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 0x78b5cac2541037f90fcadf9e1b88ff7c811139cd9c91ace0c22f9fe565ab9e75. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11af3375-45c9-4bdd-b3f4-da4d4aefc437.json and https://artists.proofprofile.net/proofs/artist/11af3375-45c9-4bdd-b3f4-da4d4aefc437.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xcba687749370e8865b3263a856060bbd973c8307e950dbf08832a254d05796e1. 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/QZTAS2213688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b0a59cb1ced345ae379027ec5d22fcfde80a9d695c40adddd854c50056165d. 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/QZTAS2213689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9190155d80c0239c1a575da321b04d70fb46f9d1b4b7632cfcd6d7d4de954d3e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZTAS2213690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2177c4d46b6811872cfe1f497e5c0f00fa88f95ff5242a8b275e9a1c12a1e997. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAS2213691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9299d7378c90308b878506135ac3acacf508131f401a398ca3a1e166cb1fe777. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAS2213692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7605dc2fe74c7d34bd9d4e3c04f1ef8969f47571c37c88b730219d6d28b2a7bb. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZTAS2213693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93622750389fa63e97dcefdd0e46c16615b30e7ea35a1ee324e4b789aecc39c9. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZTAS2213694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05d1c49e53faf95b677e4545deb06c38ae89bbe855f560162a6a2aa586b26a2. 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/QZTAS2213695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce7a042df759caf5b8c7d656018af8c0288af71c869785ab7cd0c8ffa77a075. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZTAS2213696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c3738d5944b099a6285fe51a6df1ddf74155524445a0cd5664cffb88f267b0. 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/QZTAS2213697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdd31c665b2ee6c03a7f1d76e0e9a09c814d690b35377230b7a27d0d4edbc15. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6F2455169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e16fc727c822225929a14719f187dcd76151830aac14aa618c16097431ace9b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES62440626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf069cbb294eb3028eb9b8c47f362ac357bfadbe95e84e83c94353f21fffe5c. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZES62440627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112ec62c82c42964b7fdaf0d2081a83901adf3395a8868cb0994d69d4d050eaf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES62440633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba47b1fee313e4912f07d63c9620028d719d96ccadc7426dce723ee3b444ce5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES62440634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae21d731c9bb9acacca6f952cc5083a3e352df20f3c535a7bfece7329268905. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZES62440636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dd1e08abb58295280d450b9bc05a01377f4cdee3344c8d6feb82278ee04cd7. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZES62440638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616c12679367b247c65cfa9834b674380a9f07375c4bf779a902cab7600aac63. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES62440639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0cb3906127bdb425fa10dea448f8bdf96a9548cf754029000d527984fd34ad. 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/QZES62440640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2573031dcb65097857118b4c1adf059e88301eec804665592b789905c3b8b62. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZES62440641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eef0116598591738c7cc479d7f75fb1842709493d607ec6f2e35b7a8ce5000. 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/QZES62440642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818daec4a8abcf08c3cffe5bdb8f164de7628e0eccf6ce68b40673d957059ab9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES62440643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24fb0a5866f3b7901066502a68369e2ae5fdf8949d53f113e9768e7988f3d59. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES62440645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8234d522a9e52d4cb862f6282429ccc6341cfb719f94892b808f23ff9e946e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES62440649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adcf806dc253eb8ca164be7658ba46ca12ff5d7cd1ab08b21dabf49e693ffa2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES62440650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eddb51ccb5664eb0911a20b1d7e9bfa98ff63f296ed8770656168631fa84fc7. 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/QZES62440651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49a23d54bb48332d4b9ee48e8b1bbcd1b8cd986ec43408574842b2c1987a99e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES62440653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00449f2447ba35ebc2ab724a82a84f05c98580c4690430d151b4c945a5de7975. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES62440654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac52406901d2878f95f91f01cbf78bf830d8cc907fe62c8ce9e2901fbf453ce7. 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/QZNWZ2265516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de75f793f7449b4d5507bf2df734637af311633d81f71a2b46d6863f9433bbc. 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/QZPLR2284017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065e772cbcf0b301f4b7433ecd768ca575e819b6b54309e37b9b9669b5d81ecf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPLR2253510.