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 0x2145b2f8f7783c75a63f0e34a121fd4651053917c34344b3dc6cbe5be142dbf6. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94dcfbf3-b818-4dc0-b80e-f0512762e503.json and https://artists.proofprofile.net/proofs/artist/94dcfbf3-b818-4dc0-b80e-f0512762e503.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 0x56cad3f675909ae91cd5cbf02c638bc826e69f04edbf05579a9cb9ce0187d4fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X42199455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3194c80e3bf0b1a82d6ea8ffea968c169b4381b9c5064a39a26774f1c17ca996. 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/FR6V81943863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302407427d9ca04049e3097b167d4abfb53e6f0f84300928ba5386b5bbbc30fb. 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/FR26V1405532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb4e46330bcf8fd45edab97e0c918947d9c55f4cda4442e567a8d6b109d27e1. 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/FR26V1405533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c190e1caf90b9cf85d8140543ef043daf5f81e10d41159de416d15c47cd8564. 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/FR26V1405538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7d81b5cde94c7b387b1897351665ff7e67e3f50a46c3c8c1fba73b38137954. 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/FR26V1405541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32944f66cc0ff84d71045836eb97bfe36e3243626b5b11d0317ea02e4023a82. 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/FR26V1405543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc100750bea018f7dc2b40ab41f6069fc9952a95be6b772caaf3ad7f00c29b256. 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/FR26V1405546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaad72ce0b489ade2999259368b8468c87729e482933c2e6f43f005bcadf97b7. 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/FR26V1405548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca109dca817198dfbca16dc7aea91576fec5236d4673f49bdc37dce84ca68ea7. 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/FR26V1405549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f418c2b9ec752e4a765f0cdaf5ce82b9f75370e7ad4a31b4327f631180f4ef. 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/FR26V1405551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c28ceddc86c6eda714b409d7991738094f2ec170b65f41ec19e623d0ae2c4ae. 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/FR26V1405553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf87811df6aa9adb71d389e1436cd7d21b03bdb288e206ecc746841eb2d16ed7. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/FR26V1405537.
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 0x858e693eaf83f1a1cb67dfe70014baf34df28ef91422ab273d63b4fb0939a18d. 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/GBZBA1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625b5fae6634582917e886104680ad7bb44ce9eb92da1bb945693db1cc7dc7a4. 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/GBZBA1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fae6dad065e66d6d1494a3ce0312626538437f2ac6930c094cee636a324afdc. 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/GBZBA1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa213dac5630d4622a43bb572130222aa6bfa795601c424b8a033dffc440b5ddb. 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/GBZBA1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a37bb2870ff28f1b142fb0a1193725628cff03e56ed4212afa30298cf05e598. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBZBA1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3016626fefe2d036fd00a4028fe57e3e8a6331a9d6945bab231886cdeef78061. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBZBA1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0593834e9e09012fb405090c2bb498e1b8ee8dd734992b83f724773eee28e81f. 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/FR10S1600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadecb0c7ab6b0dec08884f7e07ee657787d1c87c13babc1322bee33e0efa2f5. 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/GBQUY0700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c8c5e925c1c7d1413162d0939007c9a54ccdfb9069460c622bbaa4400fa1f5. 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/FR6V81189751.