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 0xcdcb9e39c642fa44b0843e0fc7b7eb3ef5cae678ceb9610a0e48437ee97f1c0f. 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/8d15fbd7-6cc3-499a-8a93-b183f0b0392b.json and https://artists.proofprofile.net/proofs/artist/8d15fbd7-6cc3-499a-8a93-b183f0b0392b.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 0x4d881ae52a898eb1d15875c720f2460b092d7064622d3d14f3030fd60af306d4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NOPXR2331020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ef115e027ceefdd3df9f132d86123444b3bcda5b396723fb3be34129096c8e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOPXR2336010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287ec157e0b046b400c0bdf964f44fa9acffa959e24bf294f4852f745f9517ba. 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/NOCEM1913010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1f0d7cec487aa0fe1d358bf028b1a37c3cadfff80d098cbc3624e341c88fe1. 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/NOPXR2104010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e551e76e830f9a687fcf0789f9deea7e57ad582e8d530d8fed07b97eb3447b. 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/NOPXR2106010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8880e582a7e6fa84f915435909146d43f40e65e143997ae4479a76de9af8eb3f. 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/NOPXR2105010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9668b07e828bfe8368cb5dbaf18d06470ecdbe5f350eeb8403ba8a2e622ded. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOEIA2101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcf3aade3f9c749a042ee21f89c555f60cbf18f89ebad980ea7ab544047f58d. 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/NOSHA1801040.
Trofaste Kjærlighet (feat. Trygve Skaug)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36783ad9ebc98f9989becc490eb6ab9204ae406b288e5cd3db3bc90dfec496f4. 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/NO2DB1201070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba432af9c116aff80be574d7b6c9e81c499df06128b0a0e6611c7ec8d4feaf2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NO2DB1201060.
Hosianna, Du Er Stor (feat. Trygve Skaug)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f7e7ef5e60a65b7eda79c393dd56d335fc9cca63050cc0bd2ed1b6d220e980. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NO2DB1201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8085aef860505b4c7cb10e182719eabdaa7b6eeabfb322d7772d60bc4ae469a. 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/NOEIA2102010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aefd753fa58be595bd7dec38b5d1ed009e79488a16f88f9369b8d98511e9045. 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/NOEIA2105050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9668b07e828bfe8368cb5dbaf18d06470ecdbe5f350eeb8403ba8a2e622ded. 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/NOEIA2101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c9c517caac4f80e57fc3cb0cabb01ce20c70d201e71f1c648fee311e97ad86. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOEIA2108040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4663a787bce7cc14b057aadd430638a351e080cafcb314b7e240844b92731680. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOEIA2107050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aefd753fa58be595bd7dec38b5d1ed009e79488a16f88f9369b8d98511e9045. 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/NOEIA2105050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da0340c758b93f5fbbef9b5dcad560b0f3f985f252c41845e47e5f4b209b153. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOEIA2104050.