thumb|right|Henning Kvitnes Henning Kvitnes (born 13 May 1958) is a singer/songwriter from Tistedal, Halden in Norway. His debut came with The Ice Cream Band, but he later found bigger success as a so
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 0x65d54bce30a53d493cadfeb5cbd3f661f6261469f34c12221d7b2e3b901c701f. 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/987d690b-fa98-4f7c-971e-aa657246775b.json and https://artists.proofprofile.net/proofs/artist/987d690b-fa98-4f7c-971e-aa657246775b.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 0x879054a78cdf9008f2a67ad9e1a4ceea543abf4f912e08d72523fd33abe02ac0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOHKV0700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bb4a48dfd863760e5bf9a5dfd0c7292b0b32442c52d27080aa20c527366b10. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOHKV0700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc192c2f053e105a5733f48275f49b79917244ff99791b9d74719769abefaa798. 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/NOGNA9798010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250b09d052a1735f1797d7176e003fe883a29280a5c8baaafa65fc4a81344f8b. 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/NOGNA9798020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44237e5caa49bfe6a12f348c17a3e9f463f48f241cd7c31809289da39df8ae1f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOGNA9798030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc0d3c65857cd9492498cfe935246de648d7a9925af9591984891d8e3139e86. 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/NOGNA9798070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e0747ff57f2aa2175c2c5bdd3d708cc2c74344ea353283f527400ab69dd5c3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOGNA9798080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb23530cffac54b07d6509f2522b549750e88a95fe9d1f6c615c4ebcb562a5d9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOSHA1801050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b492380155f3badac1bab73819f00c2c41932524cbeffd8cc88b5e16d593a6. 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/NOAFC1100569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c816fb9125ae8d2fe0606b57ab76850427e7e422e9fe41b0e33ce614c4308bf. 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/NOAFC1100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6190ca17a0820be9a4bdcf3c97ea1c92a8c9ed3e9bb28e645c6c78b4e3b1df71. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOHKV1001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5853c9ec33fca44d7c6dc476699f6dfc6944d02864ede5dd1074d684a1d248a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOHKV0601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70a4f1b125f9266c06bb6a02d1ad7d93d5f0de38309bc4bd7eb566b88c8be58. 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/NOHKV0901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879054a78cdf9008f2a67ad9e1a4ceea543abf4f912e08d72523fd33abe02ac0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOHKV0700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce1a4c6b91cb1090b436466d93d702e7d848bf6d3a35c8735c8859ea852d137. 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/NOHKV1001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9573b8d8ac45b7626cf4da8651133c22da63935ceace15e4ce9fed01979609cb. 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/NOAAC0900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baeeb24ce24fcee9b613ea4a1134f9ef7ae61108ab20c8e7d82ee565e231de2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOHKV0401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9573b8d8ac45b7626cf4da8651133c22da63935ceace15e4ce9fed01979609cb. 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/NOAAC0900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5853c9ec33fca44d7c6dc476699f6dfc6944d02864ede5dd1074d684a1d248a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOHKV0601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baeeb24ce24fcee9b613ea4a1134f9ef7ae61108ab20c8e7d82ee565e231de2. 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/NOHKV0401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f890ec4c24def59bb645c4c20833007d336c7e190be8baa201a1a71884b710d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOGNA9632110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd098c29470fbafd5073b66e73e52fbde800c472783ac1d26e7ae33bba315f52c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOGNA9632140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3658a6649323f0b9d2cc7cc4bd79c614c7c89b150881847d69c631bb8729e70f. 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/NOGNA9632150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205e2786c0d9bb7b0e52ad6ba133205b8f4e50bf9e42d23903c03a548d9cb62c. 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/NOADS9505010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f7c2fd2593b59c692856c7d238b6252bd759d743d26b2d846e916571267f89. 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/NOAJR0800123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb870564c4f84e70b1927cc498145e7ca4915f76be9f8035541945ecb6470be65. 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/NOAJR0800125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dd07f9592bfdad28c9eba2d9d4bc2e98d4ec032b9b0ea0c8d6c6ce60653fbe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOAJR0800127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bad58a091be562ec012629bc395697eb87295d8d64bc888b82fb59ece28ffd6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NO0WQ2307010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7741db79c7813d76be67e01282489be193456dcb7e59637bf3740b374f9439. 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/NOSHA2201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1f0d7cec487aa0fe1d358bf028b1a37c3cadfff80d098cbc3624e341c88fe1. 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/NOPXR2104010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e551e76e830f9a687fcf0789f9deea7e57ad582e8d530d8fed07b97eb3447b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOPXR2106010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c0940685b1c245a2a30322a0eb112062f0e20d92c8072b66c4f8b63a956724. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOSHA1701010.