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 0xfb7b381bb0a7d6f5a875bae559a47fc100c5eca55b65775da0fb6a23d7f425e8. 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/150aac95-57c0-4138-a515-2136d6d9cd42.json and https://artists.proofprofile.net/proofs/artist/150aac95-57c0-4138-a515-2136d6d9cd42.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 0x67086c9687b3c03b7b295b4e73771a2d250cbfff6a4c2f55d5940ce9a6b505b8. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DEEC33501171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1eaf564966537c77f04f2fcce985af31b5ad1dbe7212df747e87882ea36b7f. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DEEC33501172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fae37bb33ce1e7976ac6e29ca79e9ce7391a2c7208a1991fdbabae64706decf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US39N2309289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8731abc3fde838b3fb19b941f3a7c0d85c75d4bcc19d3324ac55389689d834c9. 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/DEEC33501090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc79982c2988e06e6648c58b645696e1544224d41ae6ff7d77efbd0ba1533f73. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEEC33501091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ddcc4fb960f21429d9245be8209011c818027659d663eedf708a3976d4ba9b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US39N2302786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a90879046b7028abdf519034ff2bc82053b3674912d57e039efc1c355d05130. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US39N2302787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68919638cad5d2eba756622e70fe352a15f87a5d5140d5225b9dd92cb172fb73. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZZOPM2236540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecb38b8ee557de74db666baeb5799ba1aa752dfece0c73fc6509039553da644. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US83Z2027553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612edbdb5262af601c454afd2256bea51b01c2f9ce4f69ebf2d464c903944249. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US83Z2027554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd971029583990b9ae82459cee82f4572380756ac8761cecf182f8abc089fa55a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/US83Z2027552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0727fc1c1d4759d67d36f84290269a017679cb1271531c5cc48cc1e250842384. 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/GBJX31841006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29762813f0fb5d2d7bb6440bc869a841b9cc2490faeb308d29ddf3872366c026. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBJX31841007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ea59535aa89b1ca6dde939cabd4ae37849a6663a0090ad3ae26e0735b1c190. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBJX32116003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540ffabbab5b7d67e8d902c6b213de854d88f5edf963b7c8d246ea0086ad172f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPI81600726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d03779a1a09d19ff3b297aa7f1095414317fbd08d6898ffd6f789f6a9cc05bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU671602179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ed0ebfcf9832714f42f9e7deac2ff63c4e2dfb88a32ab1319ab9a3e022b8c7. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEU671602180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6444018b6a832926df000c262321966777ebcdc3b31025be670d5e8a5fa4483. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBHQT1500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17779ec29e73c9877bddbe50d1e5e4d654997c7f2811407fd46d8296d5ce790. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBHQT1500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc56b419db7cd00c40a4e3f84ea4b3262f4d8f80c3de9600f8aced75576fe9e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB7M21423001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716f67530a59c797ea90384ea45be44fa22a347d25ff3efa25e4a442b3437a82. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB7M21423002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a67f597759e0522984e56b7b50d7967cb831561243a054c2fbf962250080e7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GB7M21419001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6426ea9fa271e2f8dbf82d4379d1ab874bf2295908ca78ba3f61cdc472dabfd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GB7M21419002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dda3b5c3d9f180c330126970f5600d244182aef7a0cff7b6e329f390dbbf9f. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USW691300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bfccac8b12bce5324985c76f7801b41cd066ef2e83a0c37a23fca30cabaee2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USW691300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b60c483ca9237bfa9ab522d0c1942ba34a5e21b4951d5ec1b667c407ab2373. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBQWD0713502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383916f1b95ca27684f060abedf2818fcc3c7f5100016a5f7754a8d3c36a38da. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USW691300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7333dde4084c6ecd4add50707b32a757e52dfa41a4c04dbc46e13cc0674efeb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USW691300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0180044d594072d2656945c707ceb453c519013a30b83d852577c068f7493bd5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEH742174942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f2667192e4c13ca2b7027ec93b4fc52dff98511fcca850f4c99caee6dd80aa. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GB7M21208003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb755f40105dd68179346b1704fc78aef74434e9170dde7d972f38634cb1bc471. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEU672200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d51075c67c20296a7009eb80862657a2b8386df269e8f2f886bf9e03f2b260. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEL021802044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc977de708adc02e0ac05164c17e829aba13ae272c018fda49224d8dfdc8ef11. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBK6Y1403210.