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 0xbdbadfe2508ba2af79cfe2e21cca040ad806e133a2d9586f3b05a825cb4ca584. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6add7640-6942-4f6f-a041-f5e7a0b557e5.json and https://artists.proofprofile.net/proofs/artist/6add7640-6942-4f6f-a041-f5e7a0b557e5.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 0x63b43f1581103d43bb4ec539cc7e336262362a7026020f0e14834c266f90eff0. 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/QZHNA2294407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c6d547587724d141146a0770205a7e3b35235e97283fd027396263b0de941d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ62443332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2f506ced7ae6e704439e0e3341d810fb0e3f41ac36a831a00220650b87cb6e. 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/QZFZ62443333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de99da3cc717e9b83fbc4b78479b3236114f5c98cc62081ebb11a86058196bc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ62443334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f01340387b8fa2c70908a22aca55180039d7450fd57bd0de848693eae897a6. 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/QZWFQ2333255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd202aeb622ba28335a44d0c33a6329b2c2dc3e84881a45cb02a7f154ba7e49bb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZFZ62443335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d70508aea65c7cf5ea53bb5ef3476d7e69db2a64cf9bb12657741a93bf078d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFZ62443336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bc918704cc76d1c9bbf9bdb801f7ebbe9bf1b9420127e37f918b95dbff10ee. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:09:29Z), 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/QZHN52457979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806f0a2ebdde5eda9d7c0102d8c4e7c16744b49a602f5aaa058b9fcd79c54e43. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNB2465627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081a9e34b5eac7d0e7463bdaa36f57ab0c67cec311fb6c7d3188c1e2d33440ef. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZMER2490845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36c8709a0c9e1570261172fe6eff5456858a7baccf135f938abfef9b2c49737. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:37:11Z), 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/QZFYY2543621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa8e0c2a15038e93fc92695e46463247e806c47cd633c9f3de09a6979358745. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFP2529080.