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 0x9983e7d19f1165355c569580749874bb2275367e21e06f40e5bbe3d6dafdb9b4. 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/add2e3ce-a9b1-4bdd-94e5-8e527d5b80a4.json and https://artists.proofprofile.net/proofs/artist/add2e3ce-a9b1-4bdd-94e5-8e527d5b80a4.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 0x9c2b2bff1e24eea35ae3d02e8e408ed80d1a72c599d4850896ec1df9a597b986. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAX2367125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7877459335c949c9e88dbee971c655a304fbb6239e8efec545772521d5feeca. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTAX2367126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa306b346c456f74f2f49932428592a27a36fce56f02d52e3ff4f00d9b2cf2baf. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:16:31Z), 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/QZTAX2367127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebcbf28f27707a8811527e7d40f5d8b6a174cd18c9e685c324674ae4006ac30. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZTB42379917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c810a7e9d0b2fe4aa25e862cfe4e2106b068ab224e9dc1133a3af216d4f333. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZK6K2452866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81df108b534251624f9da2c57675bb6e5ec08e78751334922dd135f978897597. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USANG2408539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9d6477435f06789dfc6e01436ffb84a208360f7a74ddf5073b38bd70583404. 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/QZTBB2424723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891ada57ebec2c946bc5ae2d012d964e3848e0c7ccdbdaae602b89d83d3ea1b4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/US3DF2531864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d5d8097b3a1427ee4163ed9e8d586379affcac65da69560fb689bff4881720. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:57Z), 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/US3DF2550445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05037fcd2f70548144a889d36348923a0353147658d73bfd10d9375c4fb17799. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/US3DF2585439.