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 0x9fe37d6f585e1fc1b8f871f6bab8098d22085e1ef7d0f86933470094ba90e620. 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/76c7758e-1418-4d28-a870-a467c9d3a9c9.json and https://artists.proofprofile.net/proofs/artist/76c7758e-1418-4d28-a870-a467c9d3a9c9.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 0x3d72fcfe324dfcaf14670a0069d2a90483b94c7188ab048102f413844ae75405. 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/TCAIR2450167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a58a76d20b160f41be4fe601f4ed9a4e670516ad32838a7f4734c70632f99b3. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAIR2450172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39819d9af47f73ad506f5f219729cf89d44c2225ecae1faac136dc9f08551b4. 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/TCAIS2450174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b8be942b1046d2615d8ad9fa3f3085569d2dbbc81acdd08596185ddc94b3df. 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/TCAIR2450176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f1413df8092552c22a38fd89cf11aa989b57c866ae4d1ecdd0e4fbb68ab106. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIS2450178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf600dd2b69f543d31bfd2f81f2fb6d914f24ba5b3377a832ee9a11334adc30c. 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/TCAIS2450180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266f2bafd3fb3c2bd5fa704b8457ffdbbdfee0dbd111ba1d0bd060b9c37d8acf. 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/TCAIR2450184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306b30958c9df1e2cc017c374d81026cc360f9cb41c20a36de4cd8f611b1a29c. 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/TCAIR2450186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d71c713c1884742b4f3c7f81980f8fd5609f7b29411626aa1b4b0837dc9665. 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/TCAIS2450228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb206255fcb53a790519fed99788c1b4e6394348a659c7a5305eadf47d9b582c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIS2450230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75358be7700ef9935801885983853d1fcc86877f17eae89e5f7d2121dfb43b4. 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/TCAIR2450231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed41128f44a4a659bbba1ec609a6780d1c7d3f63062a83956269b75929fee220. 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/TCAIR2450236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d13bc39c7bd0c702cc70c17f1b3b1fca880521e5f14cad4208d7d58ad894f0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAIS2450239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da8bb51d6cb3c55f28a82ebccb51cce807a2d77c13ead3669207170e6b8645e. 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/TCAIR2450272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1d0893f3c8216d46baf91d8f15ce889d0e169af600ed99cd97e833f614c88c. 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/TCAIS2450275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bde885409f633216fea7ed18fbf75a630164d2e099b35db6137def3e348a0f6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAIS2450276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2029144bc70c17d95f7e2a164fbb10f9a9f0085d98bc5fa25e0fb284d1ac554b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIS2450278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88e67318bfac2a06b60bd124b500e225529d8d98fb8f30afaa04717876e57a8. 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/TCAIS2450281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d3f48e4147929ebf23b7610baf2b41bb83af71de995ecb26f76efe5662ab37. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAIR2450284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee5686abc0209b8836fa6bc256609296745a470928c133d08263dd01b8faef6. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAIR2450285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404d5aa993591721697de911933c1059a453853b6b69ffdecb16cea0ec53706e. 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/TCAIU2482239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb931632d0db87fa601328f9e9d9783829a0d3e10e94bb5448c394a397de015d7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIV2482277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd736353a7c9f7fdc366a0bf335fd6bed1b8324d7eba393011397a38e838b1dbe. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/TCAJH2543755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f26a756e583e497d94836efb7e3107d43e6bd22c80ab0291c84e07bf538f2e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAJH2543781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a91185bb5b91a9fb3b410ddabc54dc27c4f9829ca21537b6875ab8d4c60e9f7. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAJH2543784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b2672a21dedef0209bcc09ebe067c3adf40f10d51d626f3a57af8880b3d57d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAJH2543789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cb397ce38ebd96e9594b64013695677947877afb553fa0da8c40abe7dfa026. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAJH2543794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e57dd778e5da5b08928f4736e797b24f228a617b913f4ccc087c66b5a7ebb5. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAJH2543795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6635e8257feae390d98b96db02c5de615e9876e5f63ef7863efb6b6ace4e3941. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAJH2543806.