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 0xcf83cc3e2987b34fcb735d7736a55d2fdc5f7587b17469d0e1b47a57bf3c363c. 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/f1d722bf-e40c-4830-9516-0827e1d2dffd.json and https://artists.proofprofile.net/proofs/artist/f1d722bf-e40c-4830-9516-0827e1d2dffd.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 0x7bfc5a1dc3527e5bc4270bc6ec7e31f3dc25a6196ee5e6959679d1db74f6c266. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX75Y1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ef5181407ed36f25cfb2ab878e3b8542fa62f227137637ce6a39126821d533. 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/BCNMP2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73b92c7aa38cc7fa4316ab0704f22fb979f94b460f9b8a9cc8f7f789ff05253. 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/BCJTB2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e89ad86651d3ffd86bd14986cc5c9ed47fd37a6a5e20f0604d9f1fc6880c3c. 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/BCJTB2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59022f3f62922e310c9eff7a00adc98f78eb4413e4447178712329b77dea76d7. 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/BCJTB2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcece15224833230a9c016f18bb37e9760e9a9b6e7b47b6c772f35a382b2cc9f6. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BCJTB2300007.
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 0x1af74cc6b76267d3e7a0e61c6c62aea82fdb9074db2f7088845620a3419ea992. 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/BCJTB2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de9a9aecd3de57cd9793d5364ceec333a469a9ec9c464ccf3e9d1540b2785f0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BCJTB2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c5440d7a21d1487fa51e6ea648308a12c775c0202fa9234ba36172576ec9fe. 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/BCJTB2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e26b6fe6780fae5c846cc2aabb968c8ccdec7dccd844b3f6245321f2288288. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCJTB2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cdd39f5f63b6b1cf278320d8b43ee0e784d40c543899bcf0c6958b26eecfce. 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/BCJTB2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33fdbb8e43b3379698acd289083c9cb97f18729848d909d8347e2b6123f97ac. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:58:56Z), 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/USLZJ2429512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c320b6eb29258e21832f9b409acd72273453063006c8d5819c89e471f01be3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USLZJ2429543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714006c299b0fb7719b52a7ce2036cdf514cd208e8adf306c1829df8d3b2e33d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:28Z), 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/USLZJ2429591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066ddf960cc8f2f311c0d5825196f56067678a6cc531e2add7273ebb790f2650. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLZJ2429610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10524daeb87653965a0cc29e336dcb231e0a5e2afb2e1f77c782ae74b4231cb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ8B2408429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62fee4b317571248ef9ccc725c8086b846781a173b88df61b1c92bd5e8e345e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ8B2408442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a50ad334495566cab4f23b9b491397080ba317a7146feb9550301c0896674e3. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZZ8B2408449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432226474a7947c7d5432f0d0e828e1f37c4157ce2e3ab6f8a4cb05a08c5bbec. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:36:47Z), 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/QZZ8B2408826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137330caf5e9386a641795f4d577ad6a332913aa555979b5ef870496f2eac0a7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZZ8B2408867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6a87455dbe0d70e93c953d586a5bd784f15089e8a711025109320e18843a5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBWUL2575356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279f098c36869f36133020519d5df226694d1a6feb37f8a9201ed232b211b95c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:03Z), 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/QZWDD2581444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4965de6be1683d0ba9ed77e2a78f06cca1175eafa3377c78cf609e6b2aae6304. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:51:56Z), 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/QZWDE2515787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5aab065ed8d504ba781c1f00013f1e9eee7aa2179787db47abd5ea50e95e53. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWDE2516129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c77016c47f669cf45c04d3ea4f93df5c2fccec88af6f0c42d29ed24d073b766. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWDE2517818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2820f6142331c5941a2600231cee771cee78dacef724281493b1ba5ec73cc38c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWDE2518288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61569af9f027c8fd8cb5772b42a7410a97724aaee8e2a065cfddbf05ce8766d3. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:37Z), 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/QZWDE2519442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6246b60f28e268cbcef94e588fa9ef89bb3a73c9973d847a9883361843756dd. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWDE2520171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385d4eb9cb906e97e266e1abd3ff2db2746a58ecc709dccfeebe6d35c7099dd3. 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/BRRGE2300611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5108664fc2598f6516874d5804e86da00636d021f662c39f3e88ff239439a1b. 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/BX3AW2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385d4eb9cb906e97e266e1abd3ff2db2746a58ecc709dccfeebe6d35c7099dd3. 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/BRRGE2300611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf388bd47c50236d12bf1b8b64f468abdc4fb443e72fabaa94c398cd52626375. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX2DO2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63af537101a3ffd6386c82a0dad22b9f02e041fc1ee758d2045ad1f202a7d7d. 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/BX2DO2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a109913c0651935ff1569cbc315550da14c8329df41d32cfde2bfa56b6eccc5. 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/BRRGE1905678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eb03aeebed964101170ff0ce531f86bf06141e500b98f96a94f8b5b104d5b0. 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/BRRGE2102435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a109913c0651935ff1569cbc315550da14c8329df41d32cfde2bfa56b6eccc5. 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/BRRGE1905678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5108664fc2598f6516874d5804e86da00636d021f662c39f3e88ff239439a1b. 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/BX3AW2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf52aa01fc2fabfedddfed36ef89a6e8ee4f58e7b8be784562f9e5150f15b41. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BX75Y2400180.