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 0x1059ecca8439bb6a9c5abe5e9ed8a2ec8a02b71e251f0aef7a7379e60f3030d0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a80403ee-b202-47d6-bfa0-ec7e4ae88cbc.json and https://artists.proofprofile.net/proofs/artist/a80403ee-b202-47d6-bfa0-ec7e4ae88cbc.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 0xdd30ea776fddfacaabb3f5c3788fb310555652320ee8c23290ac3c6db197c4f6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA41938840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb83d4e87beb90961b41df098a2aff3fd5429301bbdc255a25ec8b7a058a14d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR59R2206307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a49c726893a8dca3a2cfe88287e1ee55bceda69bdc6f1db299d22788ef2f297. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR59R2206290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4c958c7d17a9abd7b7bbafaa7ea1f9547a0bb4df8f830f2b0b93c25f5ce07c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/VNA0M1914155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7195554aa4c16b4119f3210e1126c87a24110e4408a8c2d6ccb14db29bfbf9d3. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:44:51Z), 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/VNA0M1914302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82bb80fb3b07063a1eb645f97fed092609e9402f5c27b21f01cf23807b8bcfd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR10S2212087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ba24e117482a6343caf87133e14252bf9f4a0e0e5ba1c543ec681e784c0e6a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR10S2272122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec6ed740c00098e41a7ead71f535ce19ef712a87ad15d4fd81cff6f6c975c18. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX872238947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d228f587b7a635c4b4412c4a4554bd29d68b86dca6b4c4d022b8a62301cd766. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:07Z), 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/FR2X42341414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9189b27eb381d12c0e39708eb6ca73e7805debcfeabd91ff611adac434ce1926. 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/DGA092395710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3a2dd178969f367edc667881120215288bba53a558091bf8f1c720a874692d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FRX452525466.