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 0x593de9d727d79bdaf9cc761f8f4254222246c603c45bc130ca8710f4c0a40b95. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b23664f9-80d7-485a-8a9c-43ccbcc5c52c.json and https://artists.proofprofile.net/proofs/artist/b23664f9-80d7-485a-8a9c-43ccbcc5c52c.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 0x12ef6817b538626ca4f013716339c921dd8f41c463dd19c710bf3e23db2231ef. 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/US25L1000960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7469f4f28f9cad1618355ff45a709afda99e9066b57cfac58034232e03ef11. 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/US25L1000963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc045789b30ed9f67c0eb33d5fb357d0a0844990200879e4b91e8007ce4dbfc. 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/US25L1000968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6fdcea6bc4831c43ad9ab7f01c04ec447577ad60b7d3d0408d4d179f9b33d8. 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/US25L1000971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96672d9f46c1820b7c4f47044b10153673f4cbd511f544344f2d953a722cb966. 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/QM6MZ1937024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7daa55b8a8c4bcc60e2f9301c107bfa434758d47a24dacec469b65b5a33b29. 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/QM6MZ1937027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbef85a8818cc595924f7c3d5e00d676440479b31537486a70ced55a80220b73. 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/QM6MZ1937028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9092db6362a658de698b7ae2309b354cb8c57c0bbb27ac74d9eb37820fe45060. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6MZ1937029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28de865ff7a39c35c295e290ba259d0c233df254e796dca37c483154b6174470. 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/US25L1000989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaf5955705c59036942032ee831fb29897d0a27d5df3143ebd3c6aa24f871f8. 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/US25L1001000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ef6817b538626ca4f013716339c921dd8f41c463dd19c710bf3e23db2231ef. 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/US25L1000960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7469f4f28f9cad1618355ff45a709afda99e9066b57cfac58034232e03ef11. 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/US25L1000963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebec785390d55c5d6d024ec299a3d33039c52d288473f113f2dc5138d4c6c4fa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US25L1000972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acf455fdf3f4e37bb129ccef4bcd5cc8df31f9f709c171a40aa5cba74a1b11a. 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/US25L1000973.