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 0x908c2a3e8e4bbcfb45205da5d0f841424633c303baf19bca9d7551ace9e93fdb. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5636754-f289-4fe8-a314-63101c5eb369.json and https://artists.proofprofile.net/proofs/artist/e5636754-f289-4fe8-a314-63101c5eb369.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 0x4929663bbf969684cad4ad2a82a3fcd67140cdc7e5cfdde75ec0d130abc2489f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DES562310838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb02344d039bad1e9b17e5b6e8e1870b71607ab7475dc6be60f3cc1e3bec6be. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DES562310839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b59e16feb07272badba5a3ecebf7261994a091fee0bf23d6236f5614c232dd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DES562310840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3530939dd09bc91a554b45c6247aa73a1864c7bdd5b63b6bed415da831d70b27. 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/DES562310841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a724df85cb12becebe03659607c8ae4f029e11fcaffda80f46f4fb93e6beb9. 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/DES562310842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d0be829c73ab5cd0cfbc6bbe7e499560cc2deb127b744d9531f34d20ec2e36. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DES562310843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2569f5a217cbad36574849e9e2dba162cf0e97e2b35ba6abd989416349d12e08. 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/DES562310844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd690538ae7b444f171c12032f99f729f1d2e972863811a292a5c3d544ed3fd7. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DES562310845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a92681e253b5b3523bbeaef1e8162c0baacece7e9e7f5cb2ddf395af6c7cd1. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DES562310847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470193ee67c73c793a195c92842eec26d24e4c20bab08c5016b3038e0be2624c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DES562310849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef79624a632f45df11536705f803e00ca9a66af502404644062e0416e7e1f53a. 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/DES562310850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c423bf62f28a7a7302a54bc17e63f09ac2be166b0ef1d22638faa545c880ab. 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/DES562310851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7728d455e88aff5be8e8f2457b84082857aa5e71df2e6a09ab3d9298c4a6f493. 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/DES562310852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fdb69e1c49325439290f3bd30e634f70f8ec577fdc54ae96ebff182edfa2fd. 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/TCAIT2419754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c8f318db33339d4cbacf420207a58d1fa17a40130a96d7a10a4f372b63c5c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAIT2419760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09483c7c8a0162463848c69d4e115d73b4acfc8f5e8e3c69b59fe9c90902d692. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCAIU2419766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eba8f136448cdc15af9c7eb51096e927af019a7ab3a4a435497841c7002fec5. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TCAIT2419768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7a14409311fcd4f7acb3b2c8c37db631d55ec095c91026f04ae335c92c526d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAIU2419773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cf9b07e7694e716bbaad4fff0b42983d2d8004e0f8f29b115c597a20ef262c. 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/TCAIT2419775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845ee928915f9446b1c02d468133567eeee6545104d6cfa2a80227835f026aeb. 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/TCAIT2419781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8710b2bf6bf9a20d4fe175632f84b65b893a6546a7f1a411e9d50888c52af10f. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCAFW2193056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6fbbb26a0f8c1ebfd056dfefb138a776c03eb21c69f79238795830c79fc0da. 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/TCAFW2193059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6007ff04c4a87e6256d82f7757181e7b1ba0b21546b9d4db6a8e16fb3418c48a. 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/TCAFW2193061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67f5121e15a1579502e5d48f280b5e81cda2172fb4b529f363db8c784018662. 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/TCAFW2193066.