thumb|300px|Michael Krohn (1793 - 1878) Michel Krohn was born in 1793 in Bergen, Norway and died in 1878. He was a trader and was the driving force behind the foundation of several important companie
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 0x60b8475d83a799173f29503f63290806e1cf37788479e1ff6d96bae3f48ca393. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17e28f09-2d79-498f-96ff-366d2d0dcfa7.json and https://artists.proofprofile.net/proofs/artist/17e28f09-2d79-498f-96ff-366d2d0dcfa7.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 0x293b4f4695a3a2be441f3bd0edde734f72359a43b47ec502d40874b4059c1b19. 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/NODIP0769030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb639d9199aad2d775f808b670321b52c700b7f5edbea5e0be1314a1a6d58e5b6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NODIP0769060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdfeb25e2b956064d6bda88be48072603a555cc3c086694fa60a381d9dca0cc. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/NODIP0769070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3a47f8895f253a8b61a4cd70331817877b877cc89c3e7498167a962525558c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NODIP0769110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4365f74ee5f2783c74defc41b3e897eb23295585ba8ac93a48eaf742a74eaab. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NOAGJ1881010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a1dc68dd1bd42bef70f56d6fedbd0d1b9b0ed5b06aba6b7c23266eeef2f638. 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/NOAGJ1881030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524914179079fac0507e6b3533a288bf0d2f54082caa143fb89b5c3915736ed1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NOAGJ1881060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d112bd89b5b77b4a6b3321b6e9c958451dd5ca504b210fcf712a9d60d2a7f80. 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/NOAGJ1881100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3272bde49ece69786b91270cf4dc4f7982e1b62f655de6ba334bf65332fd3c78. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/NOAGJ2114101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426c1b14be955ce3b8575e8697df239efafb691db21a382a3bdb703ab20aa8f9. 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/NOAGJ2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcb360437a8c26e0e9b896f03b4c00c790f61dd1b4ffe6555095bc7edd5e71f. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QM4TX2550624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd32f9fbaf221a151f7f2c8290e9c65b419c332506930146c0a2fa714d5d9ce. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QM4TX2550625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c19d6888f9299ea9f80a72ec00bd8fcaeaaa4bfb8eccd75cc1ee847c2d73a5e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM4TX2550626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e0d7db71eeca60e33c3e453d565d4bffe014025658d5e1a42b57ba924e363b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM4TX2550627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bb18d25f87b4e8508757129faac11e3891dd233ccfa8c6087a92348e2fb3c0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:21:27Z), 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/QM4TX2550628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afcce79ccb30f371814792d54b9a487eb938fa388c3880f815ba5dbbb22f4ed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM4TX2550629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1d72a7183b1b2963f7083bd0cbbc75a79627ad08b30bc3fbb372d31f68a2d6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM4TX2550631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1196d7da1ea5ba896122a1b62866541796d264f07d73d7f3a203541f6d267b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM4TX2550632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e86be54f3b500fce9d89e5769276ce920e9808a3e2e5412dbb6f06160968b6c. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QM4TX2550633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed72da74458e1b9ccdc23b6f2e583c1780cac0dc51061ea32866b3ecdad85eff. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM4TX2550634.