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 0x3967823e2da30336e4ead40ae409725d04f0d147e7a0bc24813c0e06ef4c18f7. 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/e09d3197-a2c4-4d7e-bf54-5f632afeede5.json and https://artists.proofprofile.net/proofs/artist/e09d3197-a2c4-4d7e-bf54-5f632afeede5.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 0x3065a91cb31d41185001a70ab14780f7ed6e35fd1046bdfcda98a915293385a7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US3DF1977692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dd1ffc91cfb9e0bf081b1966ab46d4dc8c1d5bed7df048a6268bccd882b07e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US3DF1987216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928c3c57251d5de7fc922b86ebaccccbcfab8375bfce9807d23ae18d1bf225ae. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US3DF1992943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589d02f9d58fc1e78e6027379f422f512ad6d5ebdf84f60db0d1227ec0c78b3a. 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/USANG1921997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87b314d5c6b7a7352ef71bd57e285cf5e4848c5dee85cc326f327562379b5c3. 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/USANG2007903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2b968bf4ff5e13476b652b9c2e6f512b5092899fe596758716a81c786e15af. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US3DF2120295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6203a1f4ff481cf6cc7e800c7167559a4de43049068f6d51ad9f76fa72b45739. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM3DF2158940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c335112ca771b375ceba1873bf5872f107068589e9160fc979442909507089. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QM3DF2191393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ee3d6d51e418f02f117e038ebf9a6903df2b6e92e45b5110ec42132ee16301. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US3DF2215853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceba9070fd59facfba5cff00e03594bfcb84e926da544620a8711b6f79b627d. 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/US3DF2262083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2589e98cb9a0cfe8b72299b30a9e67123971487ff3591e72cd23dac71819d0bb. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/USANG2262960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66a88ebae9b527a3d7a80d08dd096771181302e7086c63410ab2067434a167d. 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/QM3DF2205890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270ed8ad81caf5fcb6fd68dfcd513dfaf0a02c7171cd32d4a017a9a0b5b016a2. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QMANG2217553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a6dba4abad7dcc37f863e82c8c35fa6edae9abc39583c6fe343e1e0ab3622. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3DF2485338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efbb7eb965999d0252bd6518894951237480c8710f102e43e365abc541add7b. 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/USANG2407759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b450f7da6ffde24b231fc15bf23d444998a880350a20f35a69a153a05a3d698. 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/USANG2413223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10872b944ff8b6f2324cf20bf59313e555aae8e890265a769cd14dc41d0590e9. 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/USANG2459592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053ae536ad20055f3389be7749634b74d06764509fc03018f90db37a6604d2d3. 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/DGA0R2463759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0da143aa207500845c002d2c1329493a80ec2bc722060ba952b98242dcecdd0. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USANG2411720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dd2d19980edc36ed537b1215150a6240b716de0ef8b973cf1b0ce78efe4cb7. 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/US3DF2469325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428a93020a1f10a6a1944877021b6b3031d18f33ec58228021a48de844e42190. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USANG2079086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9b54e058d06f8f2e2c62552e4ca04d6872117dc421ebae4e803433ab710518. 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/US3DF2236103.