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 0xd15768f4ada51d261edd2a40eaff9dc06db01199f072532b92ca4f294748198e. 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/5ce7dd92-fd4d-4c5b-b185-251e340d489d.json and https://artists.proofprofile.net/proofs/artist/5ce7dd92-fd4d-4c5b-b185-251e340d489d.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 0x8407d734f0db8dfc6a3c725d5eac440215e1469ad0c6e57c07ab5429e060f3ff. 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/BCE7P2400777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b5c8aedc2e786d4c92eea3371170a21a4ff4456a25bcd71ca18523e86ab139. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKSUV2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c9844e284f11c932d4da5de739e67367e0ad30eaa8bd53e32f7c780815322c. 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/BCE7P2302784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37aea63072210ee2e4147812e811ce0b91f14ffc850b90a88b410f55ca3e666. 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/BCE7P2302612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b046c07ca4622e61cabc69c8a6ef282162631a3f42f468277eee8951372eaea. 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/BCE7P2302534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53021eabca5ef4bd8ba8fac05cb4f1aa4baa5cdd659c3576f438a06a9c793ef. 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/BKSUV2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e9703a9d4c18e112667afa4e51c4649463ca762f6c4214bb1762663e03d048. 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/BKSUV2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79bd0dfd6bd5a8a76f131197a9bcf95a48f94b0dbee8eec7d590b6dc3aabf4c. 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/BKSUV2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b5c8aedc2e786d4c92eea3371170a21a4ff4456a25bcd71ca18523e86ab139. 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/BKSUV2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41321d77992767b1b33eff0a1914d55cc38c05273c0aa5c7123d4092389041f1. 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/BKSUV2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c91ea0be008d877fd2ecd59e0488d01171875d666afefb0bfc6d0ff9ad434dd. 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/BKSUV2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f72d41b7ebf0805eafe2cd49339564fa68ca2635aa19313c48b108ca7d241a. 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/BKSUV2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9774340a4fa75c6c1dc082124b041d1d4250ab3c1109cfe0e20dfc3d56d895. 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/BKSUV2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d40183793c16a256e0fe97db664e8c6c3445206dff086f84ef0c447d5760024. 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/BKSUV2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41321d77992767b1b33eff0a1914d55cc38c05273c0aa5c7123d4092389041f1. 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/BKSUV2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d0f646c79a711da2f7e7e62aec7ae3096f7b093d9a4236bd77c2613fd4a327. 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/BKSUV2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2ed344384e6ae3c73db2168ed33c94dd42f9f0fe1916a2e0095047cb93b422. 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/QZTRX2373035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85efa9749b5e73bf239e85971633ee23206332a5fd4da599bfe387d9dd68cc49. 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/BXFKW2200006.