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 0x2848937a3bba5a4efec3c8309006f1e2e9fa14925da3973e5c2edacd17c41ce9. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a72aa09-c054-49eb-b69c-0792f0f33ebe.json and https://artists.proofprofile.net/proofs/artist/9a72aa09-c054-49eb-b69c-0792f0f33ebe.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 0x41b89e11733028b87019d29474122f47b925d0ccec50963984e3dbff413eba90. 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/BXDIP1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4149358bab130d8d79ae8e4c396155343c3eaa5287e6f859925f16d2e62d9fc6. 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/BXLYA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6b0fbd494d62a92957b52cfe51ee34ede07bff3ec38fba4b6f0113320d3996. 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/BXS8W2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb0d3cff49c8cd64056f1621e34d4d5bef584377ea138f867b5a6e35a4db1e1. 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/BR4PS2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6818486e1244a0d2cd9be05f6e3c59483f4178981e59abc2219110238b536d6. 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/BXDIP1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e0e7aa16546a2a6b01630d1f01c002fcd95fe90d14159c4b82096e85c33299. 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/BXDIP1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7530c5abcc8c942d7c626b4617e8c6dbb28c0cbaec8b5a8b6eadd4aac90fa3. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BXDIP1800003.
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 0xcd4d6f44abab7ed63d7b3ecac0b58b3bbe646d7e2ba6509683936f5de16d7401. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BXDIP1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc8b706d2d8fd0a7463b68ed5fbded8e0237172c249ffb1df38f26e27c4a7b1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXDIP1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf595ced01ab5df11113f39e9bc4856f7c42edeec3267905aa73c52cb16f286ae. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXDIP1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99515796047dcbea985c43539c8add475c4d0c1d8f80b9257eb9507bb1e5425d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXDIP1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e4cfc4a8b6b85b6197c6f1a7841acae264ff94f671dd5f4e742be71c51a3af. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BXDIP2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e02bb3389aa14fe5704a3435c614703c55d434713009073107e48e8e953231a. 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/BXLET2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85119098b70d2f80138e185c4002b39e68e6abd3b1033041f20b25594d8b9926. 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/BXLET2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6ffb739df8e0e6f8a6aacda6c09678487d3c88630bd44cde0531d94529db3f. 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/BXLET2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84562317fe9828a8f21b495ea5e881d3584ecf83c349ebdf3b556a7fd334325d. 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/BXLET2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d14bddf78d828e64f84d75986ec967633ed64a29925f195df90f125f3689e6. 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/BXLET2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6877d48a616ad3ef387533afb7dd1f0ed1d81d3a308277fe0c147d74ac6320. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BXLET2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5f546f37d4c9223270231daefe54bdf2dbc0da286d6f2f6f3c7518d047883f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BXLET2200020.