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 0xd1a58f4e72f8271f7f89debf2438a995b007d501301e57ca8fa390b3ff0c2da8. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b992a639-28af-4479-90f7-364c993c2c50.json and https://artists.proofprofile.net/proofs/artist/b992a639-28af-4479-90f7-364c993c2c50.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 0xc63178f7c4738bd1d4691705151f214f954b9bb304943a37da7ebb1ecdbc1e79. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN31989677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e015f94864eeb9a5a8b295ece20f059e4866d3c92ac36c724182211cd711119. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN31989679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bcd91e2a92d4b018204e7190f2436763b9fafc315370721f9cfc7dafe29cdc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN31989680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc074dba5164f927a982152ed33daf0a0451343cde51275061558d1fbfc74e4dd. 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/QZHN31989681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24afa01f4f0a417ca7076f49f984342a999d70b020116082ab5432cca1e6851f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZFZ61921813.
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 0x74da0948e011ce500980256defae330d9f11286a184629f745322c028d7cd27f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZFZ41973720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a13499a65ffb8cd5464a41d5e92ee0f94c3a800a3c7e0b217cfc9e9bb83cd13. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHN31989678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f4b39baf7eddb2a2f53a27cbbd1c98b3a6e27123cd5d7ba1ab0f1f4a21d59d. 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/JP92N2410818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6897269d84eac58188ef70b0cce1bad13d0f7c947c5e85ebedbf1dd9f52594fc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JP92N2410819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b72d0fb7b7638bedca5dabefc6e1c230dfb0576cfef7976697bd13d92c2e4f. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/JP92N2410820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7642c219a1cdbcc8327941e9baa73ca4ab5e27c1c43ab4ffaeaee49bea2904. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SES691600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b8a28772e5a966c1990f6068cc7b204d689b52df8227fda26605a574e7a0b1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SES691600403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769fc4bbf57fba29bc74baf0d83e9bf1453a41d6831f1e6effaefd54899a8d9c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SES691600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97b6608a07e7d4fc27f256520a089a040a7b17cb0f29e048cb2d836a337f7fb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA2B1402564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43259ae196f8565287951d0111a202dc28cadbb7743419e0318b7f8b55885db3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB7QY1400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13ec076b22f564480b9c17e74c318a8cf5d9736d000898fcea4627a562463b1. 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/GB7QY1400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6c2844bb7e21fc9943fbd5f707719c300867a1823610548b66e582ce2f0687. 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/US3DF1817863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16afb2abf5626631533ed8440e777cc518fa1dca6657f9bccb8f1a08406ce96e. 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/USA2B1804377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1276d301ccea84241168fdf98a7ca2d7fc2a22812f30623e1a92c3ffd45a8a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA2B1804378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845f79e9f02f02410b7e8fe910d07f024e134121e3427bacb23b60e9896fd23c. 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/GX38U2243270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd76100a05ed4ae985e4a6368f93a8da0e09d8cfdcb0d20a04bda789a29a4fe. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GX38U2243261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd51fcfdd45376019c0626b18c1e64ba2185ba3ea0b383679abbdef9481fa82. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX38U2243263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc5485bb6bc6335dc3c8505e0ae4d3503d563ec84711a3c244cd18260fdc2be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2243265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64f81213b8aeb5062d904310a1f2ca0aeb10ed08a2756a64bf3da62ad92dc2a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2243268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256bea19b8c691a54c5efe06e48fb95c86e2ad21c921a12a892352218f4aab64. 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/GX38U2243271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8db740dca0114ce521d4268f3190f3d718df46b0172b4cfcdd05ec9a43ddeab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX38U2243273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ccb9beb9c2e151e21df1867eaf4e7cc923ca52fce88ef42d3a91d420260f53. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GX38U2243274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388e35f1fc75d53d9dfceb496d38b19f20fbb3e05cd309759dd9a023333208ee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32404401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73af9e7c671948818222594e9b8ca34c6fe6c1bed874c1cfde1af7f93eebd347. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN32404403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f22dc181b2076ca7c02234c2936912decfa6adccf5fcbd3bebd8eb2061ff806. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32404404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ad8b1f24bef4152832454259b2466b5641b45eff64c2ac9cdaf3f242e9ba9a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32404409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e645fe8fcc0bfa145e1c555b57ed77f84d05e1ea1bb77ef8f14421ec54ab03. 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/QZHN32404410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2110b2adcb053b79d7a545ec90f9434684b2486e3d5a014ab28494fc362c335f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHN32404406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c50b6595290b368a910d5da06ed5fd314295e36307e9a82fc2646415b1945aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWW2492092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd10e0a335ac0693bf6acb2b310ca7ba5909fb00ed51e6933a730e50381810a. 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/QZNWW2492094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f423e6902b7c52b7b5d1b0fb3830a684762343bb67031e5257a8083ab934ef. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWW2492095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb017d8e8d48ed2e6e0e6ab62133aae0e208241d88128948af1505113c84270aa. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNWW2492097.