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 0x26332169c00d64552cae5ecf387f7d1c12c55a0813fe2ab165746777d975cc79. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc3faa4f-d0f6-4093-9fa7-41ef78485024.json and https://artists.proofprofile.net/proofs/artist/fc3faa4f-d0f6-4093-9fa7-41ef78485024.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 0xd07e99d8843ae7c742bef751c5827454529bf18c8b8e620770eb04f7602506d9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFG2316257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d4cc630f4bee25462ac1e104e1c6de7ec6ecd04c9f7cdd49a0d2112280c950. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZDA82425547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8156c04b148fdc590a90313a0e611a9e99023789adda947dde20c93337c07619. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN62407334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca49f47d473af4f14204f2eb651064ac715bbb23c7edbbffb6abfddfc5e6197. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWZ2462919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e72bbe63915a28a4aca81d9ed47eafe1179982c5bef2d9bf9f0e4a28048e3a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:45:43Z), 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/QZWFW2400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb3d26ed52d154b6dae4ff777e4c17d0310f7502f1364d5788420bfc4fd4bf0. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:44Z), 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/QZZ7S2453932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cf12be3bf5ee66c3eaa7a2f8a515e7d4a62b6cb89a57232477c6089945f37d. 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/QZTB72566332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bef876cb54d766577b2837fdf48b401fb53a1faf9ede6caf6438fd49f3df73. 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/QZHN72451463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02b8136b7b95d4083b14f0590d654664da00cffad9cdf150ea1e1c03edc4e55. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZHN82375631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c4bc06e582f04fb019f5091e707721f7e93569e8914124277d61966312e92b. 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/QZWFQ2330371.