William the Conqueror (Bates William the Conqueror p. 33– 9 September 1087), sometimes called William the Bastard, was the first Norman king of England (as William I), reigning from 1066 until his dea
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 0x0246ea26c397ba9d9f719af213d076d152edc763b04a1da12989068d26991ede. 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/a7d3c77b-38ff-4d47-a0bb-ee416c7e74a4.json and https://artists.proofprofile.net/proofs/artist/a7d3c77b-38ff-4d47-a0bb-ee416c7e74a4.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 0xdc9c0b07ce0aa1452fb0946629f563abfbccc062b9d8c853388242a2e763acc8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/UKKP22200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56d88b437162455b179f2aaaf3a0ed5f6b9a9806eeb0418f3fa147e1ad743af. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/UKKP22200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4218f95d4ba2b663e3603063582c8ef904f9740df1293977868fbd9d77f4c226. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/GBJCP1824604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ac730c1f71b1ebe21f5aed90c551d860cc6f3c6b9de363d94f028caedd93e1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBJCP1824606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6780c115f699de0d47bc1656e2434d78c94383e9deae0cbc30057e8a53af8fc9. 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/UKKP22000375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae3e26216aa64f95a092f3955dbf25e14ea6d744c39e47556b13a1598d2b19e. 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/UKKP22000376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5565e1f7e2caaa1e6d333c44072b5b5de7cfc06ef547adb0b2aa2f02bfdc10. 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/UKKP22000377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36858d85e066b62e3ae2e396a5789bc4ab25d08f1aa512d87f8b453bc04cb2f6. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/UKKP22000379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121d19aae9a13add0253454de256c9225e1ef5fa4911b13a59940055ef6d6f9c. 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/UKKP22300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50ef7bcb19ea80ed8f695b2186e91fd492ebe1d2312f1db6990b7b5e7a3e57f. 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/UKKP22300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e234f58448183c78d1129894541e1800a67247522f832a4567617f22ddc457. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/UKKP22300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f21e319756f48b61fab93e03e6bb379d72f5da3062c97e46de738d39af00c46. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/UKKP22300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121d19aae9a13add0253454de256c9225e1ef5fa4911b13a59940055ef6d6f9c. 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/UKKP22300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190f32f02681302137d549d1dc87308af3cf6c94ad2b50f48567cad5969fdde2. 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/UKKP22300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029d4747f4ba3bcace986a9a8514a1670c87cc49654448d6e3cd88579afaa934. 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/UKKP22300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd48353d25d50aca716436465aa674da2baf28af6305f2ffeb9f7b1cdeabb393. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/UKKP22300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6ebd9b2368963c75fc911ff29db3863f320db7adcb88d767d31b51a36b5191. 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/UKKP22300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa0b91bd4ad1138c39745e9a5367854c6e8e4679b71401b883ee2dd244cba9d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKKP22401173.