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 0x071d225b9a546f857ed511ce80326d303930ca1b8746a267f104bb1e756790e2. 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/86baeb78-b19c-4a8d-ace2-c0b58889e5b7.json and https://artists.proofprofile.net/proofs/artist/86baeb78-b19c-4a8d-ace2-c0b58889e5b7.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 0x45240f18e5526fe3739f291e98f5d62d037d9c4aeb19149f85c6119003fad3ce. 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/QZUNA2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e0f918a68a72c2bc13da7253c0d39d90293f2d5f877f98b6ddf79b717a1035. 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/QZUNA2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de1bed33c0e73fc17948ca440536b867d87acb7c3de9e15254924dcae74d1bd. 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/QZUNA2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e3cd9639e7c66f804469f72efca3d1f7cc33e27929a003ae62bc86577c9110. 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/QZUNA2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aa81cce89302be3ce0b278babad15f85b478bf1ad11b02c63f2ae15e89570b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZUNA2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cd66dfee41e3878c1745159ae2eda58a0785bdd4432e2723f4283314ee0c5f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZUNA2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d6f2d5890f7d7fbe13448dcf4857119b5d3759e916b7ac32daad4ee8b6b01d. 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/QZUNA2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08684a0df19f6b160a5f68f619bade6d1fbeaa24b06c1bc350f79c0203ddfb96. 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/QZUNA2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9bc933507841db200daee1309811953929ac67fde10a4c6e909f346472af7a. 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/QZUNA2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e3cd9639e7c66f804469f72efca3d1f7cc33e27929a003ae62bc86577c9110. 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/QZUNA2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aa81cce89302be3ce0b278babad15f85b478bf1ad11b02c63f2ae15e89570b. 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/QZUNA2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9bc933507841db200daee1309811953929ac67fde10a4c6e909f346472af7a. 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/QZUNA2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cd66dfee41e3878c1745159ae2eda58a0785bdd4432e2723f4283314ee0c5f. 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/QZUNA2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaffa00859cb6339edf8efe8ab5e7fc74fca6baecdec00e073acb0ebee2fad21. 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/QZSYP2107217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2285a1151a620c5bce8d5c57777a55ed431be1cbf52217903e108bed133f637. 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/QZS7J2165971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b429a47a0c571db0edf79b1a96b54f0cf476c2c0d5b205a503568f8edbe73a. 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/TCAFM2134626.