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 0x51fa954f25a22da8ce476632d97506e86158533f16bd26a2b237d20e4f9cf3f1. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/180117cc-97b7-47f7-adc4-8268f8af05e3.json and https://artists.proofprofile.net/proofs/artist/180117cc-97b7-47f7-adc4-8268f8af05e3.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 0x948abf79d18fea60a6610440ec66e45f69987fa35b2cb39082951ccea8c2db3b. 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/QZZ782500551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b07b9ce849158c36d879318385f51f5e50cbd6450a6e00e410d03eeb0a7216b. 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/QZZ772591856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbe356a6bc4b94e48a8654d6a1a71216e049eeb5cf0669c81a470b4cedcaf9c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ7K2501848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67761354dfd3bba991cce21ae09d7b42945c872010963f65ad2f313962adeb04. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7M2507025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaa45406f4eb4cae74bafbb34512d2c9f57a042bb32a0a8d9d79e5b14b9a11b. 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/QZZ7M2515692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb60cd2d92b4982ba8bf91f777c4d164097d07ef5be43306e6b4f60182200a4. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZZ7P2585916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9855294552e9605d4744b5af76f2134b06a1128479d2d0fc1bbb83d91291fe. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:18Z), 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/QZZ7P2526578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd7bd26885b217306e3c79e15bb54e179612b725e528f05799b2b71d2c5257f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:24:21Z), 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/QZZ7P2526592.