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 0xe9a3fb0c125b49f5dc0b38b0f1d963e2d1ebcdc055612f18a7fcca40a8283ec3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/854de8e0-ca7b-44f7-a88b-bc5ab7f2d98e.json and https://artists.proofprofile.net/proofs/artist/854de8e0-ca7b-44f7-a88b-bc5ab7f2d98e.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 0xf75214538f449c3d35666128c56017ad71ac1298248937dce0a449ddd36140a2. 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/GBLFP2160283.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4367a1364c639aecb6d801424fa0e9fadc5ba1cb2b0bcfccffef05468a663ca0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QMANG2220968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e3869e568e894e4dc50a59b2cf4ca584dbfc676c08fc612473b76bf2f631e4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USANG2270734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb6d377a45fe1b762bf7e75096920540a76e88b5b1aed902840921771740c92. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QM3DF2240897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0ca1caf71b6efaa99d1d7abede2a1d90540dac6f8ecbe95f2ce0da7ff7132d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/US3DF2273176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b291346b3aeb42861a188dcbcf9f3838294a567327077a4f2dc67218f88a7e. 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/QMANG2294532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1919760a7c5a1e7e873edc63345c97ae45a4c61f3562687ce0e6d591173fc3c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/US3DF2299919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a04773f89d30a3f485a4e52d2b113cf28f0009f035b91212a4d9b5507a9918. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:19Z), 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/QMANG2247635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0b68e33815624041ec68880dbe160b1ae7e4cd011833c7356f0a3615c12fc6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM3DF2222144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a157c9be8d806cce8dda8b094a50246f85282c55af497023b5dae7e61cf2a4. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QMANG2256398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1adb36761413d58ff164c8fa8d071d04b7c0e2d814730dcc437d542f2cc0fd. 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/QMANG2276797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd82d1d557f807f9d677bcc0965b88d03f7279c4eb605015fefe3d2d9bc65009. 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/QM3DF2296425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13099909df9f3e11baafd54d9b4aa56f7196bde36579ef21361a117255802c9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMANG2225111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d576410a29cb2650a538a5a8984a77e712ce26ea1d98bada75faf5fa6e3db7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:03:45Z), 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/QMANG2222062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f969b5197b16b511a71af32a59d93d3375efd60650f3147c5ff5f7135f1b38. 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/USANG2208258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b9ed23676f9749223b4e08142f2a0e302aacc3de4aa3cf37f2d79d6b15adf1. 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/QZFZ22493706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c9e4333ce42391a48f0d9ad4fcf814320caa54ca6cbf16a52e374106dfdd30. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFZ42401145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb05562c79d870f2ea9933af4002ed41b8d9a72396f15467ca1589a46d04b784. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFZ42401146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46ebccbccf1159f5606981eac1f8364d9eb7b506352ef277ccb3e2200d97a74. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ42401147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5266733d0743aa9654cf4450058454e9681dbaf998150759d9fc87182d9b7f3c. 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/QZFZ42401148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9573747d4aaf7275712e79d7e8719e56e5c068124308c4005a89e74a9a9aecb. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:39Z), 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/QZFZ42401149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd240d651398f644c4d1dd3267e26fe944a9f68aeadbdd1427abfc3fdd1809ec4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ42401150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3654be9df4434491ad611abbe5dfe376f5b25697db8d44454d0281318f87b6de. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ42401151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d67727c72e015b8627421ccb990d700a76d2702eec711a3255ee062df6fb473. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFZ42401152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7d281ab559160c67460efd544d56ed88fcd787ca1579e4a02ed1364dc1ce1f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:27:21Z), 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/QZFZ42401153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba792b3006c9a7752206c7cd2719972401c72b9db09b37cdfffc6aa604eb6be0. 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/QZDA62469270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03d86ba75bd2c6a7ba2669ff68ca99dffda75f1f1a4c4c612a5b23fcb133d8b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:42Z), 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/QZDA62472860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c00a4ca83f1d8b9988823033a13ca2fc61bd313ddf6569afb54a2c184b1e290. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:02:32Z), 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/QZHNC2427877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c3eeade11a66854b10507b9eb2698d15002f085a645b8561ea54ce0020635. 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/QZHNC2427879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8367a37bb3ae0d8b40be2db15d0d4da613ae951c8c013082d6eef29c7aaaa826. 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/QZHNC2427880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c6beed2623af129f18fc92a776b339b569487c8deb0604a3ae9063876813b6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6P2433811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d6a62f730fdfbb6e93e4831be01a7f4f38c37d646735ca8bb1704a34e0229. 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/QZK6P2433820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772cf6d9c5d2a7169894dddedd6ebc1be66c62e74f87170308433d49bc971b93. 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/QMANG2232972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb87a0ad8e5bbecac1249c1403f712b13c9274b4f84c16390a62c65660da683. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USANG2238969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e256adb55c29b99182760032fe6538f3990979a426b086c72f08f7f904e5e7. 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/BX4IU2315294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd45faa91303e0b2f53a8d5ff428a19ee353c4028a773bc58ae4b676fa802ce. 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/BX4IU2315288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e291e5adf22185ec6df2516d91094d22ae219dc114c7baba02018d1fc034ccd. 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/BX4IU2315292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ef9f7d38b4f30dde907dbdcc5ca3cc9b459ce418f00377372633d2db97562c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMANG2282377.
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