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 0x81e2e2de584eff748afa3562c31cae96f08c5b37428162a32e1b09778c22cdd3. 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/b637d9da-9100-46dc-b19f-0c58804d4147.json and https://artists.proofprofile.net/proofs/artist/b637d9da-9100-46dc-b19f-0c58804d4147.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 0x3a02187cf373857ddc762da0afa52cb26cd0d06aa614e19b20609110eb59d02f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAEB1955281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb72d98362895aff9033fc444769a60c6762e0928998931cf3f2bb4c922acc95. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAEE1988885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63974d0c303df39258d67aa711d91178a9ae04b4f50924ae17e2d3f54cd47660. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:07Z), 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/TCAEE1988886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe55516ac6eba34a24ae59fb2fbe3e35fcf34bade88f7ae3f00049259526569d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEE1988891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fed8f1102b1e78bd1c1c6b202bd478caa9ede0756dbc9bde57f4dc7c9089bf. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAEE1988915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a54658eba64d516c399de56de2671c047d3d8cb277c9a36a8a57b9ddab17ea. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USDXS2014326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9588f4bf0de72edd96ee3b2b3c4d044e67842bbf624220f1df7489ba633d6947. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USDXS2014327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b8db0106ee128db0c8ba2aa0fcd3b90dd862efabf58473484276bf741da16a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USDXS2014328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa76988b6d91f8d8ec0e2c84a9457761e3b1cff5229035b21f60787c03d30452. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:06:18Z), 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/USDXS2014329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486d1df3955f7a971c22bd9a759b9522e8d3d1986d8d853b68f9cb7d8c0e8c8d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:39:33Z), 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/USDXS2014330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ce8162c8b0cd57de626a70fbca1c6b84031ad9729e64baeb35e1f6a7637f6c. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/USDXS2014332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb863ccc8117cef9a98f58dd9d06790fb04426afaab648ce3d13226875116cd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDXS2014335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8664bee8667b3fef9e81e2fb44c8240fa5d4ae6e09721ea7cd32c77a2cdbae7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDXS2014337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb175a5939facdfd61a351e3027743aad89d1f0c59596469941a54b2be1847027. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QMSAV1105063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5894085e3b3890b2da40d824c2309b50ea8509df98ca198c390ccc7540a2fdda. 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/QMSAV1105165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23641ec03929eb2e625381fb9e9c227ca0083b7c15968f59947653579f764d2. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QMSAV1105200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec2749ebf1ee24aae95bb0a7ab79b6c3170fe39adf0f14614daaa646ced3550. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:16Z), 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/QMSAV1105202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4751e4d475082acebd898adf8ade7124125317554b7b3049abd73a7c357d31cf. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMSAV1105204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd890d3998bbe78a4138378b7ad91a23cfbaab2f108c20f550e58a4a90a27bf67. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QMSAV1105206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d3201e4296f946bf053768e40901badb3cf16ad63ee0f0b01aabc294e8e92e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMSAV1105207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae62284c3deb89a8b0feff8c5f8b048741edc80d3566c3c28d51b486849c511. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMSAV1105458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9695377191ea9d6e58a9d33cfebac21157e39f0717b6243f02e8b0b218a936d1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMSAV1105340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d73df3932e679c433c423d85ea22e9c7d642e4db97865bfd68fadb74dc8f84. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMSAV1105567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9a24caac668b32ec9a82937745d9b18ab3df6b0142b70d0d4457ca28bbd9eb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:15Z), 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/QMSAV1105620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39c35f9c22d089114d93fc9ff916e9f48a16504d1f39bffd1a801b746d5867e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QMSAV1105622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231c06becb39bef623b6a32dd3c1375db73faccb3b8c4d2739df0b882f8e1998. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QMSAV1105623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca8e1c3c7508376fec95dae885058ec251f46e2256c4618aa6aa8d8e185bf1d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMSAV1105625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32a22ab7c7f54f382a2800dc0fe21c3b09e8c715f482bbbcb87272a7caf6edd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMSAV1105626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5627a07967afd529dd0405cadeb8700c37e3925241c6540cc62ef8a3d634289d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:04:33Z), 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/QMSAV1105627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88d2b6e9d54934a19bcd372e2b102b1bac01c8ef65b77221b0a1fd8bbdf10a2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMSAV1105767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d73df3932e679c433c423d85ea22e9c7d642e4db97865bfd68fadb74dc8f84. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QMSAV1105567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a95db8ee29b830f21ec67b9781397678a6144c16fdc5a0a5ffdd6f3eb1f25a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMSAV1105727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18c4da72b7bb1ce51838f9200349e5ef9660fe2e2e1defb4fd55c8a2850193c. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QMSAV1105770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e95e5feba779796f59837860ad2382ae5916a4a095fd656cda5ecaa7f726b3f. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QMSAV1105771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e6058aaea1a6794f2d0e2918e85826c800a601d296b2daba974e5b3010bf89. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMSAV1105772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8d020dc7c751aca370f1a69986810b76e78948de877d5150dc5d14949b2970. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMSAV1105843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca3ca61d1d49c88964dbfa4b29a8d9c2810825a5d5baf8b349f5a59005e0859. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMSAV1105905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06247b362dde4b9e7570639323cddde1cebdaf92bdf3e549dafcb58642be3f0. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QMSAV1106006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c667811ed2e0ee6a0e5747458ec0721ae80f3a2fd3ff40cbe0a8be587c63077. 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/TCAEM1942267.