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 0x736d2ed3dc9ca75fa81c1404e21c56138700a23596e21ef1170113f83a31a9a2. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a32fcd0c-8070-494e-81bb-85d1eab915ed.json and https://artists.proofprofile.net/proofs/artist/a32fcd0c-8070-494e-81bb-85d1eab915ed.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 0xd75ddb38b55656e6ab998a8d8ee35b526aa933575fd8e4d05e56527ad2097688. 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/QZTV32396590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc445dfb12e7932f6d56e8e0b6114069ffe938d4309852c37f83ca2537fa5c304. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZTV32396587.
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 0xdbf6aadac3dc5a4ad27a4d28a45137601f1a3cb342b62c4dcb663a677095442d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZTV32396589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcff862dddfa627aadba56ad37a8d8e1dfbf5f84522f9eb2c877d4dce2cad5f0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZKWA2003762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf546bafbe9d40aa4e52ef812135956ecef3edb52425da5eddd346e06955ae3bd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZKWA2003771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5254367de6abbe7aea7a9087400aa31909d0d9ed73b897bdf87e942dca8c5a1. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZKWA2003765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9475550d4638e62a8e8bcfdc43132d577b773721aba4494dcd48640510b7bc96. 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/QZKWA2003761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd68f137057f1c85f315d3ed4a9c1351a6fa6694b01690e846bc15b32ac4d5b5. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZKWA2003763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6020acc457c80c52dd8f5c48bcb34345d973d42c1c21fca84678ce40f5f63fd2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZKWA2003764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd2f36144d955bf48e7aaa40d9e6a5f25176b7f8f1a6ae685711493569ede6e. 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/USA2P1933168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070618089431ceb0829b0807b290fab3aaeee25437f1bffdbecf652885d3ef12. 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/USA2P1933174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb76a9b7907c3c41755bcea8bdbd92648f717819a831b8b234710a611b0cdf3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P1933175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e3f1e5397410bf6fede999895800cea4b0bf82db2267ec553675525f70c94a. 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/USA2P1933181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5233d7075bc8f178801e6ea8b346031a9888e9288bba58333c0a9b0387bf55. 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/USA2P1913675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf863d677a24c42b551859701d7c3124a04912d89c7ad0ad97ee19371043db1. 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/USA2P1913677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f76eeff5e5a6b76af2afcc02eb1692e8d6ddb2665c3dc5843284909fa57379. 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/USA2P1913691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c32dc246efde7ea7f4a6a31d57d907ef5fa54b057cdc5cc010ab86f998fb5e7. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USA2P1913681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f2c26df8f131936e7506bbf0d6f2f84eee2b1312df9c23359c0852efafb548. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USA2P1913676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826b43e6c3a6738310a10bb69d19e0d3ca1e59a954f69a8c5b4d12523e68a206. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USA2P1913678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a484d1a1cfdd293f996b065422f5cfa57155b685d39421a7cbf4338204187. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USA2P1913680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40e7116fa6621465d2644243f687ee61879620371f81e710d097323717d48ce. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/USA2P1913687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88d27f7f7d78016c766e97adf1b5fdedc1efae9babacd25497231dba0040a68. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USA2P1913688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74435fca371d75f29c0d946c7935bb0d8d85a3a4806add9bfc732dbf2760bae. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA2P1913693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a91c3e403311509e877b08284ed4818eee7291bf4723ae3c1eaaf8d377d243b. 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/USA2P1660508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bdcf7392425c5765b40b67a3b9a0bfc190f5e40271ffcf3b5a42996cf38dce. 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/USA2P1660518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da9c53e6a9db590fa35ff7d7aa3198a62248f950e731ea3cc5d558482799821. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/USA2P1660499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701c087b7524ca85b500a90c330191820711baa61818bbe3220448a8bb4df6fc. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USA2P1660513.