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 0x677102feb82c7c5a77994c2702561c28499194ddbb5159694b6d2d8624316291. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ead2240-daf3-4e0c-8c6f-55f96fdcf594.json and https://artists.proofprofile.net/proofs/artist/3ead2240-daf3-4e0c-8c6f-55f96fdcf594.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 0xe00daaf6fcc2c8fb34a7da9e2d2c3852e6e8c0524fe25ce17f25678b1ac33eae. 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/NO2J81503010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5eaf6cfab100b537cca4762d9aced48eb4499f57875304ba60a26b275c1327e. 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/NO2J81503030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a50b56a4f8147719d1ce3745440355d86984dd01d20863955264c21ca13e42. 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/NO2J81503040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09e3c30420c288b8afac3e6f51ca96870e20f10dfdc47ee0548ef4a52abaf69. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOMPP2007010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c49505e0a5ef1f58e712fe24670e29cdba3452460fcfaa991e81dfc015816da. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOMPP2007050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb802373029930713f8fe61f7bf215af448a4c6f4f5f4392af82bb661a67efc0d. 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/NOMPP2007060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb6ef8be17cb01a780bdebd38ace0c813c0ec8ce905f9732c7539c73778004f. 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/NOMPP2007080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e77b09d467151829bc53b7288ab7b5e9db3812efaa9f5a338994b0c9dc2ac28. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOMPP2007110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90dd00769813bb6d3b51149e1e725da496e77df5b3de5b1778470d0613b5c60. 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/NOMPP2007120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1c22b1c5c697cbd4d216815289650c39d14455847b79a87d17ed72395c1fb9. 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/NOMPP2007130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac7ef51f958f8a8f7d69f991ea8313e82d021cd87422216174771db6c863647. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/NOMPP2007030.
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 0xb2509569257f2fc0c6f3aa85a0dbdb88b7204d9ff3ed7226662dfa4769cd91d1. 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/NOMPP2007040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801cfb007ce33722e73eee904a318c98425331b39e21c48aeb568d3470ec531a. 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/NOMPP2007070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32c44fc621ac8b6dc82515e5a22e94ec2d031aca51f3b01cf603912d2772939. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NOMPP2007090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eacae904ab7fb7ed916a115928301d0b32585d361d60a9bd97a6d74a04c6341. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/NOMPP1713010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390a904aae809118d6739362f3aeb527b56f191acc93f0eb649c4b07d71cf36d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOMPP1713020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc219bb31c1ac1fb7db7d5a9bbdf206e9c3fa35a044e1f95bc9f91cdd10c6724. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOMPP1713060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ed9ae0845c5fc27ea12fb41387175fa4dcd3dc6107711f83fed5aecc09bc3d. 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/NOMPP1713090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62935a3307eb166042dca0aa076de11a54083a0462cb6b86657720155fb70e2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOMPP1713100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a41ac9386b43f3df44e78a0bf6ac19ee6c5815af25cd3d72126409f4c58b836. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/NOMPP1713030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39699e72f774e59343871ba336898f60c67d2e9c8613cfba32d8008a19a23d8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOMPP1713040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b916a29ed97663eb7d6096255859632ad3504e295e005142e6d8e7dbf5e61c7. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NOMPP1713050.
Fola, fola Blakken (Kveldssang for Blakken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ce184359e72326bc29ff2325535694a8b2ab300555367910bdb06493b39907. 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/NOMPP1713070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9507c121f8e6e304efd45c85806ddfa7d30caac8aed66adc66c29f74612ece. 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/NOMPP1713080.