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 0x56048500c1de3b7b85b97aa87f0b9943752563adba26b160b97d925b3313ff54. 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/8005d7d5-aac7-4f17-bc39-1b626fe7b819.json and https://artists.proofprofile.net/proofs/artist/8005d7d5-aac7-4f17-bc39-1b626fe7b819.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 0xf618e682318f723f730d872dd5deab1e6b54eddafb56aa4857bd9feb56e34353. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/SE6I32137038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf292acee592982b939297371320bfb29ca7db359164b344a0887449452f41b8d. 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/QM38F2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66491d29c7becf95c75d8eabb7cfad014dbaa48b0cf1cdfbf82fc03906b40a3d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SGB502251538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4cb3c978d9a700fb155214c0376b29632886cba7ef05b15688b2c2811db425. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SGB502251537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4b0fe88bb4d33cf75961e7ac20d00c4bf4f50d7ab4ed9e26de64db0efa4c27. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SGB502384562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef343b8380624ad7b42d36e9bc1e660219e815c42f6fc7adfd204217880b7676. 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/SGB502384560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab65141eabead69d70491bd13b68f8a100e5e47803c5d8b8c90aff719828f85. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUYG1505097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab65141eabead69d70491bd13b68f8a100e5e47803c5d8b8c90aff719828f85. 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/USUYG1505097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2700e731bd8e4289e73687d813ca626ec13ed7f74649231e3bf282b18c89a5. 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/USUYG1505098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba7c7053e3ae9ac9554b77069e2b8cce2dcd1e59f506a91bfd1ae7ef2b7f461. 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/USUYG1501141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6840a4baa9346f06086c17874c40afa43641cc9e2509832056613520bd68946f. 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/USUYG1505099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3238a66d58d867b06b545f886b45ac284c83f3d9afbd247a2e876524d86dbed0. 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/USUYG1505100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522e43bf45e34d3f7894c9e18b1b3fe13ff01df13fabd60d79a3c767af4e8884. 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/USUYG1505101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abdfc30ce60b286d8a2c0511b259960d33f872e93e6544da6a9f8a9f613ce72. 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/USUYG1505102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643f274b6b4ebf87d92f37056c7f6627c1fa93620d58ca80b8c84ada54236778. 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/USUYG1505103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ec7055e2f3517550b802cb561885df4863ced7958006582f9a2dcb3d43cf65. 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/USUYG1505104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca45912440a076f68f7c0d1328840606ee213529a754df7994fbb677f1191783. 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/QM4TW2493413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca45912440a076f68f7c0d1328840606ee213529a754df7994fbb677f1191783. 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/QM4TW2493413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68e549b00d0d359d1cd0bfc3950ee451079d3c657bdc5631729b9f2bf081a17. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QM4TW2493415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f62ec572ea148014bc563d8ebe491bb3cf39e1044b8ee7ea4a218dcfa085f45. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM4TW2493412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085db967bfa1d8f4b1316df9a99266b5f80064e15989ff9b31d630743bf8f9ba. 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/QZQAY2450859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f4c3e069ea30473c1ae74a31abafb21d117fb4d14ac882f8231c133c9907c7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS7J2423811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae2a0d8d3bf7ecd9df9272d6080d44da9a862182328bbeeb6b005b60a4a169f. 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/QZS7J2472387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085db967bfa1d8f4b1316df9a99266b5f80064e15989ff9b31d630743bf8f9ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZQAY2450859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a303d76b7cdd1727589053d34c91284a373a74452965d7b60a8ec279a7cb39. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTLA2405903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f4c3e069ea30473c1ae74a31abafb21d117fb4d14ac882f8231c133c9907c7. 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/QZS7J2423811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe23921d06d6d8d20dccdba91833e207faad1d283e4c8adf1b71eeaf4aa8a6e. 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/QZS7J2415720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffc68ce16ab6f7a1bd7c8a68e518d34854b9dd50f43ace8f35b39b7110a30c3. 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/QZS7J2446909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2fed1fdc56cd0662a24cde00b172b03291b75642305035acab3efb35fbab46. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZS7J2482581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda3dfb8f7a4cfa964d4047c03f47be9dff1c011c4f0b596f87c0c1b1e6115ca. 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/QZS7J2488594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3747b182f4b2c1d56c5e00862347bd2d36fb69fae5d987064c9c82b1f337b8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZS7J2481963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75790106a347856838320da329a4ad53a862a7b88433497f86a14856ea04b975. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:52Z), 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/QMFME2414693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75790106a347856838320da329a4ad53a862a7b88433497f86a14856ea04b975. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMFME2414693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75790106a347856838320da329a4ad53a862a7b88433497f86a14856ea04b975. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QMFME2414693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53afc13e33933d98ffc5ac3947b95974f81b00672615b583d114620456011fd2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QMFME2414698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569424042f8891b657606bb43bb99b862f9c845c8643e75a1b0883e1bce2f888. 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/QM4TW2477162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf292acee592982b939297371320bfb29ca7db359164b344a0887449452f41b8d. 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/QM38F2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefbe615db56df7696fd7585fd23827cc31e61c52f6d990ffb29b81d0bfc36fe. 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/GBAAP2400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dedde2bc0dc8a9224c2d263f3dfe3ce7172ed23fe627a422db8cdf572bd1c63. 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/USYBL2202048.