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 0xa7176c37fda567fb4d586537d591ae916b19d7ee2080bc53ea8485e4a3a31db8. 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/3560df3a-6ce8-4aae-b449-bdae868eb67d.json and https://artists.proofprofile.net/proofs/artist/3560df3a-6ce8-4aae-b449-bdae868eb67d.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 0x88da0870787389008748b786b6df418dfccc7a4c6f7341f903db23021e32c8af. 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/UKLVE2401457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5b6e686a58de3821f5d3ccbbada7d62824046644c6d949a985585dae6d9322. 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/UKLVE2401458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259289254c5873d0e3e0ef923a7af41094e26653cdd58fcad068da910f3836ae. 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/UKLVE2401459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7592abbeae5310c9b57077f5fb640808f5e5d393924772abf89070ce2f6474. 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/UKLVE2401460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf7963932bf64411cf7f716e10380b61a3144af5c2e6490c211751a87288a52. 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/UKLVE2401461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d46883cbc1875b68b1e6763f0e118c977725f503f299641008a11b1aba5ecd. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BC7F22400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe250eab1a38c8dc170a035033a0bdb9ad02178f53e2031c734402c9df1660bbb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEW872307566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9fef8636420058b31a20b49678373541cc9ed3a6472011cbd6680803f22677. 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/DEW872307568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf400f909a2a6cb0a4627db66fbb2ad966561a23b17226010ee323abdc88d4315. 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/FR10S2372966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267e50833493cda19a009e95bea149b480971f4c96ed06bff481e0e0bfcc791d. 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/FR10S2372967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352cecf58635817c70f30e613c29cf35fc0adcb97c3af53a3de16a2dac663bf7. 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/GBKQU2241274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf684b1a68d0bb3d8d575abf05a46675e9f655a974cc015d978c4cf85dc3d472e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2388878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4530429c73775d10b4e5d3c43b119e1eb8707e85091ead7252040fa05c6af0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2190685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de2a0825369da63a81bb124d1e06d8c30a590543c7b3ab81a4f54dc539353a8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEW872205883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64df1d15338114c60572000724df6a3e8a688b5ffdc5a00b2d054fd8016a4386. 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/DEW872205884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c019e50b11d80dde856579ddea6b83829688a7b96b1dc1878f3a74ba9480449. 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/CH6542343799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea5fd2dd66a8b7db1ee7633071f96573e0ebf48a070baf5cea91af07c6fa908. 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/CH6542343800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d5f162ee0b45b7529941362776f0138822248b448a29241ab3100ca01b2279. 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/CH6542343801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb37472548b479150899557cf293aafe248e5186f3eaaeb622cfb78f3d15ce83. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6542343802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e60ca989e9c15f0565d9e1aedbc68782ff12ba309ffc4bda1f0387248e5fa8. 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/GBKQU2223088.
Nothing But... Funky House Grooves, Vol. 20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca594941b1552174ca4d524dbe25c0c25be6dfc50c809f2ff3f55c9f4d30a7e. 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/GBJTR1800069.
Toolroom Radio EP711 - Presented by Mark Knight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6688f34da3cf1073a14264bd10f14cca5d4f65b3a8af3db0a80e3851e8a9b94. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBJAJ2301451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48612844b2936d1ef80494dfa14ca13379e8f55de45d7c880a7e590bc4c2eb85. 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/CA5KR2388879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b119291e31c555191f956f23f9fc8b1abf7752b41979da465d283087a5c0d62. 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/GBJAJ2301460.
Nothing But... Afro House Selections, Vol. 16
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11b5a1842fd14cc5451c6e5634cb8565f623567a0e2237fd9bca8b753534e39. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ZAS2S2100151.
Nothing But... Afro House Selections, Vol. 06
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850c795cf67f61df44c20318f8eb93a89f69757d055480f89020b24953e19c28. 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/DEW872206357.
Latino Club Workout 2023 - Aerobic, Fitness & Fun
House Boutique, Vol. 28: Funky & Uplifting House Tunes