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 0x60f873369b9893c2ea5f75527bcaa3e4fd72416a54712b5d4eda9a26cdffee41. 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/1fcb7126-23a0-493a-9a18-f93cdba340a9.json and https://artists.proofprofile.net/proofs/artist/1fcb7126-23a0-493a-9a18-f93cdba340a9.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 0x542d0420c4f531d9ef04599b32a79556226a735e6dcb4b4dab070d8f3df8b56a. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAGQ2210669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76c420906fb8a97e576eae3221c0f587b7d675e7cd2c83167c6961134d2bdaf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAGQ2210775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7b51edd701945251ed88f18f1b4ad2ebdba0dcf70172b5105fe7ee33043905. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGQ2210796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f1996c54b44865aa3bb4a95e70425850ac09f328011f89b9f56a048eead08f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGQ2211014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb88093b7a0ee4ce708ab923f64905b79ed15213c410346e7bc5d251320a4e3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGQ2231132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd926fa026fae924f0d0b7b3600fc8fd9a75e416f53f5bede5d9acbc5b2b2f0e3. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAGQ2231156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe3a95c5ad8ba77cce1fe6ca807eae3ca1aa3deb8dcfbcc82ed692ec6576a95. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZNMX2247678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31248014c44825d4470ee85e6bf47e2b4b3d50a8ddd6933cfe1978f8a2bff301. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAGQ2231173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe830554b3c3aef7dc4e94f0f0581252e8b22772cca95994abfed00fba8b0b5ec. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGT2385123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55acc7da083e955073d000b1f4f71627cddc2793ad7f0ee43ff53271d1959889. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCAGZ2300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55acc7da083e955073d000b1f4f71627cddc2793ad7f0ee43ff53271d1959889. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAGZ2300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2af5f62045cb868cc9bbcb1ad8c8edafafcd9eee167f21bd87255844f6f8a7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCAHA2375324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aef8d62ffd9be6c8544f8a0dc0e7f0b2fed7bc5596f120e944963892828f93. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/TCAHK2320962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aef8d62ffd9be6c8544f8a0dc0e7f0b2fed7bc5596f120e944963892828f93. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAHK2320962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e95d5f34084269dffb31dad81f5ce70853580f89a9029cf332f1cf69dee9bf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAHQ2300512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5793bc9735aa9fff83048ae9bde99946e193e3e3503e72f9c966d1a270ab32. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHQ2300515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bb3288397b82ef03f42ea335704e32d0f0d08929b21cfeb7a35fd0eb875806. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAIB2431653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44d3e2749b509c03f5d77c78b73c0f0c1bf4686c51d657bd6c3d216ce9a8181. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAIB2431668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715e2834e41854207a7e3eac78f60562596c9007145cace92f0896828fac6aca. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIB2431672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d50d8f34bb6c0209f6d72e9266476ceecbc85da0b532d49b953c0b322fd4608. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIB2431685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55820bc7dea4027e34d253a808ae7bef017097607a7fc27b8ba43935fd443bce. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/TCAIB2431694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bb3288397b82ef03f42ea335704e32d0f0d08929b21cfeb7a35fd0eb875806. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAIB2431653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237f61905815cc07c0bbd53a93c96784c01a5079b09c18a797d8b8867090886e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIB2431660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e5c8ecc93ecb32ab503a1791fc2d1fa19d32d45dc8f9514d957efde9360dfa. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAIB2431665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d50d8f34bb6c0209f6d72e9266476ceecbc85da0b532d49b953c0b322fd4608. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIB2431685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb953091d307c06b4dee6b922f6eafb373066838487026d436ffea53d194d2042. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIB2431689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55820bc7dea4027e34d253a808ae7bef017097607a7fc27b8ba43935fd443bce. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAIB2431694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88a84e3d485db5c35c7067eb6535a5a80b457d5a88eac52dffae41cabdcbe83. 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/TCAIH2400458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d7e4252db70da5889fd29973825bdec33cfd413a9264bdab9bd29b07856abb. 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/TCAIH2400469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d7e4252db70da5889fd29973825bdec33cfd413a9264bdab9bd29b07856abb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIH2400469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4999c59a1dd73ca9021b06ce146b7ff16d99aac1281ca3fed25be3429a67e019. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAJB2417636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6107d2e0a3f95c192ba23a2097dc0e58adf465579d513f6ffedbbf9bc78f7dee. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJB2454913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a3b998bc7284a99d4b075616ac7d4c99c23c8d93339f4037aaec77b1f18a99. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJB2484256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e12c5f2f9c23dce688b0ebe531189890ca2c140ad3f624bd8a90e0c56c4b34d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJO2528838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365b1011e188d40d029a722b5db0c2259649ae68d8e1961f31d13a6f1ee3ba85. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAJO2528888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869b8f930e57430212a7e7a779b0a50174fe8cca7c7970cbfb3a6af89ee39d93. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAJO2528905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627747f0ae7aa4b9dc3fc6518665324a9c9ad5b0c59e33506728586e263ec244. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJO2529033.