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 0x701ea9686102e0692bd794cec39642de2ff481ab6362c14a0fb063a0931554ba. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3289817-5165-4bbf-a53a-9147970af418.json and https://artists.proofprofile.net/proofs/artist/c3289817-5165-4bbf-a53a-9147970af418.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 0xe9c6764a3a48e1d9fd6b1981a1bebc9a2c95f6aa431df2b0c632dcc2cf68b84b. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:54:14Z), 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/BR6TM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f74fc680fd4f17c703e2db3b6d8dd5ed9df6df284f7918a3004b2db475b7be. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BR6TM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec2261ba7b0603b867b1cb0f15807dae82c0627941a5d03e2d73932f826c8e5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BR6TM2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98d6703d8a0dd7dfbfef838be9fb9809afb127f6471e0a4cccb96c428498eea. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BR6TM2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895e1accd36f0e978b140a41e544742221eac8c440d687a9f0c2b938a056b1bd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BR6TM2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed96d5500e615260f8c07a0e337a89c42c0fd1429ba767b87658dafe2f19bd99. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:41:43Z), 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/BR6TM2400003.