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 0xdac7ab4a40ab03c3a6aadecc3b9525aaeb234a4eb2aa63bbf370bb059154e3bf. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42f32adb-e305-4d20-b501-31027fcc1b4b.json and https://artists.proofprofile.net/proofs/artist/42f32adb-e305-4d20-b501-31027fcc1b4b.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 0xe87376195ab45f0476c176c92b9180b2e420d08a625a7f0445c24d39e735340c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMER2146691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eb7118a3ea0084bcd871cdf74d048794bc4ed7ae67c24b385b7087964288ca. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN32224563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f326106b142e07c6e214c75b4e9f2de64ad1b06d5165e615cc49964511e2bed. 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/QZK6H2268331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65267ad56afa058eb5b31605d83fe1998ff495042f00d27653d9b77dfeea0697. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN72391757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cf45465f285659eea16aaead2513bff0c12643b0956be55926007afdc694a6. 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/QZDA72462319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9932d1dc616ca1a10dd0c3524db6008438f396e0cbfa3fc0dd88077b051475b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:51:29Z), 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/QZYFZ2406311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828d371a4b0390e45a4c09de17f3d72e1913bc88079399b47887d988e897251f. 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/QZWFQ2466644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4af48020f98937a2c93fceb67276ea0ed58497c2fb7f2bb13dae3d1d64e485. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:29Z), 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/QZFYZ2527691.