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 0xfb6c4659976bfc78784b479e7193549ed62700c4d7b56f99ef53f2f1feec458d. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65af8050-d963-42f5-a19c-85869fea537b.json and https://artists.proofprofile.net/proofs/artist/65af8050-d963-42f5-a19c-85869fea537b.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 0x65b551fbe4111b0da37eddb50137485ea51cf2d6377e51640b6f0a51a8e2cb62. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:08Z), 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/UKEX32363067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe758760098df1b2e5ebf591fcc9b927e80e6c3307f5c4db69e9cdb82af24047. 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/UKEX32363043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d03f7971ff8fc1e4d57eb7c268fb6d4eddb8cbf796823dd74fdf26cf241ef7. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:28:04Z), 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/UKEX32360824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2d7c08d67cdd3309007181d3eb7c382351205aced03e41167f1744e50f781e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UKEX32359001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba37158b5a13c5754ff908db49065b19ff80587fcc5045929e41c6d9d1aeb4cb. 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/UKEX32359000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfebe03a969475e257ecec1c214cf1d18af9bd788882fc22370e02116469354e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:35Z), 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/UKEX32358828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc909f116342a177f8844e8bff2a349d221aa30a133757473ca2b7d85db2335. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/UKEX32358751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139d08c1b6d0155c3effa7d18f3e949c5fe85db260da44f3b7286c36c3878a60. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKEX32361104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5661b439b4d0d4eb9b192f82569724db15209c07f2141e8a56676b2e697b03a8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKEX32358752.