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 0x5bd58fd9f8f4c56ce4f08d92f9349d63a961100f487f2d0eccfb933b85a6e8af. 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/b4e37feb-b1bb-480a-bfa3-b1330fc2024f.json and https://artists.proofprofile.net/proofs/artist/b4e37feb-b1bb-480a-bfa3-b1330fc2024f.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 0x3ac19d993134fef73e23333271f445cc8efa9cbd03402f8a4cc467f538a7d80e. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:19:39Z), 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/QZHN52040671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf60e847c57c49ee7a7df8f66742f0695322ceea0e219361f0d59f9ae64a0794. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:04:27Z), 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/QZNWR2098345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf134dc5d869fa2e5803083046622ae6441acbbb2bf7020564cac2b55cadf0f8c. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:20:22Z), 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/QZNWW2066764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a3c796331451491dde6081fe380f6b100d7ff061212d6ad92e54378017a018. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:24Z), 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/QZES72124584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984d27a09f3e51811b41400966e76ac564a1a272c6740e3c10bddf2ec8fe3de6. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:41Z), 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/QZNWS2252435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70c1dd400d5d9aac38e97f2753f7afe951a50c160a90c03ba0c29bcef2e85b4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:40Z), 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/QZFZ22354695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd3737115c6bf2fe372d1542896896bab956f0d537e5efc9207334ea5655464. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:55Z), 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/QZPLR2327777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd0f9753a0cbbc52f5bdb02b6234686f0bf05f14b0e8aa658902c7c6a2d3f81. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ32483371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b3ac14cd9bb77b3e5652f46b08bd02103660e4f22505b8dc18c4201c891c25. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN42403929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae62f138ee64ddd8fad8da5afa8b53dee590bf9c75d5c1dc4fae214cdca67e26. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:42Z), 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/QZK6H2485287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed16df18cd75f19cbc031585c4048c378afed69e6090e4e91ba0d0f9bc9f07b1. 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/QZNWQ2448034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f30c4b9453d45b54a43446faa239de7d5dac3c029448457aa098a3b3495d469. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZNWV2486044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c0cc33eee2e902aa4e7de5981f1b1077a05921287acfcd01da1fc50042a449. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:32:39Z), 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/QZTB42417911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6921d6f13c22d6135ac462434ceaa4a9916e876fa7ba3e35036820d8fb1ccce2. 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/QZWFK2450621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12390982d8f043bf803c91fd6be6553b1be84e8c510ee1b3791cad7b00efc404. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTB92417347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fca7927ae4ffe794298f23ea91d427a27f3927c7629379ab8f1ab8e354a828b. 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/QZZ792469516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5298dec945a857e6ccdb4533cef18ade4c19cc5fab14c7ae303dc17e5e6c8299. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:17:43Z), 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/QZZ7Q2480743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd69c818ad6ac045c318f4b6249d177e090fda47f9681c8d9e56490809b1845a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:39:13Z), 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/QZFZ42519653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ae8b55eaa387958761ee49e7cdf612bb50044b596dc138dc874ec3559e968c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES62549843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128ed5a2063101d7011b13fca218033cfbebb55950d8a9851e37df647d91cd4f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWZ2533389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555a8d99b87567f209ad4c52535c2803d44d948c8255dc97db2728a6dddd0074. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7U2585550.