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 0xefbaa38da9be3c1cbb24b57a78548203df4c8a72d37b2cfc4fd8c29c51747676. 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/8de2bdbb-c064-4e53-896b-41899c897a37.json and https://artists.proofprofile.net/proofs/artist/8de2bdbb-c064-4e53-896b-41899c897a37.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 0x48a601c8dd34009e6da6d25fb0f84bc75785382a41a402be988f280c3cffddeb. 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/QZK6G2512443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d81fd4ef70535ae3ccf9441aedada2cc0d8a4a80f71cc24a59ce73074fdab2. 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/QZK6N2557123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c3d88b77d78b19fcc64542ce1c84a213bba5f34d48f71c201cf3e1cc75ec50. 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/QZZ7M2469922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63e9126e3407a61668f53cfe9d53668fca3bd800ce0422a2e0394e833dd2f95. 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/QZWFP2474038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d848bd7658e35a388ada846b74a8032c4f0777509cc8292538b47a671280c4. 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/QZWFJ2476293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462b749ae94a0e617151e94b9d4e0d24d3f8aa7749b64c4771694e4311f6d90d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES72467874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d603da73f3509f428dbf2da9a5696be36008c5ae28b43fdad70a46c6b514a. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZDA42411944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7472d554bb004121103994e14a8ad368bd4ca2de15002f001055f4862226482a. 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/QZTBD2324514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6813fb3256be505fac48bb6975d2671cfb06e8c01fa9424dcb7f4103978d978. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZTBA2371026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e98b867fb6a18a5167ff071e7b5f78f0a3a4d41d45f079899999eb32c4052ea. 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/QZTB42305177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6f7defb6afe7f80f33862807c10dede6a05068330c52c52431f7c871d02027. 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/QZTAY2391585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f3553137aefff81ab7b8a9056dbbbbaeb92342632091fd8c66d94bf80e9ead. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNWZ2313363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc109eec928c99a0f16eed561cd5d445f772b4ad038600037d701e6edd34163f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZK6L2381765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208ef7230a4ae5e4587400914a4a228d2d34a0bfff00f24e54f6bfeeaf161d81. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZHN72371275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae2f4c2cb3f9f4c2dfa014e9d45005f31f369ec98e202961cc6dd2450fd3b1f. 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/QZES82302598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fdb1e93398e51fb1c1859f62acb8de2ab4a689ee3ee78edc22682d0c9f95b4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZFZ62391555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7491a3da9f6e24640d07338844bf954da53dd594682d0d7bf7bcf53343cd315d. 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/QZFZ22391819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f5adba6c32981531c7a95f69ee2a49880190d3cd6d85db9e91db25b64ea588. 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/QZFYZ2328198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec347a656d5ff009fdeafb1238d73b9721c522a57e57bbdbc89db795d4d063c5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZFYX2326559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede6d22882697e72bc32343740ce700c5defc88fc2e1dbe4aa86c5bc7122cafe. 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/QZTB92288038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230d5b543b54593bf1e294c3235fde511b03ed5660a96cdb144ed3a7cafab2f0. 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/QZTAS2285571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942e13f247bd5a054aea59669338feeb903ebc22c508baceee264619353bb222. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZRP42229181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fb54488c1d7134b9e1a21f829a36358ffe370d9ec307df42a857d263408385. 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/QZNWT2210896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d529c996ed139aa1e92c179270a6388ef687a417d14351712574a27f57b6fa. 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/QZNWQ2259085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b97b47e60a8c64e2466c15e287d94480b00ba3cd38092a57355d0944acfd59. 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/QZK6K2242715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d7e10c683b77b2812c2347aa76cb36ebfae4fc38bb68f28a27984f30ec91bb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZK6N2282076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6efe6771f7e85c9eb79351101f99981b2a466e8dcc1f9d9c19885aa5930367. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZHNB2282992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3221ad169f49fc600f128b00f8d2e23961226b2404a97c7016d07005ff7160. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZHN92264280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e3535d4af807dd961a011fa12780ba8105265bbcd0c86d89280285b4151d51. 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/QZES52203180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b39117ae618ba8fa69fd93d933a2d28eb957ca5b7db7b61a1c0dff555d7909. 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/QZNWQ2143766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd663bb000f71a8c4d2eda0eb854fc2a85a5738fc0c2e32586f95db7cf9de4ac8. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZNWQ2155573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1458406cf0be468dd48f01b31d40e67af313896d3e7700c429b2e7068c6aa077. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNWU2186964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec1af793421143f715642cc1196edfc8d1f11edf4bb40adb99ae0ba5cbe3aa3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNWQ2143767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a7fba769e0c02be1c0bf161146aed5d6247b5c12d8f7c7181a6ccd80abeb1a. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNWX2122735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14205de995ad58c4398993d0342ee65fdd7537e295bbc208bd733d90c2fa6d6a. 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/QZNWQ2143768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13c626b47bbbf2969c1afe4027c741d227d7b056fc2fab0b2691e4a8f410c45. 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/QZNWQ2154639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa33bab910b924754589eca47ea4f18c703f8277c1b484b2542d9ffbec7d5d3d. 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/QZTAS2178058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eedcfb334736349cad1fdd8cf707d88c0457562ddce3b13c070dc0179e430a0. 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/QZNWZ2199646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9ebc9c4858f3c393e3ec8299b5900e89d59d04d1032f889c8be44f2e2654bd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZPLR2109961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c5a9e4133c95cfabcb20f4b12e8c73a7745fd3855d3abffee917a54d937fb2. 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/QZFZ32225311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ba07ec039f783a79ac0b74a5b4099f52100a3c05d4950db06427695e5522bf. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZFZ72328506.