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 0xf32552bf83c8a46092c0d3e1ba28d48a50842311bf0d09252184d23120e78a5c. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd9f8ecb-bec4-43f7-abe0-3f475a22fdd0.json and https://artists.proofprofile.net/proofs/artist/bd9f8ecb-bec4-43f7-abe0-3f475a22fdd0.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 0xaff5cf009f729a9f936ea0f273cf2d0c9e93b3b9762431d5ce515ed61c3a6c82. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USA2B2404789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f7efbdfa5a535853c1eb6ba75ec47cd8d7c8aebb1c18c3bbbee7c351457f26. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2B2404793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875176607199739c5564536d930ee4e81e3411236fcde5b8d6a2cb5d33a2c3f2. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:04:26Z), 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/USA2B2404797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbaaf5b98325253e123379cc300aecd4748978a434a53428828bcbc3e8f3d45. 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/USA2B2404798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6fa89387975792dd2454116dcd5a69b371961e9624a679e7aa7a309717274f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USA2B2404788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebe7025ef9060994136faa70789412a2ae50f1479b8e6f9d072967c0e3dcb69. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA2B2404790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478c397421adf2050e2f6bc034ecf9c3d7a3062731a898e9009ccf0e4be42743. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA2B2404791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5945bbffa9ecb775c0052633a8c1b441b37bd5836a59e53d11fdf1d9cc47ef4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USA2B2404792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172e79fcd7d38a4ba39576889913c0d8d495bbb146395319564913ea90b1d51d. 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/USA2B2404794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a4f33454bc8a02193a78360b6601f82aef795fa408109a7ae483aafca49451. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA2B2404795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4523130f75c1a355e85e5225d524429b7bf8ac082007692a19a5f29557e3d6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA2B2404796.