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 0xbe7dd7a797a0ec92ac0f1a4e5ba90194883ae903781919b1a16f732957639aa0. 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/5e19167a-2535-4e15-9692-05e1fe19f8cf.json and https://artists.proofprofile.net/proofs/artist/5e19167a-2535-4e15-9692-05e1fe19f8cf.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 0xa3056dd514b2a1942e60ea35bb3ca7f09d47bd77724e735c4da068dd3a2c6d26. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPJ591700547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd193dcd5d5b2c16fd65599d7a87239ae9442388b2a1d262321e3cb872a81e06a. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/JPJ591700550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e38936cb7ebbb8ea1a80a3c1ee778132f7341b2a7bf36411155e0d8c4e145e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPJ591700552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba31f5b72d073a14891750a6418c5fc5e54efbc780a04153514d1720b22fb5c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPT251800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149bbe4ca56ac42381730d9dc273b4176ccc87bc2add74f1b9c697990ab125b8. 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/JPG101900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a80791970bb63cf6f3cea156665439156ae97b37f4272cb0810c93879eeca. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/JPG101900312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae74181841601b3766ea81d286aa2749c56b11251f841efe4a38af7dd38bc20c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPG101900315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbb2822db7fee8ab6de713dead3a4df577c07b5555330c6990327af58f708be. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPG101900320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55911eb9bacfc41894d198d4756cedd9301b1fa2a651064ccbb5319c504928b8. 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/JPG102201681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f7c1f7ec79986aa836aab34057efbe3cb169220bf80fa2cb4296dad87f828f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPG102201682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30738aff90736f4fd0d672f5feec6b5a1c6083f1403e9f808119617e40ce4287. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPG102300949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4f6ce360782b91468589d6fe7ca6e5543bba008f7a881181bd219ea912d21b. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/JPG102300951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90cf22b57b4a84dc3d88b9c3f4276bc755a4f100896354b890f8b88f2539c2e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPG102401898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f146bceb2a23f2fdfd0f8959b161da1daaf21b3181e0f9fc18dfe32ebe8c720. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/JPG102401899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9272cf4a7e9405b855cd34d9db300f3925b04f6f4ac64bfc46df34ae777e3084. 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/JPG102401900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3008d40a3765a70576c567d6d59751af41b62e0d9102e4c436d8b29466c9d732. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/JPG102401901.