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 0xb5b2bae8702c7de4c0739b2c21b8e9a559ab1be0f2a96ff24738b92760f43c64. 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/b9e0cf7f-f592-4313-a395-fc2902bd161e.json and https://artists.proofprofile.net/proofs/artist/b9e0cf7f-f592-4313-a395-fc2902bd161e.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 0x43342a016ca4f597bdbc737b247978ea417d822bdef2f9e81f258c537a3fe49f. 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/TCJPB1440099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cec5df01964e5594dc8b627eed5e22e769b62d69381e78300f200cff038d13. 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/TCJPB1440106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f42b6b22a121468099af4cc014268502c54003fde5df3d508005e5ac8de6fd4. 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/TCJPH1884663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb351e6a65d484dc1113297b51d276bb31e82da4981b1fe352b4fe7e3e6c06293. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:53Z), 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/TCJPH1884637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3877ed60710f0f5a8439db7376301cb4fb6db06be0523d5271bb26dea11902bc. 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/TCJPH1884665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe922b0e3f52820fa88acf3a8ae5baa61b28832d2078c2bcbebc88e28fe662d18. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCJPH1884667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28d9cd5a9f4848de25a6b7e14cfd1f6b12906d1db722bb6b14b3abd369ff585. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPK2086485.
Piano Quartet Concert (Concert in Tokyo 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7b4d61f72b5e6cb309b166faa1fcfb8c64ad3e7f643e2a96da0b0bc316f79e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPC2468313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26572e534d7e17b3057116b3acf466600ec0da1e37cf2ea8e8fd92debde02300. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:01:35Z), 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/TCJPC2468334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639948198dcd9902677c16fda438b9b1d01a74d0d50b312a42bae266eb633d63. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPZ2465457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa522906a347b89a3a1921f851e12c74cae5aca4b9fdf2ccaadaec61f69389ad5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/TCJPC2408467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7b4d61f72b5e6cb309b166faa1fcfb8c64ad3e7f643e2a96da0b0bc316f79e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCJPC2468313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf360061e5a1f50dc19746d333c96bd8479abfe54e82e97f44523de421e89de27. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCJPZ2447091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194a1af3458da0aabd05b435153eebbd1c3844c010645791576c8213952f6a95. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCJPZ2447107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddec7e3357c800ee3aa59497295603c5f89e10de3777172c2a7f3f81dee09976. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPE2574820.
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 0x90a42a22179462e6f803b9ae7a48ad3be09729878a0d3008dfcb6163f648cdea. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCJPZ2447097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b3d3f976bad326b7fa6683de249f9965669c396cf56906b2d3b76f568591fb. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/TCJPZ2447117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c65d67b1fcbe7943c7d7012cc5484e73c5d05faf2c8ed8e00ed7ac26b4fe87. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCJPY2316029.