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 0x8a32e2041d246b0da2b359644a22ea2b945ec09ef793884ff28ee23ee7a886f2. 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/c8eba9ba-f3a8-41f5-974a-9aa1e57561f2.json and https://artists.proofprofile.net/proofs/artist/c8eba9ba-f3a8-41f5-974a-9aa1e57561f2.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 0xba08c8fc40d8c0b0e585b34d19e93113e47076c202be9da7da45b97eb6339f26. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USX9P2098824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba0a5f7f5a6a3c9789818d65d90e8672365f37187849913c4a938828dd0396a. 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/QZES82215176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204116e0518053deb006bd63b203d605fab98b7d100321f590c4b24cf2b517eb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES92298744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d02540739fba0de1b36d5ca114ddc3417782faa3c16530fe10d48d6ae677da. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZES92247973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029be48ae1d7d3c26a2849d1b9349a6a14eaf0bcfeec6d60593aaa7f2edc87ec. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES92248400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf43da7a10e81558345749c25cedf64ab8d0f7d6461f7af607edeb129916171. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN62228050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acbee774dd7a430802dbae27f6dde099018b7c48eaaa0469001e05dd87eae84. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/GBRKQ2231311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23537b1c27a3e713ceb4c9d38d60d06e7857174c73d9b4df58780343aab8b4fc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN52262581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc37736d40ac45c90ddd900e923f33cc3207f90f20ee27d4496d514bd5e7949b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:43:08Z), 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/QZES72273708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bc24e4eea09b537b45e1a84ef707481eec921c3499d53c8fc28626b8b5fd4c. 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/QZHN52266604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d41848ea46fd3dbab63389e54690041f76d006c8812178f9f84e02bbf776d1d. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZW9M2249939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1546faafa0d343f3161f3a637edefdac6ac688f4a17a4440b445d177b799d1bf. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZ5FN2317610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd1f802598ff433d6d89c7fda1142044f7c860801117dac7e559fca4fa46789. 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/QZ5FN2363736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f36a2900068e7f6161618fe6e1effa9d7792ac6132128c218779841b361ef25. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5FN2359540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85436b9b15a8a043517f272b28639aab7d4596f14581e01bba25afb40cadb9fe. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZ5FN2359558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5757216e82528152113fbfcfd9123ddd940d51b00ee09422a37f13d9c2fa1cb6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBRKQ2326214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ea0067a0868f250170467c52fb51e34902bd1841bb59f2d89c3a1355699e7e. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GBWUL2361510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb334470044da038112b1d228e2a52337d039ecfa93468a139d3573845c21ef. 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/QZWDD2385351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f97506f9f44f6c6609ad3de22115be1bcc63e40ebfca6cb8bc48b40213d107b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ8B2396979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5b5c14f2ee896adc13a52fb68bcc1e49edd1673c49deb08e0ec2d1d800b96f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZEC2323935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743a0fe7f037e375dfc0f487ea213ed616cd37207da122ed2b6a647d8ac4229e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USLZJ2488124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb1a58271d7c6c9fac0c69f0d47b8152e6352d50e0e595407320be0d4f06197. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USLZJ2488804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76db728f97184a6070c20e20a2d917b561faa1b10f52b4dc7b8634f004392c31. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTRX2409443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df105742ff7cbefee9df04ad8f739d72c208678ffb11e6ed04f7da43487480e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTRX2473183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd830f526343b60216a2016a1a2f7bd7d4ab5a8e698370ab7c0d9e6a8b5f2ad3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWDW2437884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd844122778e1884baba06e26320aeee422a2b6f9920034b9522ae5fb52bcbe3d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZWDW2437887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbd9aaf8ed36620e146f2b8c1a8fbf1a78d6e3af9a995e6fa862b04b986c303. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZN882528336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf525d0cb654750c2c4592e05be47f457b88ba058e8db84421bfabf755b07c60a. 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/QZN882529380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf076616f8ef5262f2b96b478e270a7cdcddd08bf9053a7930342228969e4b248. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZN882543440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400da6c5bb4455b6a4694f72b34829de547f7b2e181925c5b9864ab63055006d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:02:56Z), 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/AEA3A2087998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd353221273080f21c6afd68080032ee33aa0d45bc5a063ce5e5abd730a385739. 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/QZWV32457506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501eea47018b1f41953c2f3dd46c2fb824777b75fe5833b55f923068c525b4dd. 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/QZ5FN2309890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09102f844db4ab5a063d3961b231e63ec42e25acaae442fbbe07a86948289ce. 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/QZXYG2400497.
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 0x5440e44b8ae558e3c43e4e94b071df1f0f5dd9abb26e5c548fe09bcdc5681db7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZW9L2272521.