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 0x01b3582d9fc78f6a29f869f0decd3ed730e71193c183ba2473b33ac90fa5b4c8. 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/144de027-fe83-4904-b72e-db4b2b162265.json and https://artists.proofprofile.net/proofs/artist/144de027-fe83-4904-b72e-db4b2b162265.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 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 0xd3211bdf3724990522ac93e71b009f492481c73387a8c9966d5d956525415b0e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4DW1552802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05321fe018898e638b12964740d2f1e16a61ef171c6485e4863803745b09f60f. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QM4DW1552813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ce38f71c0e23a8f63f9f24ad8bead763b9ee409584984f91449083a698767d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QM2PV1743892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd9b5afc29948db8d995d40764187b913105c2cb52414fed4ff27a4263377c4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM2PV1743894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4908f0e16d63b0e79b1c6e6e11329807fcc207416c8f4ccb6510a0e48d64ac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM2PV1743895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ca478f0dfe9133393be723ff05d46e18ec8772e2f4ecaccf3f484bf43facbf. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM2PV1743899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8c327f4d280ffa3dd55219cf0a156e65e42b612c00909599d6fe30d4d6b799. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QM2PV1743901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef75307ab36724c8155cfa6e2f4741eb3feb5ea78870694b3dca9377a39ee48. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA41903615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5d1d06987e6868a2d5a965b0b61c2234c082cc39e53a355563ed0b8aec16ec. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7P2403278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebccba6550cb4a45b7a24582947d569df21e4653ad7d1c793943949ab319b5d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEN2525362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede312652f7999016faaae0b993075907389e6799cfd7eeaf0055fe1b8e472cd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZMEN2525364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44c271170f4795a54a983cd0eb72c46f83d513b438b05c3402cb51dba80b324. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZZ762524907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bb518a9c98aed1137e04df42cc61e2f6aa28fbed8b3c715ecc02d4232f109a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ762524908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577bc0d89e8a5e674df7fcba4776ea86f14f396eb2c7da99e82dda75ad2896fb. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZZ762524909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7744d3e6d939941b4d9b20d6c4fe1ce8899462c4fb823e12871a8a0065fd8d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/QZZ762524910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1682d76298ede6538d88ff45d435674d06999f94a586ffad2aafb7c5fcc9676f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ762524911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca420195195c711fa846b76d9a09123d45467a0b1a8d2c12f09364c5e9701db4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEA451800310.