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 0x7c3ac92994b7c79ebd39122ce62d6209a675d964ef50bd797d3845983adef19e. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52b43f67-5916-47c4-971d-496552ab8edb.json and https://artists.proofprofile.net/proofs/artist/52b43f67-5916-47c4-971d-496552ab8edb.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 0x0bde769d9d86b2526163c99b6680c0bf30e16e8c41079a071b0044b23a324e7f. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/AUNGV1700479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc94f35a2416b9b962a0801b7b5d729c01db221ad7ce5e1ba730ec37f950fc67. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/AUNGV1700481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a9ca972be06883081f2189bf0f2a10d80ab817ef02c3dc7fc46ea93af9ca81. 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/AUNGV1700483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a01b3370aa3bfa87525f0eabc63cf2e45169cb9b4c993f7f77ded5b590f62a9. 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/AUNGV1700486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be363666c1851ae836884446dcdf58499c755605796ef305a7c68df14fad314. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/AUNGV1700492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a43e0819f135baf7014b946681292d3d3f0bd261af1b37e2b3b8bcd38e759b. 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/AUNGV1700494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfac9932ed9b1a5bcc5d8c463f450ebaaad9018ff001b053baeb173df0b238a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/AUNGV1700495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c5d833ae2770e3555e1f6a4a543362d2d37f3a127b18bac8a50a82a2cbb165. 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/AUNGV1700497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec72bbcce7e3f81788fc3512683f56748f1e91d4bde1189b5841c6b1fbcf281. 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/AUNGV1700498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9ba77b3e97c8586c1c4c6aba2eed6e6fac30c15b3707a02e1dd67af34caba0. 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/AUNGV1700499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fee6c04563953d29514fa06affae58861c9d36d822bc5fa1d74f4116f100f9. 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/AUNGV1700500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6459b46b415b331e504dbad818cde153e9cf80458bf7370406b0b5cfd157cccd. 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/AUNGV1700501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74221fcee93269c05df176df5a7fd5bf6489040cfc5b3c5e1422675824fd6418. 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/AUNGV1700504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bb41551515d852187bcceff8da8c6fa8ecef07157718ba7033e1fa4842bae8. 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/AUNGV1700597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1eb56963cff514dfde27ff95d64a49ad687bafeaa9f1d92b79dd072c4790ea. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/AUNGV1700599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67c76cd1631b10ffbfe6a204f54e5f2535423217ccd6fdc3ab033f233c9ccf8. 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/AUNGV1700604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dc14040895572eb90a4d1cdb6eac7b42dbaeb316926377108ee19181de1684. 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/AUNGV1700606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdbbfbae407fe2e177120bb4dffc20843262597a174f986fbb2e6d55143a81e. 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/AUNGV1700607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cebe90a52cf1187ffd89f5fd17dcd959959bc81824b5fe36904e6e582683d9d. 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/AUNGV1700608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc9f0d3e1c07aa19e95ee69aec4ca192b69b2516e6834a088a5b86dc25762d1. 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/AUNGV1700610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b64aa5a4578e4a7662cba55ff2d45e0b58575a27cee017cd094e245b9be693. 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/AUNGV1700613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be0aded42a653ae5b04e30e5adf53f2a1bcb49a5646cdaefa20ed869b3066ba. 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/AUNGV1700614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59e2d5234d8be240f50c07c4f1fb1fb01522333dd5427ad44e7619a581e319d. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/AUNGV1700616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922e8771417ec6defb5311c2a329e5bcad5f65499e17e3d976aa65467c4bea62. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/AUNGV1700646.