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 0xca10b5593119a601e8da3086b04bb51fdd0b223a52bf4d085992e084b800324e. 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/6e69283d-d125-42bf-b243-38b4cea59883.json and https://artists.proofprofile.net/proofs/artist/6e69283d-d125-42bf-b243-38b4cea59883.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 0xb10865394e94a6e87c44bd4840c8bd2f92d7dd914c43f65f84b25f955ce4d1d7. 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/GX89G2308960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a75317e76480509b0755136c664818510216e0173a1da1fa104d8fe7fcb0d4e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX89G2248564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c63dbb39da0e0091631785898ca865c66163abdd19197edc7c5e8b26b7ec51c. 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/GBSMU8477461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe088de2c378684abc7d6f498cb6e230bc49a3eb05979785eecb8340b2806da87. 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/QZS652333546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf82c2b3535c435dd0832526fd44e376067260303f873bc4901913dcce9971c5. 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/GX8LD2364042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701adb31a38a6905c52b39a187dc06797d77548e3fdd5dc6bee69e217cb218f1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UKZGC2301486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c12fa92224eeb0956980b6f13f627509c21a6652ee12f06f44d4a362bf28840. 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/GX8KD2259815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fffbb6fd78ccd0fafab7b31938357bbc6be16764b559002d71ac5a6a9f41e6. 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/GX5MY2259516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fd42a4e799f5931f24da51bcb17005a63bcab639c175586b87bb6cb6450f03. 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/SE6SA2294589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32285ce2331d885e1cf47f65f28224f4559db8a86a76736dbf7f0f44d8fe2ea. 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/QZMHK2247986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc49b5d6b76f29784ef64f7fad12d12184598595d769387d6c0691fab1a93c9. 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/TCAGE2279345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a1e0779dfa6c905c5c325b6f6cbe0d81ebfeb5ef740882046e73458756b632. 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/USA2P2206495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ab683d41d466c3a97d990d85d6ff7a087caa095b774365b92c87db7bba8d46. 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/QM42K2203755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c4618ce061847301ac6ef64006232e5cea3374b3b7e536ab0faf8547b9dcc3. 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/SE5752268323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06955671a003a134aa179fbb13ce500b70d8eba1244f400ce3ec585583aa515. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GX38U2243515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe485e75052629183c0938344787e699357710a3d4f88766ee3e0562b8a3255f9. 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/QM42K2213387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace7b8a760dbaf3a7a2084ec4a24983a060d5a3846bdd8a8409b1c8e73078acd. 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/GBKQU2204623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1b0a38ce19f7a15690bd4545a2f532e348170180c4847ea7cce0cad1dbf3e2. 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/GX5MX2140661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b62179c5658d36d1904f3768ad9e3447dffc4346ae3fddbbea65d85dbacadc. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USA2P2134187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b6622e0113aec300f839f49c4008927913ec2b20d55b624768c91fc5ccb1e. 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/USA2P2131475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fe9cf4ca3e64b5b35c9bebc657c3fdb1a868ddcccb72c4a44b5e587af4934f. 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/QZMHL2061320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba74b93a19b319872be8d3bb60569bdee30dc84b568ebe8b1f360781d28546f. 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/GX4R52103542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02daa045ba0706894b233f2e89c55c795f213c86fb7656eb9f809f1404cecc1. 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/USA2P2120014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413d811d6d01059b3e18319757f30eb2281f88e1bbdd8db70800e91a52a39668. 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/QZMHM2086008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e465e575dea47cb01dc78a83b353682f613a2e1dcd44d61184771608e2b9560. 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/SE6I32121804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14362fcf2be78b3df110ed9b11ec79600c4de7d5f214f1994d92b7a601009e70. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/GBSMU9126691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c71d5ad1cc9c31525fde2bbbfcb527112df1e2b42cc6d31b8e829d028870fb. 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/QZMHM2055818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8453233713dc5a419c277a3db00e0cbdbed735eebc968d57ae0d7c3cbb57a0fc. 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/QM42K1999402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c8874f8c853ac52ca9182aabb34681be0f1d7aea9a62c3e302a30a2685873f. 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/GBSMU8482437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a25f8963a0af85e40da6ab20d49295f46d7d71f1dc27fd48dd492f04d31b73. 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/TCAEX2069174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c752c4e9a3265eeb18076c58095cb4bd67638837547ddbb276dc432bafa5181. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBSMU8457366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607d8eec7c548cfe0d0fd4d6f988aeb082c905e717fb6ebb64ecb2d659141017. 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/QM24S2107370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72282976fcabe76e5182a0a1e346d8745d3a87d2095fc037b73fef9eb866747a. 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/TCAER2076588.