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 0x2479a9e2fa2b316eaf471fb4e2d319d82570796b1f7501cdd0d2d006e5adffef. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef14de0f-7f6c-4a8e-881c-bf303176fb81.json and https://artists.proofprofile.net/proofs/artist/ef14de0f-7f6c-4a8e-881c-bf303176fb81.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 0xf15dbad0ea8fd8c7394c2029cd8fcad17fe1cc4af57754277ebfea4fb0b662e5. 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/NLG661900263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2b4c7c49814716cb3997f1a29abae68bd7a039109db616e4f08b6531067429. 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/NLG661900264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49a38e009461488aa418d90a8f5e70f74a98ede9d4a3dd7a78bffbb26388c9c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:36:39Z), 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/NLG661900772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d90e94266a85277fb090a155ab171223a38826823a8ce8ced5e09f42d52da7d. 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/NLG662000671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18467f0ead39db9593a4e9a77979a05b86cf10053aec76a4ad2e85b17f0fb6fb. 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/NLX1N2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1ad1623d084cff4383bcbec5fb654b755603b66cfc5325f2a65da3ab8b57dd. 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/QZMZ92269725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf8aad03676cf98ec1fff18142cd0ce1dc400ed024fcc7ed20e9350c68175ff. 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/NLG661700927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c26721ef7ebaaaee9a3cf7c051e7728db9691d9e243f1d7c7892a66ca22b2c. 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/NLG661700928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ee51dd2b518a8ea3eda40d935d9a581141084ac9add3e9debbf310aa8ef1b4. 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/NLG661700839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef75467518bf2781a520c8f94e81cf55d0b693f4d0fc5c9ff71804edbe36d99. 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/NLG661700929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc23ac9a422da6baf125c31b3e95dee9164e3835b61932fe1319a58ae44cffd8. 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/NLG661700930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f26d6643fd1401bfce6a9ef7122b3f5c7e041aa0d9bc2ee238ed84ccf09e06. 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/NLG661700931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887e78dd345966be39b8d7b3fbe1d821d0e0439e7c126e36a10c54a5917a0e50. 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/NLG661700932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc7d16c965dd5992c56a8c1e59b635fd1f4766e8832e4fb320d11018766adba. 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/NLG661700933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f88177fe484c3a02d7abd4ae1728d2d998e07cc7ef27ac077867b1393a1fd9d. 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/NLG661700934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecdf556f71b2510beb37457dbab911ab16dae6bf556eff8351fe6bf1e87f0bf. 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/NLG661800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0854683c55fbb06de7256ea192d5e41bd5769ab6eebf73f9402e7b4db9a32d97. 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/NLY9D2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de8c5f4fde61fa180481c72c17c020b9d394099e2a55dac7e978d6488924472. 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/QZHNC2176756.