thumb|Sykes in 2016 Miranda Sykes (born 1978 in Spalding, Lincolnshire) is an English folk singer, double-bassist and guitarist who performs with Steve Knightley and Phil Beer in the acoustic roots/f
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 0x87b2299ad12fe2288be7858a7d1c965594084f76ad45e56d5da82bc9cbf50248. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/feb7c20b-3b30-4631-9b8f-7fe1a236bdaa.json and https://artists.proofprofile.net/proofs/artist/feb7c20b-3b30-4631-9b8f-7fe1a236bdaa.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 0x1302b56e1ae58d8725f2e2f8ec15e0b4a0890a19e1045d90ba1295f3bf82522f. 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/GBLBA1200348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766593173e70e4ea4f50bfa27e12c669ddec6579e08c8a77b4bc159aeff3bf92. 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/GBLBA0900273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf755615bccfd550681f76303afe16896e395e49e2291fc036486c911c24e6048. 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/GBLBA1200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fee03a1432f458b4832eff962d39b02f424ba1b9c2cf204973bf7bb4449ef3. 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/GBLBA2000530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f14769a21c1fbdf59f3f1787381e9d1adc003a8a835d95c3ec97b6cef5b12b2. 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/GBLBA1500415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ee2381fbc4f1fd2ad83611736651079d48b4a3dabeaf93f6b7b62b04ae523d. 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/GBLBA2200581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1568cea70fb75bb016df5f9cf6b2a8f5d6211ad7465b58a0a33465812e6d6658. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBLBA1500413.
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 0x034ad33c2fa14499a359881fbfa66dfef4309c5fc40a31e895564459350b3b1f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBLBA1900490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b09be7a7126ab37f1c5253358bd4433ed0eea81c8bf5dd1cb4f3338346df552. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBLBA1200355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b6033d4e1c0f48006b2e0d2fb74fd988a62a190dc8d9ce78937487a2093c2a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBLBA1500411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68ebd55fb01a367c2399872cffc7d0858e7c4948752548f67a078ae3d53f182. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBLBA1500408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54526678a47b9e2a379f8d97faca21e3ca08405fba94580253992b0bcb617b4c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLBA1900496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e16f78b4cbbd3aac07475482f03597b051b24ef0b4d09ec904d1d931022816. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBLBA0900268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4ce949a8abe0c8a63706f9bf0e849a3771b1d297a79b97c3b9fcb550e38a2e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBLBA1200350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f3042c67e749698f079e160165c7d11f312f486a9990600fd7100cef864d1f. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/GBLBA1900491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf117e1c81a46149757f6dc96887f8a9dc3945bed4c21250b6befcddcc95dc397. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBLBA1200352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa097862b64e5b1d871729e7ba501c44f8806c5e285845bc85204b35dce4ef95e. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/GBLBA1600450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ac42f5733288d84d84873d3dfa4962d8980e945bbc59f56d4fe31d7491ad5b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLBA1900488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b25fee0cf7088d6cdb3ce6fa307bbb5f5c4364671d758978a515431464a6f66. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBLBA0900265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee08d7ec3c8fd00f0e2452b7067519afcb2e5afc16256bad97267ac8adb470d. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBLBA1200361.