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 0xff1b00a4f9c1f43dbd41ff720268296f4dac254a4a6f6c8e0c5d863dea8e710a. Chain 2 (Bitcoin): anchored in block 954139 (2026-06-17T21:12:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7eb5db68-334f-4868-9974-fbf83bb2e87d.json and https://artists.proofprofile.net/proofs/artist/7eb5db68-334f-4868-9974-fbf83bb2e87d.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 0x1f5480450d88de1eb019c929b945984b23713d3e9b38eb1b41e5247e0f257a39. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82502283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988d561e6c14fb7ea9cdcfd50b709c5a38f43065bcb56112e295adcde58ec1bd. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DEZN82502249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf481de1baf236a064f45b7b97a3c511cf7017087fc62e1437f4ef69dffd4e5c8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82502247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa44d27a35fc3c7df377934eff4b9479e70950e660670895d445ac990b4f0ad. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82502194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd5907145982d1274f735087ca453743c8289c8a2dbacea15608245a90291c6. 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/DEZN82502259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d4b7bfdd2eff3579771138daefd07d88e3ec0a1b931dd68d654737fa5801a0. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DEZN82502254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc817f772f0bf65f2daa96489af9e1ebd16e8aa8f0c21dde488ab53a3b9d9424. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82502250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9863f081d95eb201c54f4d1b15b3c9a291fa28c1704ab372a6c34f0ddbe2e3e3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82502268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a9f2d9d18464e08d41b17eab4d30f502a6465e0d26abd3b9f21e90c3603daa. 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/DEZN82502280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc16367cef69b6bcb4441795123fe5da048b8d4a3251a4d3c1ee7eb3b25b5f7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82502274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aba2fd4b0839b9434c40cb4baaf56affeb8918348e1eec1cb67d2ce2ca7f2ea. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/DEZN82502278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517fa58230d2479a9f5df052fed4957205fe1790aa864a185c440c6580f6cbb2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82502273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ec94785014109d7c3d7c44a10a01c79f38632ccbfb2dd21ef3b011623ff192. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82502202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb1c9711f8141030bc0ffdc53f9757bac240a5f02448b848bfbb9027a253054. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEZN82502265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493e104d8bc3e0a22e9f8ce23d597bdaa862369257ebd07bdc2419611aa513ae. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/DEZN82502271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e34c208a0a59d901cf0237b23c157702c461ef9a8a74c0560eb302768bb68ad. 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/DEZN82502281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79814028d8b9e31869f0d4e90bd2a1369121c0f8a1a118c3a3f885d6217b26e7. 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/DEZN82502255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8024688578dbc482047d4c7d9b8d5edddca5434d7364a84689b991ac7002fa70. 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/DEZN82502238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1b85c73f7142550d65657b015b0aee3f8504626eabef63068b24c72a18112d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82502276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b67350c9782656555142f053d94a52f5337880a86fc7a83f523c2215732175. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82502209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c58d590dd62cc4ce6f302c2994713bc5b4d5576cdc5445d09cd225ccbcc028. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZN82502256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e08525e4e5778fcc537c8420f7eb1ad8008f2d8c4a382979d0ad7725d6b06c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZN82502243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7402b5715d27c393fd21d53874b64eb4b47cac2b5fcedbe643ba6f85232f5f. 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/DEZN82502206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a1488ee39c011da0cb5fe212f575474129422556c232b9322d48bd283f9605. 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/DEZN82502198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc9caae50e3a5ec71abdd29ff182f9f2ad5f93d8b8fbfe536d07b844f51396a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZN82502264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f57285adbe258e4a47b5780b2aae77b1438c2e8171956a0d2a6f31b559d9855. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/DEZN82502262.