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 0x01a75e0433766adc665bf4145656a0fcdd609789df9d2048c94a27c8d6946667. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16fbcf3e-8c6f-4a45-a367-c0dc00c74177.json and https://artists.proofprofile.net/proofs/artist/16fbcf3e-8c6f-4a45-a367-c0dc00c74177.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 0xa5e6e7489a0a65ef056fbd34c40b4fda99debda7f078c09a7521dfb9233e07d7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR59R1943586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6f08d594e2db962b7afb5890c8b7e5d25f2e13e585e45886be6d15374173a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR59R1965328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8678cd278ea792e99ff0ada72e7efd6d2bb8ded0c08b1c065826d0f99d3a589. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:12Z), 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/DEKF21900746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec6841afd32c644277b7cdb913e6f86105cc6daf4398f56a563c725426ac62a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEKF21900749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39243144ab53451b85d12062f64ac357398bf4e61273956a28b89d101d0be492. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEKF21900906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a20d0ec77d59fe5249d03ab99de92b6439fb84ae3ea22ab0b01b47e6b68564. 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/DEKF22000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0855fe42f93a6307584ba0783305f71c87ee45b0932bce6d711af09f0302070. 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/DEKF22000617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859de740a0d7aa8c45dd9b034037172864b13614bd08a8cfc7fc9a3145239952. 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/DEKF22000615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2886c8991ac279edf937d0ecafa48fe10094e1f2a8f974e0e9b8c98464800ef7. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:13Z), 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/DEKF22001041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc37c3c0966456f42958888b29a163946ee6e664dcaeec7634fea1fce59b4ec. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:37Z), 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/DEKF22001350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077b6f9b3f449a4fa6ad63da066b8aa5670cb4eed1f2de349f118e5fd7732189. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEYF42000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2882e06dcefe81fa9f72469355de82c21a5e70981995a7cca6a293b5304fedb. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEYF42000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d41cac1974b353a3a6ae613c722b13e5f42de2a6da1718f0f9b650d8fa82914. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEYF42000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328753d9bb841590542c832090b5d8fbd4491da0650e2f209257e0152ad60ede. 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/DEYF42000410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b218c3971469c6dc35d903055280fd749b0034b1e5a5ae7d3ea50dce4b1b0cb. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEYF42000411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f90fc28dc04c85be2a8a57733cfbb0fb697fa14df4fa36f989ebb3f7991cba9. 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/DEYF42000412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b5e483e1f64aad22ea8978c57301be770e3affbd1848a709b6a285e12fdddf. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEYF42000413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5eb47206ff0b69691dfc0612a616124a65fd1d880f7beec15b92cb6003f3f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0P2314785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22d9af3a0b2f598d35d0558f30304b85c37b9ac4d665ae5b9b8d5d787a054a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DECE82500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efe1ebfe881b5adf869c92c73c7d84817b393a4b97c6b6805d3dd7a65316ac9. 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/DECE82500387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e8b6e075bdcf2770393fbc10c9eb693a8dfdf73480a9bac00b7ad0ba0cc619. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/DECE82500631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0d0e8b36a933179d06eb167696f034056f672f7dcd83768e673d316dc5e57b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72402018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e25c4b366eddd52cd9047d3b4cbefce3adaef7e2854608f1f9ce87a6a7a54b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812189248.