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 0xb505bac93c88f912fa78e215b01407a3a83e431e96d5bb3aee9c3128333396e6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ccf08d9-c554-4a19-a681-0de3c088b21b.json and https://artists.proofprofile.net/proofs/artist/3ccf08d9-c554-4a19-a681-0de3c088b21b.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 0xac09c093bc88af2734ecd58519d5b738c42bc14e8525ae0b82187ab6acfdfda0. 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/FR9W12224853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0a3264357775033fa265230136df6f0c78b1cf217e71867bcc10f82a49fec4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FR9W12316953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01419fa9eb9aa8b6678ac47a274a81f791b077a3925cffd0dc2dcb4f7a1ec1d. 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/FR9W12368072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4878617fcdbf3e86af89b9da40ad1239d076c5e987cbee9fcfa86114ded1f426. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:16:13Z), 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/FR9W12342943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1f49d3a164a5dada622988adffe3446693506eeead0177f8e133df2c6cad1f. 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/FR9W12223681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cad7f50558acbbb7a028f1fbc7b9acc93cff8ea5a72125ab9baaf196f6dd5f2. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/FR9W12444782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497bcf9e016d800a8d33577ff21e4d45d5e29088a401f5c4bf4626bb5ff8ffca. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR9W12539893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8934d2342815809791597d9a629f1512613d2a86a6ed39e8e64c9ff30f551ff1. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FR9W12470656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3de6286bfa5484ea0c1c6c1e6b4b2d303c5f04f54ee413953907743edca3cdd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12539891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fa38d47942d39c2d2d42075b574aea21566aa681ffc9fcbba433d2672d2361. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:17Z), 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/FR9W12541232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac09c093bc88af2734ecd58519d5b738c42bc14e8525ae0b82187ab6acfdfda0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12224853.