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 0x0133b8e8a3295b24879a717069be5d89a027c19484145967caf08913f0df1d5b. 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/f8552257-879e-4bb9-b40a-9bd4dadf71c5.json and https://artists.proofprofile.net/proofs/artist/f8552257-879e-4bb9-b40a-9bd4dadf71c5.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 0x6397b0e7934d094a1ce0dcaa69217d8120c2201d5c35791d90ccf9934eddcf54. 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/NLCK41070878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfac472301b3b9df4631712b3cfe4c36c04c5a963dfef706e06f2430135f760. 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/NLCK41080090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ba61b5ee4443a69ff05c4accf53b606c5944dc5d1095a861471dcbbab07833. 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/NLFL72100236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab8cc70110f8eb00a2d3fdfd5837b4ac9c88f32d5e4bcd57b3a92cbb69b68a5. 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/NLFL72100992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb109f423473dd0cc57dc00a0e46389147caf873496923388e0b8c2d250c53816. 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/NLFL72101032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3d96119e88a0ae55d5d1fa3cd0298733a22634a438d3c2cc98063d8efaf68b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NLFL72101033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e20a8837848aedd48c910e0ee5ff2f3ff8208b3863ab4ff37d0c9c26a432402. 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/NLFL72101266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba88a194c6a68ea4081925c773f5698e6b44b07e46bd19ed110cd4bd8a4c554. 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/NLCK42227296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2613f60dc69e389183fe3b0b10ba34dca64e42c0c0259327171feb50770adf. 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/NLFL72300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4646e6e44435a86d22482d5928f7e7bd4131e733615086c4a2d3e67995246b0. 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/NLFL72300540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d89fb08d08fb00cffd8d9aaf06e392451e9d64c6762bd38716fc959649e9dd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBKQU2395283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb6aa8f5fdec6c825bd2108d69e511ce000967ce8f57829974286ef2a6b448f. 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/GBKQU2399540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3170916057b9d7da9efd6be9d6679418e9b77f819d7639af08f1c07ffdb1786. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBKQU2451987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8018789f3773e8e5c81b84a533174e6b95bf90b41637635243eecab5e4571b7f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/GBKQU2466667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95158ad6bf4f14e86b4b27e5a07ab905c35f760cb82f0127a633b81b208c4182. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/NLFL72500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6439dde20513c4ae75e0bec600e1840a0c7d8c1690590564b27d9b4bdb918d9b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLFL72500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426ad61273a4731dc3cfb52a881656cc6a1e3cf90990fe1e66387630f1426532. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GBKQU2598705.
Masters Of Hardcore - Magnum Opus (Chapter XLII)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e47be1b46b0803d4d26aad8eb206e5ae20d6425c0a6b75800ae7877a5eede26. 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/NLFL72000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4646e6e44435a86d22482d5928f7e7bd4131e733615086c4a2d3e67995246b0. 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/NLFL72300540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f337bb68a110e565ee439e94c51a80c1f196cbeed16155b99e1b4f3f2de030. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLFL72300796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d89fb08d08fb00cffd8d9aaf06e392451e9d64c6762bd38716fc959649e9dd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBKQU2395283.
Dominator - Rally Of Retribution (Mixed By Angerfist, The Satan & Negative A)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadba0806d56cb0abe56a192a8b76e5e5da824ffb2387d0d2fc1d938d10333507. 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/NLS241900370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252609c7541e1939300636a585aa05c6d2a1f2f37ce8f03592bce73c2165ee49. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/NLS241900378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70925d8a8755eae67154bc20d9dd2f0d9cae5ca97297dfe56e0f80c758f895bc. 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/NLCK41043949.
Masters Of Hardcore Chapter XLV (2023) - Cosmic Conquest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5cc1508d1bc78a888645f625795d4469118da7eeac9a9d727830891694d928. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBKQU2311549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e20a8837848aedd48c910e0ee5ff2f3ff8208b3863ab4ff37d0c9c26a432402. 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/NLFL72101266.
Syndicate 2023 - Ambassadors in Harder Styles (selected by Hysta, Juliëx, Deluzion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2613f60dc69e389183fe3b0b10ba34dca64e42c0c0259327171feb50770adf. 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/NLFL72300325.