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 0xdf7f442375bcc73c987232939c9b16236551bc21c8d6c02deb90c0a8701ff727. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbe29334-f921-4d23-a952-c3cc2442302b.json and https://artists.proofprofile.net/proofs/artist/dbe29334-f921-4d23-a952-c3cc2442302b.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 0xebec42056c532705273dfa4313bcc0ab444c3d487a111c0036771ab755a0d118. 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/BX8AE2300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19a7a1c2aad4d8b966fb7a00d6abb6ef42c1cd7d866614d730f48814d3b9bf1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BX8AE2300176.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd22ad8e46d587b34934330b43e0979a48fb70c877d2ee1edd33621e592973c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BX8AE2300177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1af3b7bbc96a209e71725b9260c6f995dbc367f30286105cf761cf0d6f4537. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BX8AE2300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49131acfee379502eff8bf5ce1fc741d621e3231d6aa08ffd7aa8651a7faeb92. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX8AE1900216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b4cc29042ccfbdf7ffdbed91a5d7e8908268615234856ee87471b1b1ebf0f5. 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/BX8AE1900219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb869fd62103556a841d008cfd95669bd46f3f12a9d0eca342786ca7ef9279dbc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX8AE1900222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78be2fd4590771875761cdfa9559796dd33669d456bb3fb21a2e5d5d153f9608. 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/BX8AE1900223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f80a742d083831d9525c6883230329fa24e24a3aaa702ad76ac124e0abc562. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BX8AE1900217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a24c4b6edec1313a31ebfb79978590a0838659995246f237371405d29cb5f5. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:41:06Z), 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/BX8AE1900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f54ce601bee60a71ba44791e98bd93c635c93a7945041ed5ed1c844e3ebf3c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BX8AE1900224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6947c4a8b4e5cdfec58cd4e0884dc3290b25e2bbe86fbfd86a01b42671b622a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BX8AE1900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2521ed592b7c88ce1595fcc08452b7cef0f1b14fc84bd48ad2f7488f39b15873. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BX8AE1900218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fd16ad349d591aac8930048a6c0ba4269b969052bc98c4b24178e3ac7bed36. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BX8AE1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75de6e55f5330e5790d548599bb130188357d7ce0a066af5349572132b8647ed. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BX8AE1900214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377f40ce4afb3806b5e6e1c9693518fe90c84a466cc99b7e3dfd7c8452fe1675. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BX8AE1900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe823ac09295c9378ef910d4320ab8c2de9b1a9573aa5006b4ece5fa6a5af13. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BX8AE1900221.