3233cb39ab8d835f1c218766b1. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/USPE09000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f73438be604d01c9913da31bbb7eb1a246da91aa3aecc8b65245e6f8c042983. 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/USPE09000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdedf50f6ddb2e825dbfffb81cacfc48e2510b328e7f15521418accddb3c84ef. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USPE09000223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a718466bd18e08d57058e7a918f28c8f39dceb546150e935779fc6ebf22d506. 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/USPE09000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b45d2a160f3da3de93fdb370acd2ac0a65da40930af784b39e3854a9a38878. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USPE09000226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea90d1e6b4188498c1a98a90d390b8c59a82831bd6a7c534eae2f96621e56e05. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USPE09000481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1180026f8261dddf3f1a2ccc80efe49f65fed4499c9588cb13ebf7a0d1f18bfa. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USPE09000482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26fb39088bd827e8a88a090b0034ed03c2e62e36fe50cf1f8d14869723a3daf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USASN2530010.