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 0x8ba3deeb035a8b960d09135c590750922467f44d6ece55c3e52fc1d6c576c3fa. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44c93c42-0b5c-452f-8e53-73fdc391a23c.json and https://artists.proofprofile.net/proofs/artist/44c93c42-0b5c-452f-8e53-73fdc391a23c.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 0xe35b2c6ab92fc7a2cc5f624854bd6faa0773d5a8806bfa2728448a08f339977a. 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/QZXWQ2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e5cbd8d8203b95db5d773daad1acd5f9a112fae9108d380e2c0621a3a3613b. 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/QZXWQ2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98893bfda90ed7e8da4018ae071cd6a8f8cb63235b4d72af2a1ab7f1cd761504. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXWQ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe831a7a706805ca16c4ce882e7a63249df568a20165933418fcc7226a656cf0a. 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/QZXWQ2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35b2c6ab92fc7a2cc5f624854bd6faa0773d5a8806bfa2728448a08f339977a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXWQ2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e5cbd8d8203b95db5d773daad1acd5f9a112fae9108d380e2c0621a3a3613b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXWQ2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98893bfda90ed7e8da4018ae071cd6a8f8cb63235b4d72af2a1ab7f1cd761504. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXWQ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1ca7e041d0e3689264dda1c39b53f1d5d0a9b9880ff9755e93da38f06a44f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXWQ2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef7aae234aa5e8eb9542deb67ac9820bb374d6ee119909bc77e0d9bdbb3d87a. 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/QZXWQ2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cba4215453f6b3bf54217437aca1561c652b519673016de169f67750f3feab2. 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/QZXWQ2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88840b5488d4f370292865782f6f54b60d3da2d0cac82bf0434cbc7c1462314d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZXWQ2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcb553960f1ea21ac691b2621a62cd92f2984d8efcea7e7afac0df84d28176a. 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/QZXWQ2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcdad5db1d62b44fcc7f2a2b89647bcd8ee0fdf7d50577d8f8680bf1398a8e9. 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/QZXWQ2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea56c764fb0eca199c3963a1be3eec757f3cba841f9e6376d074a9c6e7c5683. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXWQ2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd6d6a08d9ecc9c59198ffb5ec435c0d05f72dffdc7aeff084d56233622275e. 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/QZXWQ2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae183b5da2d814f94e531d9bf95db6b5fbed3d9a21c6e0a2dd74ab95e66f8b1f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USPJT2400006.