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 0xd1e61bcfc1a90e82727ac4cd01a9528497a5c173a9492bfa8405e6c31093b1f6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddc57b15-d4ab-4fa1-a2dc-c35ee5bf946e.json and https://artists.proofprofile.net/proofs/artist/ddc57b15-d4ab-4fa1-a2dc-c35ee5bf946e.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 0xeea74ad04116b43e3a92baed90f619d209ef13cdaaa274b3f865ef863c99ad9f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDA61854929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51df7c63df1a311ad3881e48f969b41436b28feb2df9f7e9f55751837b48f755. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES62019993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8614ee036c6560bd6ba9a02dc932b9520bd481c89211a4fd2f9e01e711351d. 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/TCAEO1921472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557e77ba9d4c2d4e463eda476df01c6e6360c5226014aa10a4145ba8922579c1. 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/QZNWY2093122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe738eff96d1b5aeef731575deb55ffb04e14ce5f3e0d507b8a7f4be100e3cdc9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:35:00Z), 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/QZNWX2088708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67583d69d575061866a2ad37724051cea53613373eb70f6ae1b332b8ed451c41. 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/QZK6P2273623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a605397cbe75c50df803e22de0c44e52401c8b132c94e06743c8415a1c94507. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:41:39Z), 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/QZFZ72536458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753f43c9b5f2e0b0869c99f532a01ccfe8f6bc2844fa66c2c9c34d977845f389. 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/QZNWT2316138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacebc93bab4f25d3704b6a7921bb2a876b6028b74ca0d9dd63febf24b7919d8d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6Q2196181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1efbf9c6bff62310afdd3208ab2a5e48aea665f22969568d878801fd0ab9a7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZRP42228361.