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 0xa289ec4663c1aef5cef5e7fb4034cdf2bb4f85890995771c1848ba3e5679dc00. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f952b9b2-8efd-427f-9c3d-efede393d8e3.json and https://artists.proofprofile.net/proofs/artist/f952b9b2-8efd-427f-9c3d-efede393d8e3.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 0x33115d23bfaff0ea5d1ca71fd7c62bc16ba8a5b2e0d35144710ed3562b1a2596. 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/FIAAZ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a264faaa905e1597bdb727306fcd87eb59c50f9b37ecd2f2fca6d58b485416b. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FIAAZ2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91b52a35a6f37be5d81341222fa05803c8544c6018fc1f9c3088028abc1271d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:50:53Z), 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/FIAAZ2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753b255a7383b04c0ccd8d7b4cb7f1f268bf9f31f44c80346faed4872aca0504. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FIAAZ2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be46c9101b6d1177e580cc1d2993ce13bc418e62de83c84566aa091559dba47. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/FIAAZ2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa725442457f522678f718088ac2179b4ec440ac6945e0116f0458028f88d00. 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/FIAAZ2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2e0cf11ab4f7f7b21e4e9f5f4710ea661113e4d3fcc317267c5a57d7fc11ff. 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/FIAAZ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1708d0262fb6963ff8296e16617b55bd3d8fcbb3593ea19fa075a5f511005f9b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FIAAZ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13fe5defda47600ad8a8a8a49da9b43cdda7e81ca7bc81bf9f7e95bb3dd9651. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FIAAZ2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd211c4a2bf91fe14cfd6d5742fb22b38f824a5adb3ac1fa52c4cdc24d46ed26f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FIAAZ2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ef83850d57220b9a75f3a9c2fe0ddd07a56449ad2faca027665cfd11d9265f. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:08:11Z), 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/FIA822300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6e05825f447dbc8abec0e3f8796e9932ffa0c075062d92e54793cd5051dced. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:57:50Z), 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/FIA822400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d787175b87bdecf3f58c99757bbdf92f8546446c6bdfb6b03118ffb5ad08abd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FIA822400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78467122c48bf74b2f7232bf544a0d287c7fcaf48d9853e109eb2018bb3dff8a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:40:08Z), 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/FIA822400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a52f52fb423cbc0fee87f8a3fd87d3cb6bee4d78bceb4a0f4c4d1ea1bd5701. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FIA822400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe601879806f8776b352db6efb2bc6fdb2466c3bb903881fa55a173a2e8ab36b3. 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/FIA822400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ef83850d57220b9a75f3a9c2fe0ddd07a56449ad2faca027665cfd11d9265f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FIA822300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a1cb6d2823179b75317c02fbfb91b7c8eaf41b0c8f3a9242d34b36349e9c95. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:13Z), 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/FIA822400015.