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 0x214b47dcf4880af23a3b0f9a89f610ec90f8577d68fb5c933224eddd93d9f0e9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20237cf1-d823-4143-a56f-f9bcfed54212.json and https://artists.proofprofile.net/proofs/artist/20237cf1-d823-4143-a56f-f9bcfed54212.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 0xfd0012ad3c34eda565ba90e94ba22fe500c5da9febc0cbb103d885030de29403. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDY42092607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96599a0d9258dd51e34991f77ac9a63a4592f364562db5e37a6ebc579019efb3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDY42092608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ac9ab5adff924b8fb95f59721e4488c3a3f9cc5becf0042566c696ef80462a. 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/USDY42092609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60431d206449c85d6b92207cf8f7913fcf9b71c705629c4d0a3872d793bcfa90. 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/USDY42092612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92d756e53724b10153416767ba09ba95f79c6743729e67f3acae60821a30c3f. 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/USDY42092614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8045781d60b90374aa1a2633330b871949d36ff335e24f7b3fbff0e54487aa49. 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/USDY42092616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714ce2849f5cf894f87e3b7d3d1e55158fac33be3c171a7461ba7f9441095c5f. 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/USDY42092617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0c0cce376ad0a7ae5cf13c1074edbc5527375142fce3a065cae670d6543d80. 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/USDY42092618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab08e43c9689d9856d0b4fe5d02238ecf460f43859182a4c4304a04801a47b4a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USDY42092611.
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 0x1f5919d5d5c130dbfafcb26491425eb577ebe2bbe429497db2ace206cad4d713. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:17:52Z), 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/USDY42092613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff284f6e7f74b6b0d7445f644542f8ebdb8ab70d91d0f1e9a9213d5ac31a9c81. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USDY42092610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef97a14cf56909a7802faeec0b1ffd66f5672aa0b0dd53d762c1127946559f57. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USDY42092615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61d64fc01db1cc8da232eaceb3b431e87b40ce30d29e373175b7fc4d81d951e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USDY42092619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc99c3523e95a766c0e94461deaf52266630e3f1369a3d89665d01a206f4c952. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDY42092620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2b7fc546abc412091998d57270e4ea80c8659bfd3b37e43aa1d9f5fb990082. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM91777676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3d1344fd18934ab377b984b561436085e7cedf6ec6a77657b5612bb87a5f0a. 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/USHM91777678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e44499e05a7933e972da3e2d7b5ec04b9c5ddf1896bb6bf04165722c83ad6f. 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/USHM91777679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5489fffcef9c08a5952d546f8f6c669f0525e363709705137bf75bd63c1cbb. 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/USHM91777681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8596fd71e7036b3ddb440517ebbb15af580d197a94aa8513ca61fec31a6b0e98. 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/USHM91777682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd24bf697d12bc6d626b8dcff1b0c56d9026d007560dada1dbf671086f0ed02. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM91777683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da2bff6ad21c8950e0482bd61be90f97358eb4bcf3c1bad554f207768451596. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM91777684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5076240a94916852b4c4ec6b1de79fc8bb140b885ea9d20160edb47da4d0d054. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USHM91777685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31894a15053c699e23dd25d972a371c96221b7e6fbe4d5ad2bee4aace4dda141. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/USHM91777687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8c25bf6937ebd638ae7fd8e403ca0b031763280f54efcf90f9d566d934d2a7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM91777688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fcac2e622a24d04f1f6fd1a053bbda54bfcd2f4bd8928703cd868aa80aed9c. 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/USHM91777691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dbc6b1d0cfe2c1d2431532893ce9b318ed476ba38fa6fdbbc1b2e320910101. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM91777692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116692e262b8e8e39cbcef8ede1df4961f7218bb2663f2efd7338a89a662a646. 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/USHM91777694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044993aaec9df0f116921f8afeb6a9a0ab94f1b60d6d3078582aca393e1c20fe. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USHM91777677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69914e9caf6c7825572629f4daec57bba6ba04905b78db38a973e2bd56192bc4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM91777680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23d10f78bbd23bf5011a7ac678bf3f2bd8df58a371c2fcffa9b2695da1efd53. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USHM91777686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ab3cd56532fa43b1f4dd063b2c10a9418b0e9e9a31359c3112261db79da916. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM91777689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fad03bcb7ff5e066bc9db7c50e08faf274ddc95d05a6c49e069df0e29986c3b. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USHM91777690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080759640d6de992c7b1fdf31d83a1114e08aa885f266763b8843b68858eac28. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USHM91777693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8ca3be01aae1c92214a77c9c5adaa1492020a8cdc13afa407491d6a90c8aca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM9AA1620680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf047cc33b7fcc448d13f8bfefb9d8a1813c1d45c54df02c7f363031736a9c5b1. 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/QM9AA1620681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca1945ecb045fcf6dc39a4da9ae63d02e82acb699343c3aa1761b6bb66d738b. 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/QM9AA1620683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c22bcfd8ec78b7665cc9814deb84e05341fa789695b335495399d87aefc711. 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/QM9AA1620679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29c2aafd4000aaa03f1339a5409ecd411f97acbc7cebc76ee0bec751a89f575. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM9AA1620682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8938d2353818c3ecab10052763a4d8f8a4f82d853fcd03e5fcd34f8ec43e1dda. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM9AA1620684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedcdd4d4443a8e4b5c5f5ab3538779aea03315fe5b5691799e11ba7bafef25c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM9AA1620685.