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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fa076a2238c5a30d9ae5f74f95d63ea84a68b2e83a0f9fa78709ebb304b1e2. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a37f1fee-cadd-4552-954c-37e280466d88.json and https://artists.proofprofile.net/proofs/artist/a37f1fee-cadd-4552-954c-37e280466d88.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd695b59967beec6ad2a6b39cecab170aa4b6d10ad36d9229aee34183f4426835. 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/USDY42366103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefde303479f643f94acc539e691ad6a5d648ecfa197b373368ac37df6b8b16f. 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/USDY42366104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1923940f6288b13a9665362c3bf0f6325175c1a166f78c69fd8b21ce67111435. 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/USDY42366105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b43fb645d07c0d69278782b50521cc24328980770ae7044902a2ee194ff5a3. 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/USDY42366106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6ca877002a032d8cd9e573776ce699be64826409ec295657f12630435a5e88. 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/USDY42366101.
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 0xa2c374e9e6380ba715000de42386429d811b508ed9ed7e43e9043c16cc8f16d2. 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/USDY42366102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ce90e0fda72a34a34ee9ffaaa117d02e3211cb08e88d96f0cece6eb7433e08. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USDY42366107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6ce98377b8de486c59eb98e3fe55732b688cbfc128b5c820405c4e2d440843. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USDY42366108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d1e094bf56691706f1aa970079c52851fdd05a29ee265cbd57d80bfdd531c8. 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/TCAEB1964827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa7a70b13e019e9b1910fc76b6278e392a9fc71213d326ec40f109c9f2f49b1. 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/TCAEB1964837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebba89db7b5e2299caca2ec579b8209b14d66af895bf18841ea2fa17fc4e0c8. 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/TCAEB1964840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189262c77bb82256f44b41fece52c3340faeea70c037e53004e8158bd2acd5f9. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:03:18Z), 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/TCAEB1964853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e309162ac5176a6728e01176d14114ddba4c394a8a8586725c045f495cf3b7. 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/TCAEB1964860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf2ac7096e5da587efcdba5cd326043a06cd019c6f994801d9821f3173beccb. 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/TCAEB1964864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a543ee7d30ec2c8ffe4bfbb0d678c7c4572794ccbe60b33fdaf86dee3b33ece. 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/TCAEB1964876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec1fbfb9e2c69727d4673cb88950778f14d799f4352672b6c443063223542d1. 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/TCAEB1964829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95151b0d17fbd822f9be7992ad9adfa6aad8f4342aa3fe840e15e72b2c1056e2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAEB1964842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5da9d26c1c77457aab605d98370c6c5ffe0e7ff00368daf56d8eb1941c3d06. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAEB1964851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03050d3733538371af4321ea5213e9ca12df9f8eab9ef0ef56d72812655d928f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCAEB1964874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefb425eb49aaf8fd32cd2904286fb08fd7bdfd6a2fa2c251b7396577f71dc91. 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/USLF11300602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa822acbd9293907280aa3b3b079943391a1f8e079fb885674463e54dd8ce0852. 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/USLF11300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c968f09f5fe9d98afb2d09963effb2459f9550ed348cee0ec6f1e597bb96391. 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/USLF11300604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f4727f5d2a2d50e8da48561c1ab19d346a3a8f445917b47d88bc29ba33d167. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USLF11300605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fff537b3b6cb729d5be5c93f88114eb6f8514836f3397281f3478ee4ea2f09. 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/USLF11300606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ada4b58fdfae8f5374f0908910638e6b2e0edabdc95055645cb8f1e9dbe771d. 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/USLF11300607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d110297d000b5fac084dd06026d24a697f94765621b514101e410953a5bcac6. 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/USLF11300608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed592584976bda80303234eaab7d2697e92f642c5e52e2a5d63b995a058ddd1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USLF11300609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc35c6b7e1b1dbd5428a863229d725e5e02edc0237df26dc9a7d0f7e846f414e. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USLF11300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d24e5711a45671a615d88469b3be95f3fae2b89960576eaec885fb87e4b5f8. 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/USLF11300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b622e375e0e055f85cdd57616fa29c7bb9f4b85117a6ba8c69997066091a36. 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/USL4Q2428296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32128e2a8d5b015d3969c230e61e039c7619e01ba00c0dbf33bd3fbb795c7633. 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/CHG332400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4b17427fcf147a75d601f0afc71c355db6c65c29db87730aed4edd56662a0f. 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/USHM92227582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c95efd644b394dcfffeea3d339c11dc4eac991ae39bad3531f37353663f1bf6. 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/USHM92227583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b82527d8d121b3c0f2a6437db423ac7faaf10eca1a916d104d533ce5c2bd2ab. 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/USHM92227584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d10e569643e9fea90c19ba70b8046aecb10f4dcdab5adb7984f3e0ba63e455. 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/GBMA21987462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfde6ef88f1b3437dee4525abedddfc2e26d6ee64e1d3604572395eb12bebe01. 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/USCGH2188177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6f0ec1841e89863b7709d3091a169bc817864cc8d1b0b10f204d48d7028c23. 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/USCGJ2376385.