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 0x1903a95a695613b2789cf7dcf507cd0067f7629c297db96c6bda58e4637720c3. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebeb6128-2266-4fd1-acec-d3f09c01680e.json and https://artists.proofprofile.net/proofs/artist/ebeb6128-2266-4fd1-acec-d3f09c01680e.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 0xf1173c766f67ee8dd41c04d45731c0ff926cca423de287103fd9294e5aa3a989. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:30Z), 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/QZPYN2380687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5c080e72f73a7a112b92dceedea151efeec1c8df80e217b00e60dfb29d806d. 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/QZPYN2380688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc554703099fbf66c684c3448fdb09fe8d661a8ef978bc5b35483f77d47d35937. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZPYN2380689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88466b693f2eebf8cea9a1c18eefce879498d0b644d67b956ebc86719a617dbb. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:46Z), 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/QZPYN2380690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a227b0a44deb8e01a4dda0c46df99ede09ebaa8d714bb780c17725be71883b8. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZPYN2380694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227b5165d4fd168914cdeb5aeb9ed46893852f3f2afc924fc1d931a4c417f350. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPYN2380618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49cfaaf0c7f12aee8e009b9bd31edde4de0d7406589d5efa37287f11b60385c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:40:21Z), 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/QZPYN2380619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90359914cd0a102da3530f37237ca7f9da838160ef3178f524f23f4f689ee365. 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/QZPYN2380620.