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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8018dc341bf5c8a9dda7ae534ba42d1915120b4e603b24bf11e22319fdccd7b3. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QM6MZ2089876.
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 0x655b8d989d2b681fbb508a34b4f547b2683bf5ad6b4f3860c8d294b4075d8617. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US25L1000961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90bc4da7d1150ca7dd8363094e3f0d2190704cfdd048ffaed566991b8f226d0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US25L1000962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7469f4f28f9cad1618355ff45a709afda99e9066b57cfac58034232e03ef11. 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/US25L1000963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14166c57d7ca4b685e80236cda05453a18708861ccc7748f711f0901e7c019c0. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/US25L1000964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443f4a1097b044bb1b9d7b4dd9bad88b16664c00404b7862de17ce2ed1eeb0ce. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US25L1000965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a995bfbda5654a588a855013413a0521cd9430e4f2fa4b358f80556cb7aaf55. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US25L1000966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd971f218c057fcb4f0ded69790db55931e3fa0e993161c9b14cf2c89b1cf1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US25L1000967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc045789b30ed9f67c0eb33d5fb357d0a0844990200879e4b91e8007ce4dbfc. 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/US25L1000968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcefc599bce1b7a61935805088482b282bbb00e3fa3cf5382bb7d10cd383e13. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US25L1000970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6fdcea6bc4831c43ad9ab7f01c04ec447577ad60b7d3d0408d4d179f9b33d8. 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/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 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/QM6MZ1937028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9092db6362a658de698b7ae2309b354cb8c57c0bbb27ac74d9eb37820fe45060. 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/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 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/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 0x655b8d989d2b681fbb508a34b4f547b2683bf5ad6b4f3860c8d294b4075d8617. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/US25L1000961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90bc4da7d1150ca7dd8363094e3f0d2190704cfdd048ffaed566991b8f226d0. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US25L1000962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7469f4f28f9cad1618355ff45a709afda99e9066b57cfac58034232e03ef11. 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/US25L1000963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14166c57d7ca4b685e80236cda05453a18708861ccc7748f711f0901e7c019c0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US25L1000964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a995bfbda5654a588a855013413a0521cd9430e4f2fa4b358f80556cb7aaf55. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/US25L1000966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc045789b30ed9f67c0eb33d5fb357d0a0844990200879e4b91e8007ce4dbfc. 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/US25L1000968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcefc599bce1b7a61935805088482b282bbb00e3fa3cf5382bb7d10cd383e13. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US25L1000970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6fdcea6bc4831c43ad9ab7f01c04ec447577ad60b7d3d0408d4d179f9b33d8. 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/US25L1000971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebec785390d55c5d6d024ec299a3d33039c52d288473f113f2dc5138d4c6c4fa. 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/US25L1000972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acf455fdf3f4e37bb129ccef4bcd5cc8df31f9f709c171a40aa5cba74a1b11a. 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/US25L1000973.