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 0x2adbcbba70d59eb8e3d76fd72dad60040f72921b3b8a9b605d63645c2f6dd476. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/119e80bd-ed5b-4262-9205-a492ce30476d.json and https://artists.proofprofile.net/proofs/artist/119e80bd-ed5b-4262-9205-a492ce30476d.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 0x12a1b87e9df058003cb1939f59cb39e4a94894b00993dd69c54d8500c1710ffc. 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/INS171700338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00055be63c87cc868c5627f0baefd26a8f2929a0ffcee8ca3a263d9f2c5a498a. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/INS171700339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5c8502a77b6f1e2567b2d2af03d2c12b9bd88bf20660021aa45daac605eebd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/INS171700476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00218e086108ed2ca0836155b6b1eaac33682d864bc0b67bf551be5f803dce61. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/INS171700478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ad856defc7d9109ce709d1b7f4fc53840a40f063ec3c2bca010f2c65e5a2fc. 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/INS171700480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a26bf17745efcf19d4f70225030088a92e38194ae41112ae15c85893251eb5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/INS171700482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65da2fe33bf1b7e9c519b2cd05e26f4bbc3386d67e8bc8a91fa1f41c077ecf0f. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/INS180809555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf997f47f525ddef88062becbe3d037316f58289920e2784da14dd9ba0e7cbd15. 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/INS180809556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce9f6a7bb8f96191bcc23c4f60bfd5ce4b75495960fc8720bea3546155fd1d0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:47:22Z), 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/INS180810108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dcaf4c932d8042837e9c0c6ffef4537d13b39277bb975faf48999f4e0e9054. 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/INS180901197.