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 0x27d4219328c8825b65e8dbdd68af559514db3c0b0fcce498855bddafef979265. 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/eb641b19-7b99-4813-9d5b-aa8d3e27ec1f.json and https://artists.proofprofile.net/proofs/artist/eb641b19-7b99-4813-9d5b-aa8d3e27ec1f.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 0x7917739a60c3dd7adc2de92a41607e40f5183ee667af9e8aa27357c4e18ce05a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/PLC062424576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b10262d022621f7428514fe3ee7988a961bd06948f6afffd5bee59382f8548. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:11:39Z), 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/PLC062437674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b75c9dcef702ec1c9e0866f6dfd228271646a4af4204e71590e4b9f331f124a. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/PLC062508935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d81c8ec6b71137272eee6459f845a97ca34ba7e7a5d1d3fc82c661f5c0d3b00. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/PLC062508936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ba23404f7465ef137332f6a2e771f6956332eced3db9a11eb54ffa68916067. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/PLC062508937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59998d5d439b1dbe97882d2dd16969acc99f8ed625bfaa9d0ec5fb718bbeffcc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLC062533666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f22af1ee5b37a685ad49dc6e20a0e1fce326220da7ceb1c7ba1b71a3cfcb71b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:05:31Z), 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/PLC062547898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e858d6da876fedb1befd9c5f67cde6068f138287bb1c93fc3f36140bafbf04. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLC062547899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99be84292d5747e3d669f4d6b2bcc333ea0c02fbf01a987844facc9e829b8224. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062547900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe1c21a30f759c837b3cf9898c4c2b0b40b4c40ad680db54606b69c9467a638. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLC062547901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c443ac0f4f717d2c12e73ca3f82f4bce2361beea6fc52444164e575b9862ed. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062547902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f90441c1a4ac1a0ad5bf1308eef24a0e0aaafc981ea50a56a077db348d9b523. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLC062547903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe998b98f0c27543c44667c1b50215254f567fd65e815c8d197afe41c6f64ee78. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLC062547904.