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 0xf22000ec69620719407656d45043354cd18924283c384d21323480551e563754. 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/e070505c-9f3a-4902-8c99-a5dd1ca5ff28.json and https://artists.proofprofile.net/proofs/artist/e070505c-9f3a-4902-8c99-a5dd1ca5ff28.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 0x59e49c37e258ccf8335a1a22f77f85b575569d728f1c9df7aab29d2b2fd330b2. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/FRDKW2308067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7624ead23665125271aec8301cf03b6a9e4b2695f85899f737328fbd87125d27. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FRDKW2210276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059763b0d7bc8f6a14579772336487740ecf39f3568116bee2ae1da4fc96fcb5. 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/DEUD42576072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a09a51e12d424bcee9fd14bfd0a95d5485a9b485d72ec3925b8367ffeaf4978. 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/DEUD42576074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a686691b92c161e0d345d784d4cdec5f57d8011ce20dd2949a1d1a89259e93. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6F2593754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf283e3e638cb9621decd2171e1eb63461d01832432fe6c5a40aa62f58287f906. 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/DEKB72530259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8930ba5596d1bf60c9a8ff2dc6f02e08f2e11d804dacbfc48135535abb2ec48a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEKB72530481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e465f44796146acca2d4ef0f37d9eefd8206d0b6df74b7abc54b9c155e235f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AEA2Z2541988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944bb22edbb74f267b56d349362453d7494d55f033ac8bf0d0b01796287712ae. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DEKB72530723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05baecda6c73122d74125a8bfdf96382d875c20942cd3211b2928b10449efda8. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/AEA2Z2541989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fed5af24a887f8291a96200ae3bd2ee5ad698adb4eaa9b970ff3c454308534. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEKB72530721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d816b3b24d27d965b011e4ff3d9b86aa168c535d8b516ecd69720d7047f3736. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/AEA2Z2542177.
LeBron James Vs Kevin Durant (Freestyle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414cd620013c6be24a8d850a6c077a016a27ed3bd2311336e9689f658a4e2435. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AEA2Z2542444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3be856dbb1c0e9ab854f20f3f8edb068c2a999902cb107e5248bb3fd774a37. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/AEA2Z2542919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8af414cbd5d132aca386b950385d861b1652a8cead125e7d5abaaec8aa08c2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/AEA2Z2543806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7df355bea4977f51336a31d18669cedce892b18fad1298838da65dd90426302. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/AEA2Z2543815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9a3ae948079a3ebde2c5896c214e44075d98a119eced17af1e0a0c06cbf32b. 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/DEUD42565653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6448ac7d4af38c4914c23efdb9314654494693fc9b0b6298a4d9b21369fc91b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/AEA2Z2542976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a80a2194962c2720e8233053696b38443af98f7808d0bc6d28f60243caa974a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEUD42571333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3689525a01a8abb2d379422ebb09dc658fde6b5336f899f8224af19211fb47c5. 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/DEUD42572841.