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 0x4ac251313f13cc389d77dd785a41553f57b9bb2031f135db1796854b2a8b75d8. 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/0899222a-ef71-4da4-b6e2-4c269fec768c.json and https://artists.proofprofile.net/proofs/artist/0899222a-ef71-4da4-b6e2-4c269fec768c.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 0x012d97ac3c76a420e02d2222e8b5d4fc25bb03fe5a149f5b8225515b2e35af57. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZFYZ2216644.
1 OF 1 (gucciguccilouislouisfendifendiprada)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08868cc7eeedba73ab2df7d91ee258409c4f853a12d0d567e180bf4227aacb80. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES72230259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aa606fb487118ece18159316832dc6615f1b2c917a2800091c7e7c80f98ced. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZES82296209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7571c14494935008c128f8fe28b4e4613ea0bc1a1ca0294b0fc37367590eaa. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZHNA2215664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6022dadcb00fa26e69558980dd8f983e82d931f086c06bb8252d76ba6e1e0153. 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/QZTAZ2244049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4112f5ed8cdd8d5dfbc50664f0c567c506b0088a940bc04d5cf77aa3bb2a980e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA72333579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905059114d67abb78625ab89cdba8bfe113382e0f702cb38689fce90d95f9414. 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/QZHN52354496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dd15c82e5454043f4374dcc03458d8cbcfd108469dab26b9acfea7e1ef2170. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN42385559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994c7a34ca0264cb1f8800971ee37552a6af4ac36ee39eba218b02b74bfa6397. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEQ2374757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53cb869ca0a1e2c1c0a1438d7ac35d98c94308767d29082c5cf7b4eb2151eaa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBF2372219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240d572f41620c5caac2f8c73829841604d3358bd39e60a2e4d30fa9ac620c0a. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZK6M2467380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07443469fbcab542d16e87997915d90cef6d05210861958dcddfa198443e65fd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QT3EX2432743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54408c249c373ec90f27b6cd132a509923e97f4b810910307d293034db5a5dcf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ22526169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5fdb24a7410fded4dba3bbef5cece1939bb0f51b135e563f0e1f97ca9e1ac6. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZFZ22526170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa7cdb22109fdc50bb19d8fae81b62c239456f3f6ecfc51aff6784006105b7b. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZFZ22526171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07443469fbcab542d16e87997915d90cef6d05210861958dcddfa198443e65fd. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QT3EX2432743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5ffa3f482e11731f3e925f1562d5bf4445c4991757b2082b95981fe226206e. 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/QZES92508758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea8a0eca7c37beadff6cb10075af1b67354faca809d62c552f63188a7500cac. 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/QZDA62554827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce62f01660b7477a4b8571c2fa86cfde6b5c1abdde128f2625346186d4a0cca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA72581582.