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 0xd227f849a1111cb58720c3111ef94fcc04e6429619f637a4501b1fd92a665979. 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/f8f3ec91-f72a-4463-8325-c919d21be189.json and https://artists.proofprofile.net/proofs/artist/f8f3ec91-f72a-4463-8325-c919d21be189.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 0x6aacf5e9035f56c505bbbcaeda01735c98ed68b9a9df7688911bfb0198ac2c0c. 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/FR59R2522894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537a00e504fa17a4b9075e99541068f56d81cc93e9804705485355ac833899f2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR59R2528725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f88f10abbfc9d738f9160fe22f784dcac9d00b2d88870ea36fc202f4b24319. 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/FR59R2528728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a146bd7446f2bcfe92ca4f56fe4cd725eb1f14d7430397c9203d8910e1e62f. 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/FR59R2528732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad36b4582983f098a3b2dc98252b1dec48a9bf347282ee3fac21846bece456f9. 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/US3DF2410703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fb3d49b29f1d159e55934be6a582d7ad751bd5eeb511e669ec35d19119e8da. 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/US3DF2410708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866f58e567baf53a55bc2fcdafa2144c402c80cdb275d07d88c836384d580c60. 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/UKZGC2503882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f514894563b06e458c03bee2398973526a0fdbff6bcdf5b60970539b2fc5766. 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/UKZGC2503926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0124c69cdf10551db5804433546f2918c82e26be4d668880636de1e68fcfdb1f. 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/UKZGC2503927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94134ff38448f1f8afd8bf4fd0ff9a76874a199b90d0cd531b7e5dc2578111df. 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/UKZGC2503928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86881e4de33420e9acaf1a6fce1a256e6c58c0312351323566d6674e4d10754. 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/DE10G2500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26634a4ff4c12d29bba80bece42f1524903c5ef6fee92f62773359e878db6e2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US3DF2546784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aacf5e9035f56c505bbbcaeda01735c98ed68b9a9df7688911bfb0198ac2c0c. 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/FR59R2522894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e86c6dbd0dcd871c68687745fbf80f5e3ac6487bb50e5a2a1545607cac3aa2. 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/UKZGC2501942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ff7d9e060ae2ddf567d6bbba3db0b0501b5a780bc2ed8925e0b01ecdfae717. 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/QM3DF2413538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c5896528953b468252e63565482496b24489e852d37096319fed2e3d3f402d. 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/FXR592401571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d1853486702d017b49057792f94740786ec98993045ee507063d43f3cfc38. 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/UKZGC2405677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43667c1ed43141e741ff56980bafc2073d8d6b5628ab2aa9f4301a8d4fd82e1. 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/US3DF2407821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd492c7df68bb00e1d5863ee5a6841e7f5a2e4a70017dee34755f354a816f3ce4. 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/UKZGC2402893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fb3d49b29f1d159e55934be6a582d7ad751bd5eeb511e669ec35d19119e8da. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/US3DF2410708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6768530112fcecd5a80e14a30cb6016a4346002ad0476889d3aa6573e66e9dc4. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/US3DF2410704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf141c593f6c2542f1c4599e28398da43ddb41bf5e25b58fe03de4c23fcb00ca. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMANG2250440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0398bbf7e4d1e027396eab4a434e3f9ede163a2bdbae7685c20957a3f6ad4783. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMANG2231017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c3f304b103f5eff0c6ef6dd854ebe61b9659a828c2ececfb53e0a5d90bc495. 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/QM3DF2292971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22648a8cb9aadb5b736b0c55b06702f997c3612c83c162093ca0c298190ea74a. 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/UKZGC2304209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff552abf91f312b88f7c2d614a8520f527476b7abe34832b13d63bf17996190. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM3DF2219863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a6aac8a9cb0a1f65db0d6d8c4c8651238852a5687227b30eb66918646afda2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKZGC2303859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0044468510cde59085573755eebe97c1041a612a060ca9fcfb33286c77a7986. 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/QZN882394955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcfeb9b86d0cb67b5883a5aa7da4434da179cc8d5e2b74775f53d9deb98a17d. 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/UKZGC2300530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88607d76b26992f1e522a22c96ab1753ecb2545c4e550e9515f029ec3aeba118. 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/CH7812236344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0151ae36b2e04389d6133b85c48aca0214585b9687b1f8d4b5b460f03a7f804. 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/QZK6P2251573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb993bb9afe0b9a93f6c80a6cafb16c6acc9d8ddfc6a2735544f57e741e7d5e. 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/QZHN92250465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6474a22adf7e4bd3f103bc4046af36c25c439618fad62cca151e275359d4da. 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/UKZGC2404373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd492c7df68bb00e1d5863ee5a6841e7f5a2e4a70017dee34755f354a816f3ce4. 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/UKZGC2402893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22648a8cb9aadb5b736b0c55b06702f997c3612c83c162093ca0c298190ea74a. 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/UKZGC2304209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a6aac8a9cb0a1f65db0d6d8c4c8651238852a5687227b30eb66918646afda2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKZGC2303859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0044468510cde59085573755eebe97c1041a612a060ca9fcfb33286c77a7986. 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/QZN882394955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d1853486702d017b49057792f94740786ec98993045ee507063d43f3cfc38. 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/UKZGC2405677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014142efbd97e0797b8ba2b928eec410af3cb5d678ba41132ee31f7eff1d101d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKZGC2404437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea80ad22218d8be69ab35955ee054a9d29fe697ada94890e7007afda2f32aeb1. 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/UKZGC2301536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3339e9d09a38d248a397fdb7ef4968fd2a8a7f789f02bd35d507098efaf2bebc. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/AUMEV2391636.