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 0x8a675c7bec26a29bba1c726db1f9c1d78f3dd890971e64f29b44e096fef35f48. 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/4e7b8758-170a-4fa7-a6c3-a63867cedc66.json and https://artists.proofprofile.net/proofs/artist/4e7b8758-170a-4fa7-a6c3-a63867cedc66.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 0x21de6004f898832bcbb07a77854785c310e4c917427e6252444de8984efb633b. 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/US39K2055103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7581396c09cfb498141a63ede46a06db30f58996b9b174295555e9d4e3f4b2b4. 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/QZNJW2463427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190b68757efe8a8d7aa277d97e693af2661f94cb8a652c47da054ce0b2c27bcf. 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/QM6DC2090160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18adb855a5b2acb775c30513e8381b571600811e4279e262f32d33a376d4856c. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QM6DC1910896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059d2dfe29d882454f28e7131c82eb6a4d6410131d184903f7c352db18129638. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNFJ2203114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70f5be7b36b1409eeecc63a53b03c6033ee0d998cc430b837258113139c95cd. 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/BK4DA2310396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d057ab8a9d914a77c13e6c83b558079995b792ebb54dd4f4b0862d618a7280. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:09:25Z), 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/BK4DA2310394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aa7fb6ad47e50758b25ca70a5daf5865f8339d515329b9eb7fb4b06edd95ae. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/BK4DA2401818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb27ab3d914bd52e28cd91c32fe981b5b3bdde7d16dd1be62636b91c5f501bfa. 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/QZNJX2406790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cb85f881bc6726ff5414bb10c9ed9039fabfb9f3584b7b10bc09a4994d51e1. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZW9K2471755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8349e5cd189ad3a30eb38877bfd5a5a5bf9db17e636a4d925c2e97271074d8ac. 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/QZGLS2517280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2088f419e5de6ed21fb515a97d19d3360e342bd4344d5b83e6abc82ec2fc577a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMSAV1105287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cac5c9b64c017de148db9548d93e354c74c684db4b162bb33c5cb86b82f5c4. 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/USA2P2349569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9205ca7d2376eeea37679d78cfaec44e566e84610864447e231aab04abef29. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARC571901934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43633bbe79253112cc3f2c23ce59891e708cfc02144c31a5d8d0d621a4dfeb19. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNFJ2203220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659801c342f0ba21a36975493621133697dc77ce4d677159a591a8f827bd347d. 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/QZGLM2495394.