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 0x8e382fef595a5812d76294043663544e3c5864ebbedf4b29de766a80ae47a4ba. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cd9c838-ff97-4c18-a317-42c5a89cbd86.json and https://artists.proofprofile.net/proofs/artist/0cd9c838-ff97-4c18-a317-42c5a89cbd86.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 0x892ae0f194253203439f51d1de8ddc374228e9f9c7ed093580f2b6a2ee6dd055. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6P2478444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a7ae72140dd3351d7b3983930cdd2acaa4617e546f624171f0ea33ee61e685. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QZMEM2431789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ac32ed158853e8b4fbb9e6824b14cb398b7c795bea900acd02889d3af27786. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMEM2431790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f083efe5fbafea938df48c9494ae9b0200cbdeb206d8bb5d2d027911f245da. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMEM2431791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39831d77252a94e86c26530e1c0e6e4d773c125e781ac2b320d13ce1cd065ed. 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/QZMEM2431792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc57d369a81116b3b42a6f6df3d63cc08dcf853a3bcc785abcb522938c86875f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEM2431793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb193a28fe4bf9fa943322b6db0ab36f155c037a02ee40d3020495edda96cbd7c. 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/QZMEM2431794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45079f597cd0b1cf40eed71864fda50b1870f02bdab37b5660bffe7d2f1d8be9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA6E82401597.
Animated Cataclysm 2: Catalytic Converter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708125bbfc5a80daadb6ea64da556ac6c2b2c9f4857a3dea9639d1c9a7c0cc59. 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/QZWFW2464272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133f3d7669115c38785bd22d93cd55f7d275c0637daf652fcb9b763bb239d8e0. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZWFS2447442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1629b67f6a9784248574c1a31779e43db9abd94e3b3d5b05ff0f7eed4fd8a9d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFS2447443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34e6f7d2eced27dea4440fbadd4ea8fd83bc10503849a52531c34ef73f2afd1. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZWFW2464273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76608adfb6862b2d0f3dee6c3992c583a3bc8f089cbd679f5b9bb5877fbfd84. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZDA62557489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa686b9da94cb520fd3137053b8c739e4a1af30ce7d3327e39fc61e252ad43ccc. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZHN62557785.