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 0xa946f95c4ea5887ed549337615f862935edec8c7ff57e62f16338459f1aa448a. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db8c7ef6-044d-4d1b-adbb-eafa1becf469.json and https://artists.proofprofile.net/proofs/artist/db8c7ef6-044d-4d1b-adbb-eafa1becf469.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 0x56e05556ba5948a1070a04488e1903fc2302c3f65a73286e77906b9365836e09. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZFZ42097581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24fdbf6c31803cdc23ae0b925a96efc601ab9a14d7b406ffc265ee5adedaba9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ42097582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456b4269fc77c245208d08fe6f186d49853d1f84983a912cd0c8e85b073026dd. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFZ42097583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfa8fdbdd9f20c63e54eaa293b1fdcdf0691eb9eb5036e378ded83b8a72b4b7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ62003121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487789b0ab15f491a6998e3e8da7194d6ff4942dd3313570890a7d352919bd2d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZRP42245049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ecb4f5259a2f96799d76dc2a06e5a0bbda64ed95eeba80111643456e05b90c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:22Z), 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/QZRP42245051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb5d764bc45b83432e8ff69623d0c7627c131fbb15b82b3a374376925e879b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZRP42245052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3070d57bc8b476b590fb14f0bfd4e8bb358782860fdc534ad3c9ba0e068958e5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZRP42245054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff9ae53274c0d4169513d00616d2c364cb410d25ac8746c78dcc47974907af. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZRP42245055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28da04ee2d79e1a432596e5d150bd7c084483c221755f88a2a5208845aa558b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZRP42245056.