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 0x6d3e66c7dda8c5352a05b7e6fac544db0b488925493905a7549816185c64197d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b59ae806-ac7b-4e7d-a357-30789fafd701.json and https://artists.proofprofile.net/proofs/artist/b59ae806-ac7b-4e7d-a357-30789fafd701.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 0x645a76fa7b1559da81c3fb7eaa3e1644b5fbb36f40c572fc4833460b05cbc732. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FRX201638111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae579addcb35cb1bb9a59f05d02f1dce5eebb1e1cc2b67e99708aeea5a69a5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FRX201638116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc15c2a62e1b2d6a85b11ceb5895c5066fa86b01c15559780922b70189ece28. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX201638103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f638ddc0239a142c5f5b275636616d67e874d62e33841c2fd5c864fa06eac4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FRX201638107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c3802550efeb254ec78456faf3b85e551226aad614c61e2636d7103de3d7f7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX201638112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae579addcb35cb1bb9a59f05d02f1dce5eebb1e1cc2b67e99708aeea5a69a5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FRX201638116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779142e738aeff9f76b8155767b2e577d934ccd9123af64dbf6345f2f5b0cf95. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FRX201638105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae579addcb35cb1bb9a59f05d02f1dce5eebb1e1cc2b67e99708aeea5a69a5. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FRX201638116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfc516b03fa0a42a0100028a7a9f0a6adf5f24c0d0908f97e35f05c91336a3d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/RUA591303076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085621bcd7269a077108cb6e519264b10f8337af8c13c275c8e17e50b947edab. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR2X41956755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e993663a47a44d4247b3db90fd2d35f4c9bf89bb898d9ba35a61623bf7b473a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/FR2X41956772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bcb4a0d90499f72c7b14338d816bf1cbdf67577b2fefceea5065df1bd25815. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR2X41956774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5bc379f3c63bbace65fcc0d70f71485ae0852b50492a988b0ebbcb6d213301. 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/FR2X41628275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7773488e586f4920b8e26fae46dba12d634b778a9627bea7d0b78f4fff59c49d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR59R1663681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe1ee7d84d2053a0684d385a7f77d3d78daff6b0e3d5dc724a80da1fc40dfe. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DGA0H2338146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d674facfd3e163f2e51bb1b766f7224187a019e68cff15f746f2b8213fca34. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762090669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699382fc445df59cbaed39a6db8784a26dcb06e670d1777767123d7d25141694. 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/TCADI1766452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae14f1658a3c1be301f3ab777a3d581256b66f6130f1400113181365c54f4f35. 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/TCACU1634894.