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 0xd22c58f62e0ac94cc81bcdaf923aee944e054709d4072b8285a2a0c44611f136. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1c76959-8833-47aa-88c2-2e58b33c2c8c.json and https://artists.proofprofile.net/proofs/artist/f1c76959-8833-47aa-88c2-2e58b33c2c8c.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 0x8bdc7258463c644078280a846f0d61e68ff3d8a75ebc618c78d75866aa7b21a9. 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/CH6540875385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d32452992519f8eefb0e5c9ca09defbdd063572224e648b55b17ed1e907eee. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/CH6540875386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae92a8e28f44b1a4bd6368e5984886c1c031987f4aa7b28c7b46c40224542099. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CH6540875389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dc29284000585188de983e10e2874224c0b8e3490e8cf089bc53754cad5876. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CH6540875391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c31dec7c7975d632154e204b9e5b4cf2946d64203664aed5cb6d0f02d7614b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CH6540875394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4976566b475779d034efd6c5faae3e9da2f5a152d9ad4dc42a7616efcfa240c7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:09Z), 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/CH6540872992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e820779b34ac6e246f2544755f09f4b95d2145c63eef4bfb1e241616c610d2c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:55:01Z), 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/CH6540872994.