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 0x185d60cfd53a54a9e0f2ee238ec0c8dd4b56b78c006955789d9a60203b646c17. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9818542-4dbd-4c61-9454-416dc499057c.json and https://artists.proofprofile.net/proofs/artist/c9818542-4dbd-4c61-9454-416dc499057c.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 0x4415d4071686cf35fe4f24ace4dbe24202a7a90adc21bdac4355a57e3c3bb3c8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USHM21813643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f47282526abc9bc30a4f74472fad48080bba5e9faa9558425a51d8d9d1a6c7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:22:42Z), 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/USHM21813644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4aa473f3fb266fdd13218a0ae149402ad16504e0fb40d7b259457716bc928c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM21813646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a22bd42374b5ffa4641cd480e178b952da4a937a313e87484ccfe7ed649f332. 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/USHM81836629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cc6605aa5a790f5db0f6c07956d38dbd7bc525100b3dfd2e10d3fcddc28de6. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:07:26Z), 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/USHM81836634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe007f006ac419d16d4d8573bdbb5431c19483077a868cb8f87b9b18affbfb39e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USHM81836636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa5c6d189de9bab3d45887abdef9c1c6320b6ae77634f97927c1ab4176ed9cd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USHM81836637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa63cbc27ce24c5cfe5d517d834fea0338b5dbda955d6a24d74045b635de25f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81836639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf804c8edbfff5ec71a726f66c3f1e79ed0fd6b9fa7a5de1bd3ef0a7c08a8fb59. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM81836640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c286fddd6ff5dd3a2086b4e9576a152a256f40b5076ea1d50e5a62e86f32a96. 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/USHM81836641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7768679f906e0546494310f0b12601be1b8a3a3a81bb93cf47dc92642d24d3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWDW2438439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4bac8cdfdac38b1eb9e2009bcc2d3f85730e30ec7b501b020dd11e8751a4ab. 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/USZEG1502463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef501dc169de6833dd8d50584b1106bdf34dd626a2be357126622882ae09ac71. 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/USDY41760583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe164734453f331336bd6880c3ac360777bd843dd754034fe43d0dd1bd6e57d. 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/CZH112100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe164734453f331336bd6880c3ac360777bd843dd754034fe43d0dd1bd6e57d. 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/CZH112100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c0eed37c5dc624589db3e57c1a40c2fd48df034dea8d928435e160f4ea5ce. 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/CZA232001330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cf9262c30f496b2ddfc60570201609f83a42f462de851600fecfc0f6608522. 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/USHM91810169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad9edd744a405d4cdac2dd8a1df252c9b715f8cb68b71148376b167f0fd0f46. 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/USHM91810170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0905bea3524e4e3bcaffea5f70889c3039dd4cb6eb8ac89cd1bb35df423b0e0f. 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/SKG992100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a9f1b974f7ca217db537e57fbb709b0eed044d5449bc45658af92f5a25aa1d. 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/QZWDW2391331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25518f19a23a6dd08f46b471fb4f9db4bcf9e3e7a9d8607c2a3d455aedbf1f0e. 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/SKG992102003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf414d95e40b9d03cad0877cc6408b5a461814e03481d384096725a034b0c1e6d. 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/FRX201840079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa81d3e7a4643c8db29ff3c76f8f2bf9ce3ab028bb3688920c2744ee365ee63. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QZZ662342739.
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 0x3829a1cbb0ef66778256c21014109ecb063c90f3b9a646954a90898d54a006cf. 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/QMFMG1319125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d075f22ace1f876259ccae7555659a2156cb0083ed63c0ee33996a7d369ac2d. 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/QZK6P2122519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881fed25ae91b9a65de70f789629700ed324991addfa2f34f1a8e8664a4d5bf6. 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/QZYFZ2327818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f4cb6967d9a783fa5df8a79ae315df584b97b2a32bd50c12074dfb53cf7662. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CZE941600409.