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 0xac55c6d3114076a356af965c8a28f5cfd20966f8368535938ee55bde4a11eafb. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d223725-0dfc-4b39-86b3-be5a0b9b618f.json and https://artists.proofprofile.net/proofs/artist/6d223725-0dfc-4b39-86b3-be5a0b9b618f.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 0xdd717fd10d48778ad45c1db3f3a2a89c68b8040348802f53cbf73e0bd6e88d36. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWS2447519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf895b2bea56dbd9d7fb37b0dc19efc0b65b251b4fb26249e12a8dc1a57edba79. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWS2447521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5a49b505f7cace961ac0057603b56e8d7f24a7d7d6a7862e7767062695cc8f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZNWS2447523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0472a9ba4e6386251c5a8fd1598a962478690a60943d7d8c834589164465892. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWS2447524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0784ad4eaf01fb6eda49aa763c6eb1b6564a3312fea2df753e7e7a5ce461a865. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWS2447527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20753fc1742fd8065fb385d62afc1920edf0fb7b0f9c19d771e21f6b4278ee0a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWS2447528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223f8858dd97b55e5c25f1581e847f9cb47f9ccb2418925d18841465d8743e15. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:21:50Z), 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/QZNWS2447530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a810f8b221c8c76142623261e8059d2487cd33a7eec7f2e9a9f30d90ddddbac. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNWS2447532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fe513ec53058af9d435493f76a55cef6b6591fd31a7614779f8dbadf6da37f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFG2426848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63df08908844e74cb27ad14233e203e51f0e31966529efffc465a7bfd372466. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USLD91773368.