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 0xcb80d385e070251fa5d23c03bc15b45fc5b58e0640cded91c37aa76b869dd411. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99d2d8be-a680-402c-b8c0-ef20d337857a.json and https://artists.proofprofile.net/proofs/artist/99d2d8be-a680-402c-b8c0-ef20d337857a.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 0x0675547a015b9bf1acced0585f756c3b41f7dcdd3a0328e0698c34161ebd5e5b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCJPL2098931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d85654d666baed4393dc4103dcabc36c2e9e05bb5705fd5ba2c6e0c488df9c1. 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/TCJPL2098933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde69b4f0df5db3059443bf6ef18a38e3e9b783fd41fe1c451fa83c5d213f24a8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:08:27Z), 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/TCJPL2098935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017d90304e8fbad4471ab0af87ac6755ffd2f1f871fac997e5fbf7d5f48932f8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCJPL2098941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2ed4f0019f3d6410a704bcf9d4a6d4979c9955cef0a820eec8b6d85057f660. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:01:09Z), 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/TCJPL2098948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda54df472dc177578e5af1616cf2aa8837a6f4e05c0df10fa25bb613a9754ffb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPL2098962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55652b2a4ee93a7db3326a9bd408c53673323f005aba43cc4bac5a09fe56f6d. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/TCJPL2098919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17be322c9e47cb01cb48715d3998a6fcd6c0568aff80d30bc54d22561299b64d. 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/TCJPL2098968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edfde41a02097a36bb3ef890a2b2d0993421c4999ff416a5a2b5b01425793c8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:30Z), 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/TCJPL2098971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e134c218f94ea661067cf196794eb5f29173b18ba9a7fe8745fcc7a7b7d9d2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:37:40Z), 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/TCJPL2099540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca0d9e6b596f58bac06be8f04b086ab7f6e9a02a12f11863543f7ff3ad40e23. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPL2099548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d0a2976e2aeed4c9b457c75671724a067dd94bcfae3a92ad032a8067386c4f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCJPL2099561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5a16fc47c733927d0f77c78fa01fecd569336a09b9359cb47de047bbca9a9d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:48:54Z), 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/TCJPL2099565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baa32eb868111b51e2b5931cfa9329d29a3da408d863fbfec78299fae41cbb7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:46:49Z), 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/JPTK01103480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe255d108cb55696bd66c52f859c3b2ddad236c59ca51d44a67d24cc0075f7af7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:33:10Z), 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/JPTK01103490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757370710402163c7923b35578a6b729bafbf67ba898972320cac80c1db0eef6. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPTK01107280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf352f7fd59e38bbdb3e3c465fe38d811eccbe8ec4ac3832485f01b28144719. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/JPTK01202420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6803a65ae47f9487202bb4fc0eaa83a55c909977d36555a9f660246d85ff131a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPTK01202440.
リトル･メアリｰと美しき憎しみのドナウ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb54bf233672fde4e6cf98bca178fb4d9cef12a89a024adfd53797ab59830b5f. 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/JPTK01107300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd37b684ed9bdc215a109d962c3e26aba8a37fc1b3dc23965e6403d321e1d749. 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/JPTK01202460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300e4f3e67237879968d06c4bb3207ce10b101cfbcd2283bf086d9bd7fc6b100. 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/JPTK01202480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf042e2a048559cbe9a5ead7cdc42f70090f3a2683e46c12da3f48d42ec84398e. 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/JPTK01107310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd579e5ac964614dd9ed72413e21df9fbb14b43865c8640d12ed85eab217dc8c9. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/JPTK01202520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638fd525943e1fa7a52b321377634c0cd94f1bf433128469f1d9b2bf897c3161. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:59Z), 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/TCJPL2098274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8289eb011b9dcff93ad53af53134167b520cce94b993fdaf9d8697cc119843e. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:26:55Z), 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/TCJPL2098293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc13ce6f16f380606cc2d5ef0519ff2031ae19a28fd1b80dba3fc55f6ae2dc8. 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/TCJPL2098294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb396a3a67824cff89f10932e432e9ba75bc2d211d2aeb1d37eb0c9fee861b8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPL2098909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89afb16d9eba1d3e0d7c70cb8f3f1d5bfaa019ba668e6f219d59507d73a97041. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPZ922006250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7c12c9030e9cf10db4bc38c49ad181067b6c37c0e567f3e5c966686fd47608. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPZ922006251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45761855077d8d99909d46a51b038b0497d970bb57c89b362b1b7e1e9917de4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX2276125.