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 0x3e5307113f643a58518266da22e4fc125a559431289948e155196aa78062e790. 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/dee7f490-e56e-47b7-b023-a6c3d32742d3.json and https://artists.proofprofile.net/proofs/artist/dee7f490-e56e-47b7-b023-a6c3d32742d3.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 0x9a69abe55a1e0d161f72f9351defde71fde8569dc905211f05adae4b4170d74a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR1MF1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5dabc9d44ff38b890d10a5e39bc193ca64758974ff6409769bc9e95f4eaf9e. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FR9W11505261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f63f3f93ffbdd8638757028d318e3bba6c59ccabc4ba9f625f3d02771c32d31. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FRPHR1800360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa858e84de48d6c5f24004999ac8b4d362d6298f69243657ab96520fff5e6086. 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/FRPHR1800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fc0beba881ff480e536259d7279f79d491784ca164a8db1d2269f4a515434b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FR9W11827728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a32729584cefb1127d3059353bf4ea858fe6e8a022e0206d11a5ebad692fed. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FRPHR1900270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1b6855600e583d3de0821adc70e5125da122edff4260dd3f301a7c2b4ddcd9. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/FRPHR1900280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e923b505d0c0100a261afa4c81e1cf8dfa794dec9cfef895d1b2650ddc54f41. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/FRPHR1900310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb167ee038fe9370146281fa01007d69a7caaa45dea66c5033c73d8d4c5862d42. 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/FRPHR2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096d78a7c479801eb5c7510bfa63141d61a7e37d0ac5e8e810f2cbf16e46726. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FRPHR2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bff9aa9f42ee7a3c960ef428c16c02c8f9919afa5289050f70fd2e590e9fb69. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/FRPHR2200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e1ace868f39f8dcd7312a2ebc272b214a9ff0cc3d8da3e29985a9416c2e29a. 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/FRPHR2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177098169f103de751b6217652c147ca1fef96ce403f3b784e98d76345b32f41. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/FR7Z22200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282e72eb9ead6da34c8e7478736fa9008166f95e2d98e325fc93de108b8024a2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRPHR2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0aa5d8a2ddde7dd4cbf13c3103dcda764ea3ef6acddce69430b832c5c44859. 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/FRPHR2200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cfa566ab01046c9cfd8bde5131ec51548fe776e5eb56f2526c873906bc8bbe. 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/FRPHR2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cc700b53dddcea25c400887aec0be67cc92f8018a6becc8a00103f630ad74e. 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/FRPHR2200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5260f248c276bb8bc84e0c55c81a2abc96893b49d0edf24f47541a0a7bd1736. 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/FRPHR2200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7012d3667e95e060c8c704ed675a36a7a1a3ed10cc9d76c3fd547a3a667ea015. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FRPHR2200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda41e763732a0eb6787684230e97a5da4ca7c9b9c7935098e8ce17a45ef4cae. 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/FRPHR2200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde224176bc43457d42067329a9c06f72c7357ff63ca5143623819218eef65540. 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/BEN812100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadabaad92c407fad56640c7a2f2e65484ab8de9662e6689f645a74578a970e31. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRPHR2500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9170c849cbac9c69462f5e136f6658f55b4eaa808852a4820202b5f1c8d1236. 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/FRPHR2500070.