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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08701641483eaebc574e4115a61bd3fe66269849bca079e1a315a588bd183fe8. 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/1c3b42c8-5744-43b2-8e2d-cd632d2570e7.json and https://artists.proofprofile.net/proofs/artist/1c3b42c8-5744-43b2-8e2d-cd632d2570e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Chorus Line (New Broadway Cast Recording (2006))
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b07221e9aa59c7af4861c8a2b5e74eefb2a243f7a4d295af288e63924b5164. 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/USSM10604382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1340df7c908d6bddc9b0d2af25970886a7219e5a9bce62bf818ea0ce80ae80ea. 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/USSM10604383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc48f85fcf317d5069b689e43ca558622b74cc6d8adfb5d6c50d44961df0fe1. 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/USSM10604384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f8c02f87c04f512480dd13520729c1e6fa4a6f3801b1e45efa520b8f64cd27. 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/USSM10604385.
Montage, Part 1: Hello Twelve, Hello Thirteen, Hello Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fd6c4c825943334323023d33eb0ca39ef8b4435363bc669658d443d0c84476. 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/USSM10604386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a90b4af614fe844bf0e8aaefbcb6bd0b655d2dcb0352daed84c8a44181098d. 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/USSM10604389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d30d92623a80f63b229f9e2946e4034e8c62819f0795f7e8b66834774555fd. 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/USSM10604387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa944a4b38adc3085d23664f4178c9ca63d53c65dd360f3bff9014922c07644bf. 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/USSM10604388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bc4ca178ba32e5977a6a8f0491826920487f454070360b011b285ae80c8276. 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/USSM10604390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2740c46dbb38c56d6b0ff4859f4c6af96fe445beae38f2f380beed5a9d061f. 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/USSM10604391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844e09d88e4a7bdc95110eb55d1681dc92e119d3bb1b91b927f8edef51a8007f. 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/USSM10604392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f03b1f9797d9c227e9dece8a361dd33451203c13b8a3244aa3aebe1fbc0e86. 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/USSM10604393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a250257b3d192cd92b25f8909dd97705440c0f5e0e27b230733ac2ec0097ea5. 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/USSM10604394.