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 0x4caa1d3423487261ba81633d132d51be40790af50b51868af7975bafe2c1d298. 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/f3cbc8be-7e14-49dc-9783-058ab1702f40.json and https://artists.proofprofile.net/proofs/artist/f3cbc8be-7e14-49dc-9783-058ab1702f40.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 0x0ba158f9f6974c636f5098bb3ceb9a0076d95afbe04d63b4b7c843e484029b5e. 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/QZHNC2306559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201a2e073d103bbc6200f5aeda927339867f868c52d94b81d40c3fd0b636bb1d. 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/US5ED2405269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac23cec08a93db37dd1229f1e68537cb5577fdd957e00ff9c69a95e81c8e378. 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/QZTL92429047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8944addbc3c754b2a7de5302d4c79244ca4d6dc366c5fcb9ab5197922bbfc808. 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/QZVEM2366092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0538a357c1af42262053b9187da04bcf405013d45dcccb633da892dc68878261. 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/QZVEM2360283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ad46d8cd06f8cca1816682a89359f8aeee9a70bd6278994965c43fd9314533. 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/QZVEM2366093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd541fafabe3d6929f57007c4f51beaf582897c382e1e2c20ebb28d1a0d9bd8. 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/QZVEM2366094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb5dd738f33438de1d33bd4ba788ff963d0ed61fec69d1777268ef84ecd5279. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZVEM2366095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba158f9f6974c636f5098bb3ceb9a0076d95afbe04d63b4b7c843e484029b5e. 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/QZHNC2306559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86155f564e8c88a8467f00b92dc2466d7667d55ac1b57e69c21090ee77b242e3. 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/QZVEM2366096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf356c961ce6bda08f9cfe5b46c431cfc10ef35c37fbf5ee44ea300e8d5d0d7. 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/QZVEM2366097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9286a2d61c96838176ece8ac4dc506dad66f701f0afb2602f24d26d869f9632e. 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/QZVEM2366098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a393cc20329842b3f2d87af233388e3660f970f6574d777bf162a5c5b352db8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAW2366839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201a2e073d103bbc6200f5aeda927339867f868c52d94b81d40c3fd0b636bb1d. 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/US5ED2405269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0876766b638a95010f7df81656650a271e8b35f76f34ca003d8ba68242ba55d. 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/QZRP42550075.