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 0xf9bcee801802f27842cb1fe116ef0d9a0eea746b2dd22b0f75540efe365bf931. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d35dde29-0e18-4291-99fd-77f5444d4c8f.json and https://artists.proofprofile.net/proofs/artist/d35dde29-0e18-4291-99fd-77f5444d4c8f.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 0x497b99f760c71c5b09ee7b5f1c14e24335f08436efe19b9465f1dd0667ce5c9a. 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/PLI862300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d623bcf8f2c28c5a711c2ad3de37ab6c5bca1803ca19f1551fba3bdff26437. 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/PLF242413540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6192135dd817d4f16e15d3f40b1022e2ebed59a3e0bf81fe500a1d92ad760ae2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/PLI862300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba788ad817508efaee64c749ea1b03b388dba0d8558d7f33314cdb872465e98. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/PLI862300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68def14f369c09a264b136bb95cf6f2e741e612f98ae0cd8ba245ce10bfa6b33. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PLI862300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bfa41eea8c9e56ab8aac3a2fd5fd0ede5a3af32f26e5c632daa3d7f526ac2d. 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/PLI862300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bbb6f3f2ed604b24611b3cacf5551943cabae54e9b9726e4adffe381842032. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLI862300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef32bb3d5e188bd68ec89b7890c9a5fd89edce3958fe1b24efd0a5dfd0087cda. 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/PLI862300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf61bf11a4e79ef6f84d0983eaf38b63aefbb865a73328079066fea5989ccc9. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PLI862300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09476c1fb19884ea28a1ebe825a3efb904ce97e7d654b14058fb2cf97671810. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/PLI862300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c22b5e419574d9d5d3097e212256c89b97586bfe1954a4f9bde8658886f0e9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/PLI862300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb543fc518d7eb5042181fa2bb88aad594ac2c646b43e47499e075fde8c2dd2f1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/PLI862300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef32bb3d5e188bd68ec89b7890c9a5fd89edce3958fe1b24efd0a5dfd0087cda. 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/PLI862300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2adf12ed1b99f8f1fa8987516fa8a2d4488ea37fc8b9d9a526e7378ffd48bb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX452119764.