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 0x214b47dcf4880af23a3b0f9a89f610ec90f8577d68fb5c933224eddd93d9f0e9. 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/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 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 0xfd0012ad3c34eda565ba90e94ba22fe500c5da9febc0cbb103d885030de29403. 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/USDY42092607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96599a0d9258dd51e34991f77ac9a63a4592f364562db5e37a6ebc579019efb3. 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/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 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.
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 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 0xf92d756e53724b10153416767ba09ba95f79c6743729e67f3acae60821a30c3f. 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/USDY42092614.
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 0xbc2b7fc546abc412091998d57270e4ea80c8659bfd3b37e43aa1d9f5fb990082. 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/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 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/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 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/USHM91777683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da2bff6ad21c8950e0482bd61be90f97358eb4bcf3c1bad554f207768451596. 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/USHM91777684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8c25bf6937ebd638ae7fd8e403ca0b031763280f54efcf90f9d566d934d2a7. 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/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 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 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.