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 0xfb47cc38be9e3af5a092b8e8130bb35ed3f038d83271e41098df78fcf1deebf0. 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/e6e80a50-1ce2-447f-82eb-e2327822a20f.json and https://artists.proofprofile.net/proofs/artist/e6e80a50-1ce2-447f-82eb-e2327822a20f.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 0x4597b3edaf13a3883d2930becd9e4e7de7e2de8623ee3a64ff58ba3d7b87dda3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB22359142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e27b11e038e5e5d508ce5d59ecb385f7bcf0bb8e9b045ed93830f76249470c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:11Z), 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/QZTBB2305234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109c58194648670589816e2695d7d7927958b96175250e7d490cd75df62999a7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN92438927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07a91c06d4485f330b50d4e709e4d930a750de09d651436a9bc5264576deb01. 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/QZMEM2477091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6da04d431ac00bd96bc2b1d99bc1d451e1dfc0a2fe2992b3f56bb2af0b5fb7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZNWU2446827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cf755c50cd18b64add49786444b2698aeb3d96c918904313b23c80ad99d98c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:09:50Z), 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/QZTB52478913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d536aa4d027a38dbc89f3645cbb243fbd3b7b91c659f6d83c4adb1e1eeae3f5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB52478915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d2cdbf63bcaf8b88585cd6910382dcc5dc33d71b77a63a296cba9cb71351a0. 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/QZTB52478917.