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 0xc11670a3d9e874abbeda82b7a36088071cbcf6d6401635da15f8734d9d73c77c. 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/83b241ed-e4b3-421c-a79d-7ff13d73517d.json and https://artists.proofprofile.net/proofs/artist/83b241ed-e4b3-421c-a79d-7ff13d73517d.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 0x70030e2b8f687deb302427f1ddc03bfda37f81e9fd687e78c95a58a74e0ef9c9. 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/QZWFQ2415541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd800557da1a0e763f64f34593c613a7a116ee1cb4e65da8ed5d7d50e6f41f61. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFF2431182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fe75e266b2bdf24a09639da5ad03bf4afc18fe3990bbeff0772c14e407be53. 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/QZTLA2458683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc95447fca70c505b6dc7f918960bc2bd9e68f71d7ca96156b75719b4dc6cf2. 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/QZTAY2499013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa957fe15c37c950095e65adcc651de4a4232a83c87b9bf6641279eac14f67f5b. 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/QZQAY2477131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475b85d69861c0b109608905bdbe40007812f3c545b98a8c0618311f7fb967c7. 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/QZSYP2417681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaa19e785be53fc2bdef802b33928febe11f39d6f600c4daabf15db0b10d63d. 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/QZHNC2490636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf80c11172c02cbc9dce4645256c3b371e6578a1c3a0c30cce34bd778bfbc859. 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/QZS7J2341011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf40b982835d4adb25e9a3ec54faf8793f5487308bf08e26f44660937dd1b34. 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/QZQAY2449434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ff04b3a9acb1e387b3143a22799696f60a8a1de5c2177b60dec8f3bddd7fe0. 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/QZQAY2421897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291e09ecbc942cc45fd558bfc8ddfaf54bd77e668df74b8d78d312b179dc1c32. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZQAY2406512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46edb7575ee325d931ff9c435b20dd4d3217741d297797f906ebf2bdbf5cd2be. 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/QZS7J2328009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf40b982835d4adb25e9a3ec54faf8793f5487308bf08e26f44660937dd1b34. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQAY2449434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ff04b3a9acb1e387b3143a22799696f60a8a1de5c2177b60dec8f3bddd7fe0. 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/QZQAY2421897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28e15e960318c405125801268179ac7bb4f723698045a30a776c6f2b6f69543. 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/QZSYP2379217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6091251114c8bed46ca6502b25f3c91ef8821683dcf09cba2bbc91909b8aa37. 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/QZWFE2344498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46edb7575ee325d931ff9c435b20dd4d3217741d297797f906ebf2bdbf5cd2be. 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/QZS7J2328009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf80c11172c02cbc9dce4645256c3b371e6578a1c3a0c30cce34bd778bfbc859. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS7J2341011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddc704cab9b560dfb62c468db513629ef3bf9a3a6fac76ff06f17e34b597785. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZQAY2365149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed8fffb1dfcdebddd6e05cdeaf94648d91aa5a2ef6f037ac1ae981e47017cc3. 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/QZQAY2375519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6283bc609df9eb5342bf7b81c0f48a1bae5c0c1358150b54b6fdce7b6c4081. 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/QZQAY2341511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebbf6900008d40ccd14e9d078fac5e70c5e7b5c2870111599b2f63f93722edc. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZQAY2338010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfac24c8720f21aca004532a03c5563ea2f65f8cd1da1c7afcfc3a0281aacc4. 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/QZTLA2334481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad5e4adcf9b1cb2b7b6215abf2094168ca6be95fb2a33bf22992f5c85f82ac0. 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/QZTLA2370894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc250d2e68d6b6b14d867541a115e93a9c343281cf09247d0e9516099ff29b27f. 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/QZFZ32306758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd67ac3f2a9d2dcc5a0b7ba61004b1de0469e82685f950a7899308eb78b3f6d7. 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/QZTBA2259970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44272933ad40e066868963240fe34006308e8f3111363691113e2c3ae362b1b. 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/QZRP42294366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4f0e57ec65e2b71b96b24c28050db1b8e2264f44406e71b093c1fef0d5e712. 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/QMBZ92475525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa135a5d4ab53c31b05740458a9391e25c5a12e5e316c79ed71db240c8a8105e1. 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/QZES82294709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612753008a78e16207c6f4e72e6c91b3bec85324c6c7d61fd619f77e10e59cc9. 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/QZTAU2316264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a36970bdb741bed1416cedc7fbe9c68a666b4b6a5725ab6a7aed6be66c0dd73. 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/QZTAU2316268.