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 0x2186ed02be7dd82ae24c79d6abed402075106eb2a6980a37c0d73dee01a93751. 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/d87a4616-a456-4305-ae54-442afe8bb028.json and https://artists.proofprofile.net/proofs/artist/d87a4616-a456-4305-ae54-442afe8bb028.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 0x301b9fe84e5e2ac6da3270469bf9e8ca6fa5a147109085fd87e8e60a2f24de55. 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/USHM92087467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bbc03f94fa81babc1d3574d376cc811c6b9c6104c4eaf0cf24660bacf09bb3. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZMEQ2126594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b55138fe54dcc6cc03d65d81caa65347b3985c99f255e926c701a025f74d32. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:43:07Z), 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/QM3DF2280617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79403ace92f5d062a0df696a3489361345d9d136118446b5e6199e7d52d3f07d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ42454313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cb7d6e453d27ae17c2cb31d6cb1562a07e241c4a13b7a69f20d5f922271665. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES72496673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2584c44c655e85725354195363276a3052d625958f5858c11c746e86362285b. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:58:17Z), 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/QZPLR2428915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b1606001f0f06e95af1828270afd13009c7974aeeda58b0fb2faf32c10561f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:56Z), 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/QZPLR2428917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b74ce02fa8f0b3179838c0cf113e64ae34c920eec4093948726944093de3ee. 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/USL4R2349280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf284e8b18722046914d6f193e563a5040fbec9e06cf8f18ddd363c4302f856c4. 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/USL4R2349281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62d1674b2979ef9758fe64d129b372a82a2ad4dd4f741dae523ff0d88dee669. 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/QZK6H2395320.