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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164cce555b395f9e531a3a82aa3ad162c46b0b92c11b1b2ed36baa7b9a055d33. 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/2042f9d7-8d29-44e0-9f3b-609d82b5c774.json and https://artists.proofprofile.net/proofs/artist/2042f9d7-8d29-44e0-9f3b-609d82b5c774.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1499b43e19f7b7f244732844ae49c0838a17794662c96718115111bc38bd90. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/PLI361239341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b440fc23056067239a9b726e706f050f8740af1d17522426412aed4c0c3d21. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLI364062410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b1b2b0dcf0521c279adcdf3912e364b75d786cb6feefd29d9cf1951e6f6575. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLI363378880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0e023f077ff6d1d7ae70d9d0e2a9e943273d88b639ea1952c80631b86b15c2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLI365056690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4546a643d17b5a22ed64c28213823d49f9ece4d396bce790755c3f21a85ab4. 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/PLI362265330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d81e770f0b8e50880a5f834cbfb65ac73ab0bfee89ec6efe5fe3a721c0f937. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLI367164340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c5cd0ff23f1facb04394ae1e517e92da1ed469dfe1b8625ecfd8795e1a5c00. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLC062422280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1e1c7f70f2aae5b8daf3cac6142eb75dbff0e87573ffb32b4b2eaee21ad47f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLI369071200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178585ac1f15696d4e988b6db84e0d342b2a6d10aac5d2411cbcd59fe19e58f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLI366436121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbc0d73f226cc1e9d18fe1d269627c518a8a71ef69b327978ca076234ded6c2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLI368153270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f427e3da1907fad2bd25c2813507d05fbc54c3e2c3d7c1be0b48be275fab4a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLI368153290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffa57226ac227f5eb03b8261ff50100a8cba454dcc168d040171fbd11642282. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI366878321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a19eff4cf9f509efded1889b5a0a0763b76ea52cdb5aec225c694d767295fa2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLI362842050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1e1c7f70f2aae5b8daf3cac6142eb75dbff0e87573ffb32b4b2eaee21ad47f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLI369071200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89668c85bca45f9f61e0e382f042ef579847a49cb678f499a2bf6c04b2a2d975. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI362842080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda46522ce198dd6249a8932a9f18873e6dd44bed98beb982e907ad8f958e2cc6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLI360622010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262753396645dc3ac11248de2b7d826084d2cc0a7c9fff9554e729fb7b3ac4b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLI362842130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5acc4b61daba75061be9a132f78ce1732aacc0fd661907f4c0b0f18e5d0de47. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLI362842140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4224b37f3ef6b3d7a46fc81c6af48921f4a3b378cff96748744c5e3ad2aa5b0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA82441833.