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 0xd6434d184b293530e02362f6c60742b494b2f7a286555ad5aded4212417b5f97. 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/cd1eeef0-ebb1-428b-b21d-8fbc9ac5b251.json and https://artists.proofprofile.net/proofs/artist/cd1eeef0-ebb1-428b-b21d-8fbc9ac5b251.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 0x4e48ff4012d32ca29e7d36c0ec5e02e9b1489a4ec08699478db05c7bbb56a057. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZFZ62081567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bcb83d4fd40fc7de848df32fa729087efe3ae5aac4b03b7a05160e32b6624e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN72020491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94d1314c7b94418d0717c96bd99bb0f95051b2c97c1f051248a8d010ac3418b. 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/QZK6L2032351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0bc81e7fc3e56eb5926632ecc50684c74a5e338a30f893cb934bc0c4cfb0a2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZK6L2032349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69162c3e5cac995a999b4258fac0eafa474826c107b589312de2e0507e4a108. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZK6L2032350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd5965a5318f62e31f4fb36d137b2424d6ba31040f4fd49d39980700920f6c5. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:46:21Z), 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/QZK6L2032352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff6d4b436d7d02d387ec3a89734285a29b124698f78874a4474a5e94385872c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:34:31Z), 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/QZNWX2009894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941c6470c208762508c9965cfa0aa36681f6667ddff8779a01a0d556d6f56228. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZRP42131258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7498f7ce0e0bcbca84f6911b92d3b2574f20c4eddc4fcbb604025e75a6844ef4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZRP42138677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51c49d8d8fe23806547f6a67f5c56ff479019399c9ed6bddf5cd160e4dcc0c8. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZRP52487275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a96ec45ecc4ac9f7a7bbe354e115d56e0320bb583ac428aeaf2e1a3b8fbb6f2. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZRP52487276.