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 0x286aa7289fd50345a5b79e0a2adacc04aff4bc8c6575ab13a4c64ceca09436c0. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc350b25-34d5-4851-a361-12f23523f7aa.json and https://artists.proofprofile.net/proofs/artist/bc350b25-34d5-4851-a361-12f23523f7aa.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 0xb43341a67dfd6be2104b64a8e6b799e53547d74df1027f19ed8443d44a70b8fc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:56:20Z), 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/SEYOK1774808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca4e1f791199021c51a3fd0f4ec3d7c61669918d40f642c115bdb35f76be241. 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/SEYOK1774809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae2dccb675ef62d6643bc14b9cafadf49252a83936eca7fe223cf7f497cbc8b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEYOK1774810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4d1de9c2687332fa081851542876bdad502def583cbd78f3ca31809e6c0a73. 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/SEYOK1774811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd589734a6fee709011d13f337f48ea3a85c9ef2ed85659a9f6fea3e6a60b29a8. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZES52146593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4137a91bc83cfd76ef9028e6c4b04b0743bdfbe81362c85be77529e039f92c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHNA2266981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773e48c23c1f8e537512f7f0f1381445b09ed50b8f3cd2b06b6bcd73a67bc832. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBMA22435005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7904af4d978232cfc8ca3f61eea40d9eb449dc284e769bdda24dda3b9eb44bb6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:23Z), 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/UKXN22516410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d3116ea886c412482518da34e28fa0f79187b8d9cb3cb1b16e73f901718c19. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBLFP2509254.