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 0x21a4f94fcc07de67345dbe55cb3d3829821e6c78aaa620557300bc9daddb91cd. 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/732d6a7f-6397-4990-bbf2-1df3b146b4d8.json and https://artists.proofprofile.net/proofs/artist/732d6a7f-6397-4990-bbf2-1df3b146b4d8.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 0x167d5278b0ff2022b4098ecbaa1463b1073436f0d08e62703ae2af2474feb109. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZTV32342266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e3096c7ea99bbdf0b657fa5b6fc981dfe8d8480271f7157abe9632131c8e55. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:12Z), 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/QZTV32342267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3df6bd5fd4e84ef5c4924b2ba533c4a41ce86b45693ef73df1098ced44cd96b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTV32342268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e70347ba1fc98b2f89c86c9ac0465570d0f50a5b28382ab2def883133bf6d3. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZTV32342269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46211b595d19e779bbfa4cbe0b85dbaed690658cc491b8580bf2fb2a117e936e. 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/QZTV32342272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96faed7fac76eca3a44a7e5ebbcd0641e901433b84e34a710af9b3277aa8d6c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTV32342273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f5d022c4aa4ed24afc41b3c2c49b50ebfface64fc54d27133afb7bd7bf8f17. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZTV32342275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7894d52ecd3f7b37401ec1ba89db95dce2124a9682d30837dbcce90df4f13d1a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTV32342276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090210ae531405b1f470e0129003364a1c238001c96718a9c7998aeda2983bc0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:41:48Z), 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/QZTV32342277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2b5c07e2c5a831e41acac92d58f69b2eadb2e074f09a53ddb55770c65ad372. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTV32342279.