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 0x9f720b87883bb05a4e0d632a4b29e144a5bb9cd5e453b18d0f72865768c98625. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2bfecaa-1870-4f43-be6f-915d3cd28fb7.json and https://artists.proofprofile.net/proofs/artist/f2bfecaa-1870-4f43-be6f-915d3cd28fb7.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 0x1111209b42f0d802503558f914362c203354436f0b85e673830e45d6f0af7ae6. 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/CA5KR1517103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a36572b191c3dd863d7adeba0b540d8808ec7855f7e6e1f7938d82ab00db8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CA5KR1517105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3161878ac291c657566be0403fc5ac63e2acf68038ba6c86a4d5d8b5ffd1e3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM21779001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047b52f643ccc7c5f178e81c359ab5be9dd763845f0c3cab899547679cdf14c6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USHM21779002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44491ec2ad808e447b481e3d406fd596769d9d21d379bc2a63789f9e83924c91. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR1706164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8479aade1ffe105622a3cec6fb7256e1b4d209df0b43323dc1a693554861b394. 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/USL4R1909511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacde546ea658e8ff9b6aa8e6e856211731d6fdc6c20e4190814ac3c00833de4b. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:19:14Z), 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/USHM22495530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0e9b242ad2553ff769e05c065ddfb825af6ab1432c3131c4825dd5b064de92. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USCGH2596829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ba085d0db02955b95e74dc7cb3345a6cdee3ff6a5a8c798ff84b8c4a533786. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/USCGJ2517785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0e9b242ad2553ff769e05c065ddfb825af6ab1432c3131c4825dd5b064de92. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USCGH2596829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5e9a67a560f15a858dcfd5e19a6cdfab91f0a602299f0aaf75336df4f84a6e. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/USCGH2596828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4603f50b1609d1d0063129722d5923a952cd33d30898001f9e1e3e9ffa3f99dc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USCGJ2557179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0e9b242ad2553ff769e05c065ddfb825af6ab1432c3131c4825dd5b064de92. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:45:58Z), 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/USCGH2596829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bf3dc750a1cb79aa21a840fb237a812f59e6e5088aae9c9624f7aa0b4ae7d3. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USCGJ2566130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b75c9f4a1fd7eaadf4760234362016c16bcfa165a9ec478337ed1819b7c0d54. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USCGJ2585277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cef0702a9e2d255b21f843f7c7f2b07b377aec04438d69fbb8781a371fc210. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:03Z), 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/USCGJ2585278.