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 0xb2b8f6ec89a0d8d5b7f2d5455e6c8b3a18430b535690670f8b4d193f58083214. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36e58de4-515a-4ce3-94de-2837e21b27c4.json and https://artists.proofprofile.net/proofs/artist/36e58de4-515a-4ce3-94de-2837e21b27c4.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 0xa85672a1c3d3d7828855a4f70a078f98ea229a490752d4d7df79c2c8ba910713. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBGLW2401194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6e8f6331e22e62a2f2b2cf35d7aed0ec01aeebea33696bf43af5a4b685dc73. 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/GBGLW2401195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85adf6df3811c9b70bed037b733a087071388c9ecef2d945f6270a5a4fcdfe1. 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/GBGLW2401115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29412bff3676b13a28f72387d9c8e555084b5eee001973a1ea01741766a609e0. 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/GBGLW2401019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0046e1b388381a5cecdf4f998db561aa246f7d34b1e5189b6f428dcb1c5ff5. 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/GBGLW2300755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526978eb3eb2cbf5033c8beaa2d4defcd92060a2472d936ff7e1717b85456081. 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/GBGLW2400498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8102eee6210ec9ae62977229e9afc6a8edb39a31a237c875f324e4b79f22aa. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/GBGLW2400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf675ac977a6a49508f5774443f0bc8962aeb658760cc153a1515ddb667d17a7e. 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/GBGLW2400445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151f72fa1d88f848125535fc7566411e8d19d3c113280d684379c52ecffdc4c5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBGLW2400367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a185eee6b34270da70b78951eae6f15b215b375a88969d6261bb1fc4ae3330. 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/GBGLW2400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be5acb4c7ccb95bc80886a1df08c115c4026c383dcabb271e1b8c98524a3566. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBGLW2301275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf826158ce7e094efcf77619d373ec4f42d5ba0066b561d4a142ed247918dd36d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBGLW2301273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce48b122d0805a08bd6d97a7e999db8e6793a6325b95abf0c2642ac87e85cab. 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/GBGLW2301274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c4f5a91c6bf9abdce4a4c75ca5de79d7cc46de43c6863b43b446b3badb4f1c. 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/GBGLW2301202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ccf6cfbb2b95d637f60eb53d15610790e0026ee5b332a6d12b658cab278a4b. 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/GBGLW2300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd720544204e4f772b2dbbc23865330bc217e93909c2caba72b17c0f48a87a99d. 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/GBGLW2300291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eca95719177b92308f1dbc0f7df3164c5a32e32e3a6898d868d75f9d1769254. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/GBGLW2300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fcccfe04968cf95b7f3fe76936f3c2086fa381982057da043cd17557a1effa. 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/GBGLW2201038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe048ba39d58b99b8af2f8fbc30c26e7e117a0162bac8d2a01e6bedf17f99f91. 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/GBGLW2201039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bc9c83042751e14c24d8931f6e995b895916172ec48891b26d2916dcc81cb9. 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/GBGLW2201037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac812eb79048203363bf5147dfa25f0042159ee91a9c175983a845fd1460562. 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/GBGLW2200825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b9256ac604c7c5303495d00730f7872813c43ab2cf68d2935887ff589aa861. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBGLW2200826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b29db59883f468411112c5d90e1162fe2352be9536d2ff266673147dd4bc9e6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBGLW2200827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2b353ccf72c4c59458f4e51c60fd37b22ed428ac20a9144506772e957b21fa. 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/GBGLW2200770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bb60bdb464101a0e2818efe943addd63c7f77c983dc34309c34d51759389ae. 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/USNRS2443534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb1335dd22e1a75f6091b9c5b0d9347ce1caf1de3397dff1a589445ecf25d0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USNRS2443535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b05ddbdcd63214e4cea0e882222cf7d3958ab1521e2e9a716d3d7caec0bb28. 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/USNRS2443536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb718468977cff26b71fd76d3e9a97d66ea9b9801ba9a71619578b18f801ecb9a. 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/USNRS2443537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea7e5ead87429ad75c75c1ef379d511a39ed90b4054d1750a1db4a5d3890144. 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/USNRS2443538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00a72d2ab67363dd3d1d3a946958d5b65978f25ff3656c4fbbdbdc38c70e83c. 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/USNRS2443539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e11944bb74485a079a338126c21e5e40680cc5366f3bb70c457ad2c242603f. 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/USNRS2443540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb759fd00eb7a9e9ea1850d415ba944576df4a44b5b1055eeab9aa4245a5274d. 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/USNRS2443541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dfec62160daec1e267b73c8c1219f192c31ea043517583529fc9466c73d38f. 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/USNRS2443542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5e3183ac6880ae7ada3936a5d772763a66ee56d6bdb67385b0703c69d62ef7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USNRS2443543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de6aafaa7422ffb9783f1d24daa8f2765b4d6f8adecd352223e9636b8eeb213. 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/USNRS2443544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449844adb1d4943dd42889eb5fe784bd9e3c0ae00d0ddf88646586c088b98808. 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/USNRS2443545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2194868de1352e6fce32fbd02caa32bac42377753bb6191ff33552142650ce10. 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/USNRS2443546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ba37335d5f7a3ba147884718ab9069c0c198be122963016343030d74783ea2. 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/USNRS2443548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f9480e755b02706dfdc4fe1af1513eee7dee139d8f5ad0320a3097e5df8177. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USNRS2443549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4eda0966f2e2eee87a55d8335298516fe24a6c89440cc32f65903108041748. 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/USNRS2443550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2b3e2f6e1c6ebabe44b67a4ca071a117aca316b2d3b59f05b0e6aa353c666a. 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/USNRS2443551.