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 0x06fa55cfe2f3e125197fce54d578c9c2589555b61c2aba61bdc3d07559429e45. 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/702eb1e6-9a44-4ed5-9a2d-404a26860539.json and https://artists.proofprofile.net/proofs/artist/702eb1e6-9a44-4ed5-9a2d-404a26860539.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 0x40d09a77ed3d079a131c27f436710a6cac00b5fe7b9437b47f39bc32d0bc9510. 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/QZNWS2356049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2534fd9d2dbe12c5a9941daa85aa364cf640cf11341de68568774c048a47acb4. 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/AUMEV2283970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2344ccfa8bd4a1dae1bf38c93bd0063eb3176a21485b1a1e54b9536d267b9ba6. 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/AUMEV2240621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8221e115fa2d16c0495d40430662ddc8f6aea1f588166645e4a5eb7ce6acb9a. 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/AUMEV2466911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b6c55cbd82fb6a21012f5661a8eed029d77bb512016d79bda5887d0e3a20ab. 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/AUMEV2437054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c62cd7f974b06eaecd989f5c8da4fab284a30f7d3f45fb276f33f217151fb3c. 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/AUMEV2448850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa742fc0518ef41a4ead3319ca4fa4b5939b538fa641448c25873b6ef6bcc66. 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/AUMEV2433185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac907a40b766e2f3088897ce4a4c9ec7d92e8ea5ace29689f7ca753fd31f2f71. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN32456388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4880b64f143e67a14dbd8d7bb16733ee56a1b06a7901ccb43b36e63fac346459. 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/AUMEV2427416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f6762bdb89df8de216843ad28c294488142c5d973ad3d579cbe56c1e239e9a. 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/AUMEV2413358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417de7fd4922a13e3b21b32f3fd08f6678fa1932fcfe57e1460bd79183bb99a4. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NL4WT2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a71f2085959d225ec217cf31e01b61228497abd30762cb91f334ef067d4bcf. 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/AUGBT2352317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa157b14137836f83c26852c61d9fb16bcb770490f5e6725b6a4bea2d9f42547f. 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/AUGBT2337886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0e1a25c5112df3510370a4e1f00d8a61abc0b171e0efb4fa2725c6ec600bf1. 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/AUGBT2310862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8e982c655a5da152b46a89c9d5b097f507b70bdde274bb706490567d769d0a. 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/AUGBT2304430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb540ffebf1aed02f7f20833277d0bca98431dfbdedc725e3755a91c77ba75a5. 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/AUMEV2370256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c846210ece4a3258375f05705751073e23bec20d7da11f945d8d97bc9867e. 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/AUMEV2367169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d95310a7480e96d949cc43abfeafcede6ac21202632770385a70e0a2c771ba. 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/AUMEV2346341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb601e2160dfed17e98dff1c269dcbc72e7e73c99a0773c5e7bfa3a6122b867. 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/AUMEV2331387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39c37a94710b557a1fdd803658d6b70e040e890c3ccd6d15f7eb4d934bca82e. 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/AUMEV2311710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e52c86bcb458bd4fa7ace4759396b729f8b9644f0f6c259fade00d309ee9f53. 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/AUMEV2306702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf81e711924bbe05418f0b3d49e23deaf250c5ef76db0167508b83d9f5fb50c6. 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/AUGBT2240370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60516417be76c3ef635de1e8ab03bc6c5755915ce331c543ee137b905db96b83. 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/AUGBT2235589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71e07a97d2a4250fec87c3a0c7d581227c63e26281c728b617344843bfd2902. 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/AUGBT2220850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa13b6f6bea56b92d09fb446ffb597f44c80e2c59c6a07a407c10a86fbb74e6. 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/QZPLS2284701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af52445304c5fa35117f29de8996fadcb5945e9ec6004525050c773e9351c8f. 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/AUGBT2201131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdba40e62ff58aa947943f2eb5f01541dd15cf7550d89db1feaa5b0b3cea57fd. 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/AUMEV2275935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a1b935664f572fe869debd320f24ae87a6c38e8c10a2c29d7cf07a109190e8. 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/AUMEV2259827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ecf99325f4fe9772e5655a62e2ea376e229988783fc077135a0ba77a2197fd. 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/AUMEV2258377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422dff526599765297185420b3e1647896b81dacfcfef9f4260265129f5ac601. 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/AUMEV2248680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52daa2ffc6d5bc76a81d2a738a6b235d7698086ecf4a961ef6686f02a8c4a29d. 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/AUMEV2228398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bc5d142c9d4aea430eedc1b96782b1a9a2ce278279102bd83f3458855c8c98. 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/AUMEV2222222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68590c14b5d17bb1f631f421b13b5a2a7a6cf25a1402f4711d34b1ad82488f20. 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/AUMEV2211333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf52e5bca2c7eccc095f712ff6fb407a1f75ff4a3b7b927488ec74be63ce9d8. 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/AUMEV2202966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c554a2727dc043aab7fc962954b724e864f2063c1a6b7960a442556ef491a0. 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/AUMEV2186008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50167469d1ec5a1e60182c4b2e79d75f742b2e5fb8e070a0bdef4440f30ff07. 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/NO5DY2410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82c1a46cf29e5a596ddb475b3c10a76293730f8c660c31aba69fb50fa73b289. 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/NL4WT2400213.