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 0x80dbf0ca8a6abe95e02b11cd0931c0df5fa8c802408801cb5815abe460e9f0bd. 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/78f4a1f9-57e9-4699-bc9d-39be5febb016.json and https://artists.proofprofile.net/proofs/artist/78f4a1f9-57e9-4699-bc9d-39be5febb016.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 0x7802071c096b640cb661526585bdf1174c354112340520e40dcfded32160c875. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:13:48Z), 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/GBKPL1817165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03143898f93c007dd5a8bd821cae7c0dbb8e47b60e481ea7a5287e3e67ee421e. 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/GBKPL1824929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289fda2e92977a522173e56ce3b16d402c3f94e00160475d9dc05e0433a02b14. 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/GBKPL1828003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbe905ad88b4a12b4b981412b72b099ec6b303b55e7b1e42b3842d190e0090b. 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/GBKPL1828007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71034efd409590f8ad0a1befb5964936b165d24d6d580907849619074a1079f. 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/GBKPL1828004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcb585d2a02b7b741df3367c612401a26aaff3f72d4edf3c72c5ca5a10adca5. 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/GBKPL1828006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904cef2ff3ef8bdd752fa0527b8002ed5b15d0ddb5da5ba48892525241949d44. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBKPL1828011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983e58f5bf1f4b430aa2c473f3ca08de61dd8212da2315846f99885de23fbed3. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/GBKPL1828009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757e51770324dc4c0773697fdf2ba0b76925980a1d74409f6c4bd6bf32318836. 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/GBKPL1828010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31da989263153e15f10be7cf6945ce611a085c0d857328c24e981f1e555d454a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:35:40Z), 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/GBKPL1828013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cff72e1ed7ba8b85c1af35c51e27b931b117c79929c89166d2737c8664b2866. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/GBKPL1828014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2945687fd6a05b03a234b3cf41853ed96acdec11cf87298b32d575acf39b7c4. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBKPL1828015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49e091e7a1a65aff9b737e5f41540c605ec9ad0fa92f6c92d9ca1308f66855e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBKPL1828016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31f2c8012d034162321c2aa77f463a26d4dfc08802f6e546e6bbef16804c6f4. 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/GBKPL1828019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425b278f422c5f3c713b6828ec8cde74e6ff20191f6a39144a759b9e07ec3f1e. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/GBKPL1831228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d14f9d848e73a00be1f312326f082b670554265932b22c1929293ea4135a003. 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/GBKPL1831230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76ac8fe1c29b00aecd882d4cb03f198bc0c46300fea25cb59ca369dbb2429c1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBKPL2089318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97221f28b79505369157ea01e301a10ffaf7561f270f50e13df0ad39bb4d917c. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:42:52Z), 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/GBKPL2002472.