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 0xcd9ed4c89c9bd73faf62bd60380338a1c87fbd09fcf659aedd58ad1a21a8fad0. 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/e4a98f59-a8f7-4223-b61b-148e042d7427.json and https://artists.proofprofile.net/proofs/artist/e4a98f59-a8f7-4223-b61b-148e042d7427.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 0x61ef78945da16ceaf2944f701c1b7a9b7e56ddbaf09a186993184559cb91c360. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:56:06Z), 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/DESE51600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d1126dc955a892e852ec75bf865a5c2ad2304353c1fec71ba384ca872817c2. 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/DESE51600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfe4615abac5666fbf9c7106a25a105296039809cca36cf71f151695d65d6a7. 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/DESE51600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202adffcc6fbabe460b31ad7e1825ee5fe5f8288e59749f4385e492b7579cf3f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:39Z), 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/DESE51600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6641f1bac0b1f1be713e1af9ce5e299d8faf04f13ee24233276cb0cebaa9d845. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DESE51600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f849c5a3aa77c655947b73b419e54a95a63d19054bcd873fd312ba76ce63b91. 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/DESE51600083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9482cd63ca049f69c3b687530f1df6de359982c5863f8e440cfc1fddf71d30dd. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DESE51600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492887e344aa7fd52acbed452b6b78acbf5fa3f426db4b709fc9dab090c2da4d. 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/DESE51600092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9174272897911682229a61feddf1f6f43a9ac3e1c56dfbe06e3e21a6e1a79dd. 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/DESE51600100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f98971e603b5a89b7118bc5041a67f441d578a6789a9ab341bc06cad99a57d. 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/DESE51600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d3b7f0acf14ac161b69f10191e18de202d840b60d7c27fa50e78fdc740e2f9. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/DESE51600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c68a74b9c788e206adab735d28a5fa0ecc18a52ff1e8307f21241adf684ca55. 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/DESE51600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581c23091e05b50c6b2a21622778c632890c73705e678774d3314d1d59f5d133. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:45:35Z), 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/DESE51700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8729c8c7df8d747c2224e8bc25ab20611daf35ea76dab3f177f288997d6a5981. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:05:50Z), 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/DESE51700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b47bd137bdc46417e4d99741e9ceec85506d0a515a9920b5dbc893b5247b507. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DESE51700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2331d2b9231925b335e9020d0115574f6de49b1f0b93a453c2483ee62dbe83. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DESE51700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca9937a53a294ac7b4f5b80cac5fe4579b570ec30fb37c28e71bd62ea28ad84. 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/DEWG82000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61d7e7bdbab0fe9cc1386967283c3927699a8ce22a3c996d378494af3e75749. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEWG82000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5404919ead2355bfc6032624f81bf3089440586ac0edcda9d045af96533d557. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEWG82100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7a9ff84308079f505ff48e71c1cac2342e08f2c85e91c3a3086800f9599311. 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/DEWG82100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f62356b8e5193fe70e9e826b65e03397747da7d2a5f7c05fe4d5e3a9123956. 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/DEWG82100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76846594e49828d7ffb9a96419f98b0e5e1919870205e1fd3abb6c594382a22. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEWG82100052.