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 0x99c5096dc80f1bb16f42c64a70b4085afb86be222d1d018b42f4bc4a8b25d6ba. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21a12c94-3c60-4537-b730-a37ea53d59b8.json and https://artists.proofprofile.net/proofs/artist/21a12c94-3c60-4537-b730-a37ea53d59b8.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 0xc085975f6d86d3b041982d3a3780f84e866671fcdb2065940144b84c211d7bfb. 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/NLG3W2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb7a230db8d088507c1878c1f4fe7858eb7e82a9decc0909cf2b402a7d4a435. 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/NLG3W2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7895cdb436566b18b0cc6af1d4d568c485064521f24ecc43e78bf4d1af4e154e. 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/NLG3W2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee5ffc64b2449f36be8b6d2b6e5fc461a27e602064d57df4c47138e02de3d30. 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/NLG3W2300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc709d795e364f2d4da8062812605961d86d20e994ebf056ea7f5c2ace4edd95. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLG3W2300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970e634a7a76fc325407873dd8d710ffb629232c89db2bc83889dfb0bc764221. 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/GBKQU2383311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dd52cf41461d5aca9c0cf11eb0429d1f5c9f34f6b134eeb520d2fd477c9e0d. 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/GBKQU2360193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296f7dfd824a532f13a6bd964ca7d9e57afeb503150100d8cd2d8fa7da766c60. 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/GBKQU2312318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c354aa3095db0f79277ae105f5db3bde4afc775de8eedb1712c997b1480c7b1. 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/BEB682500741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde31d2f447b89b071c500f0930de487194a73257f797d3ba9b6af4f357723e1e. 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/NLG3W2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef9944c1ebb156185e0d1630ab9a777987bc2b90e7f61f3f58912bf2b71fb74. 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/NLG3W2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706980e926f8999f093b13cfb865335b0373da9c38c9b70e01d61f035a7afdf0. 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/NLG3W2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53307858a990e39eb571c5b7d7060f48ac986053dc5dbc23eccd0a27c665d12b. 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/NLG3W2400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53307858a990e39eb571c5b7d7060f48ac986053dc5dbc23eccd0a27c665d12b. 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/NLG3W2400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23f26431faa9df20f921041a0ba96b12eaf6ee4f55ef22c33129e21158d932c. 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/NLG3W2500039.