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 0x504f6bbaeb31cfb5d3ec5d304393f40d6972532df0d9b63d49e1d9e7dae24b1d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86da28ae-808f-4113-9ed6-ad8b54848c42.json and https://artists.proofprofile.net/proofs/artist/86da28ae-808f-4113-9ed6-ad8b54848c42.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 0x3f4493cfbca50601b089ac63a6ef3699bc8a2ef819261ae7309e807057c1abc6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:49:01Z), 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/NLCF11000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf21a5a5086b25339cc2ac078804baa9b9075b52805f92cdb24b89ae350626e. 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/NLCF11000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5371bdd35f5b648b99b0996415e68ad508fec7092bc89c2f7ced6810d211a3. 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/NLCF11000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc0c20343bff46eb211104dc541cc20570b746305ba24df82f1fe7883c6fb8a. 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/NLCF11000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b50b564b29b3726a008ab45df64c30fcef159ee41ba69ab317dc24d5c83952. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLCF11000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a1273149be9a80be892ac9247390dddd343c2b1c7f436d31a31c05112a2032. 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/NLCF11000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87e9702d32dc8ad239ef062317ec0ef30ecf6d726952f4d2ee6bb4ad59cc0ee. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLCF10800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa116b3184e8a973f07af5b4232f37ba35c6017bb4433661c1374c856d09a4d04. 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/NLCF10700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e22a0021326a24363e597f750826f5e3cdd8f4f539084ebb93ba2e45f1ffabc. 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/NLCF10700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bee68e722c8b73de2fed6fbeaabb00e7dbe6fbec1b056ffb3796b0b385d2c4. 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/NLCF10700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f9cb1b5946d4b30d3127395c6ab22e2a05e2ba9a4c28818fa4f9905c814940. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLCF10700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434a2b6a2f3b0cf2f2de66c5f21852a7f96f3bab39f3900f57753241207809fe. 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/NLCF10700038.
Breathe Sunshine - Black Sun Empire Remix v1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa382dc4e1ab93eea8d2968b084b2d008d54bd7888b73dfcc950c0693b0c736cf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLCF10700030.
Beautiful Morning - Black Sun Empire Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eaf1410977f99948851fbfac3d902dc3402b260e5ffc44882764ad400fde4c. 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/USA2P1272582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59cff424f3d11ff7a33eb735ef26ee6fd61b7dae075ee694426b55efc4a9086. 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/GBQXF0530045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6773b1d1b3e9dfdd8117ac0501e5c4882e2d78285391f2250abdd1924dd94131. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLCK41000118.