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 0xbe97d1f0cd4f510dc1ad841446a974c3a9fba84350ae999eeade905ebaf6f31b. 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/baa1c858-6079-4e37-831a-777b05fe4095.json and https://artists.proofprofile.net/proofs/artist/baa1c858-6079-4e37-831a-777b05fe4095.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 0x4d123e52743895fadff30efe0bb71f455983e440ba9ad16a1cc85077a3e2c60e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB82245208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45df499627146ca6159ceb8c6b9a908cf04a973522c4c97abf5c11291df8b50a. 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/QZTB82245210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3636648a8f76b6bbf71074c8cc047155d4eaade2921b04de10d596f223fee4. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:30:46Z), 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/QZTB82245217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfd5a24833e4caca1baa491730b4f739fb36052ba4a9009ed96128f89e49a07. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN72310118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b387141b59e13dd78b10e191bd0c90c1e2361b537dd6461226be43f5f5ec180. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:14Z), 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/QZHN92379675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac387d49e325bf8aaaedd5a96f003a47dab1682cccd3d52d6a7f73a11ad9bd06. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZK6G2396903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe783e879266171e52429d052c97b7b1515c47cd2af9b3445d0e7087ce9d4b813. 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/QMEU32502066.