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 0xa79d31435a7aa12cdde6a4b3614634ccaca26305c7bf87308d31106cd35a6461. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa1dd2a4-ab81-4ee3-a1c9-744a406c1866.json and https://artists.proofprofile.net/proofs/artist/aa1dd2a4-ab81-4ee3-a1c9-744a406c1866.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 0xb8b62b4a94f026137aabc9dcb260fd15e62d77379539030de7521b7e0360d600. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU2175222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddbd7ba9554849b62fd5a8717d8d3469d034f5c52feead3afb0c1e0b7d755a0. 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/GBKQU2175224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f596ac3e18d00e89d846a263a2c7689241810f4c1aaf62084a8b2cbde86378. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42545520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16df4897ee15e525a48a1f03cbb8d2d54d7f6ba688c8ae65b6cad2f4fe7673fb. 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/QZES62563162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e2fc06bc73049ac58c19b278673b79432e2c8bcc18bf9905c906d561b6a176. 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/UKZGC2501178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976f8b0de663ca1976238d8d867b4c2ea6b97b3c34231f00aedd3ebce3234cd6. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/UKZGC2501179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cdbb26feae7999214154f416235d11c4e1120977cfc3088851ffff2e1a62b3. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/UKZGC2501180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be4e50eb6ff160d2ebf78678613f9f08bdd4126bb81c4e6ce8005549307b271. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/UKZGC2501181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b57c3dc71e4e0efe136a12b28de738b96b19db29a9a91726c9e744d258a1771. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKZGC2501182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c480536b440c17893d35f49a11dd08f6315a7afcbeb7ae65163ab891fe3a9e7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:48:54Z), 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/UKZGC2501183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ce4daa85e62e9b306fbe84ecd18d97b69dd84b0450d15353bfc781ae981da4. 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/UKZGC2501184.