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 0x97c46bd0e5f8d5fd29240345975c37a42531921d16ed8af716b04b43d692ef33. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2defd0df-8fe1-479f-b03d-650abecccb44.json and https://artists.proofprofile.net/proofs/artist/2defd0df-8fe1-479f-b03d-650abecccb44.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 0x38fe0f7009ef8f4d37e125681465c0d637ab2209a5c4108dddf99522f63cca08. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPT2210959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e6c9f224f4db2a833049e31e8d03ad9900a543555b1a45ba3e9e16da228173. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCJPT2210965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00c590020b2a14eed409dc30bcd73c9f6f0ceb211e9776b7bacb0eba2fc252b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCJPT2210969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8babbd1cb7e3dc669014b65d537d2fa4d921d0d4948a14d3634c843ef6c56b9. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCJPT2210978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94148896577d0c659c18090e15881d78eb66ebd1913acd5832880869982f258. 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/TCJPT2210991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ff21f3457d0b45c980366577dd55614702f2a245a659b00cfdba35b7ba0e1d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCJPT2211111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d976dfc47de7b11b3e0cfedc60c79797a7c9b24aa34766ae3ffdcc2e003eaf. 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/TCJPT2211115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7784f1d216de8ac57d6641b47698d73e00244235d0f6e28978b76e8ff4c59e29. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/TCJPT2211128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd390f668d95f9b41c75002ea2e03246c0e8b75a0cfeedb70b06f68c51e399e63. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPT2211134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426dddd82d5c19bc1a97e58ffcf0b357685e96ef9ec19d4d25918ebfcb2d4f60. 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/TCJPU2211396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f9eeeabd941d148bebf17ada45a7166db22ca2abcdc3827a49bcada96fdb2d. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCJPW2373789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0044b40ac82d825e45ff478ef9f104db11299b8a6cf4145f83273c3adc3fcd2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCJPX2307728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b6941259c368ec31abb79842b03810c7e17fb05ae9ccb239c92705577185ac. 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/TCJPX2345136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ad734501e90ba731d278b5ac1a2df2e65a668af30d134d724b9ccaaebbfc19. 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/TCJPY2336635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4d42776f180e11a05aa91502bd58be8d3f1b07d42e714aaee53a8ff74c3766. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPZ2402357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde4f29253532cc489bc7188ef01e6dd25d35c0331971897c4b7894d0234c673. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCJPC2432357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70098073d29bef9388e0f98bb1c8e53fffbf7c0bb71d2727f5d0ba2ce332707f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TCJPC2472548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70098073d29bef9388e0f98bb1c8e53fffbf7c0bb71d2727f5d0ba2ce332707f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCJPC2472548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e1ef2834b197df7ff13939c5f1431b334418b112e3af1481251a5c1ae5f6d7. 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/TCJPD2421328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e1ef2834b197df7ff13939c5f1431b334418b112e3af1481251a5c1ae5f6d7. 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/TCJPD2421328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392baac1968dde5c351f684d1f6fa7033444ef217db42095a4b3ef787e0b28d2. 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/TCJPD2590525.
twilight city (feat. Cota & Mizuki Kida)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968d088815fc34226577db76a4b0db35efbc05f8dce6c19f457125eaa2a519c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPG2505814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968d088815fc34226577db76a4b0db35efbc05f8dce6c19f457125eaa2a519c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPG2505814.