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 0xb9ccfe0d57e67a5d68d5c8a8f354d321795aa013598cd56d84e4ee5f4963cc62. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/501d5805-5487-409c-8295-ea86b22690ff.json and https://artists.proofprofile.net/proofs/artist/501d5805-5487-409c-8295-ea86b22690ff.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 0xa9d6e7c68af87d517840b943cadce419c10ff4015032393b413a6845540b4eda. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNA2507554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945d95265316ab549b119c272571b66d336edd713b106a698396b3ae5b3a0ff4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNA2507557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4422c2da7295b9e53aa5bb45c367d109189267ef65f79ec704c65c4be1ca1323. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHNA2507558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd903a2acf75837e825797ad303fc4bc7b76b142073bd95039fdbcc27fc338b3c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:49Z), 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/QZHNA2507559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9e8c62e46b83146f02b35ea9c368c4c2851d0070868f6954cb57d417094356. 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/QZHNA2507560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5f3353b3d6fabd2928df715c5f9e0ff00c69c5b631c64d1a296bbfdfbbee89. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNA2507561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04134d4bee5b1048086ad269c4447846f19409e8e239359816736170a031c070. 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/QZHNA2507562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44111c4a9e7a59925ac0d9c88b2bd54764e498c475cc8e5b18f99e092340f252. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:38Z), 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/QZHNA2507563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab27226b7014af360875f2a3762ecb3cc5b3e98ae5149a31586e031b6a1b62dd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHNA2507565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1799be4707b4c40bce6af23e019d71cce7dce7e75ce27bc4a3f330331b6efee. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3F92576286.