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 0x5bf42aef1ea90df88de3f2c4521b8dde1aba7fed1ed3e00562b9dbb382a90c19. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb00812f-46af-44ee-abde-2e2f6814c23a.json and https://artists.proofprofile.net/proofs/artist/fb00812f-46af-44ee-abde-2e2f6814c23a.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 0xf19f7238be7a132fad407b9a8601f50f1dfa280b76ff77dd2a90e241a0fa6d23. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBVCE2315102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb6ca3b28ced3a8449d4664648ecebd4725f269b47587bfa2075c895a964400. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBVCE2315104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f254e6ee0497bdc652af44bf5e2bb96f08aecd9da70cc6071a2c1b28f5f539. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBVCE2315107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa702641d8b1bd0809448aa5401662e91a3db4cf37fdd16f3173f4185927fc9d3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBVCE2315108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1305eb9bab00b4ef1bee366c6e796eb880415d8a00c4cb32a847d2157cadca9a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBVCE2315110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2996801b4db0aae899e884e904cc2a83c3569ea5443bbe10b7b3845a3cc5a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBVCE2315112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cd30db1b0cae3e7655b8912f82d2d8b46dbca5da07aa96145df51de6154953. 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/GBVCE2517301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83db58b64887c92a99e7668b196039a6a42f269014d7a9d091da6ded664ac195. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBVCE2517302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7678d8c7ecaa95d065c41d77d88a2f90d0d605fb1323736edc0bb54ef9879273. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBVCE2517303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1a288cb86bbfe2d8070ceb78eced3f91fd20e13ec59c72027e0c6cca1f6679. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBVCE2517306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdee124a601ddc5c58f031950f19bd5be528cb84fa238560712369934b34bf80. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBVCE2517307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd1cd16caa5dcc14421fedf39dc262185960211ecef3a29571cfbd2fe65c045. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBVCE2517308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050947698d7dc51495ff9a268cfff1ac1ef7fe9349f5af895cad9fd30242f4eb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBVCE2517310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6111135bb676db27802201c129ff728e4debe3c5ab9bca300d8f6b4376529a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBVCE2517311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdee124a601ddc5c58f031950f19bd5be528cb84fa238560712369934b34bf80. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBVCE2517307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83db58b64887c92a99e7668b196039a6a42f269014d7a9d091da6ded664ac195. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBVCE2517302.