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 0xf8e6c85e33aab3c075cf8c3f6d10287ad68d13a1d146b28e38e9c48ff375c5db. 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/3976b23f-2582-4ec2-b0a3-5ac584affd86.json and https://artists.proofprofile.net/proofs/artist/3976b23f-2582-4ec2-b0a3-5ac584affd86.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Never Trust the Holy Gracious Medley Band
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 0xd800c8ed22ab2ad53fd1e58b16ca85c653939e6bfee548ed33f746b817158fa5. 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/IL7112001078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14db653069ae8d2fe28702de0cd7f43827a01eb44aec2c511714f12efd353851. 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/IL7192500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711246bf1e21052b654d3280bccaa759f7d778ef89fdd704e44a9fe4c07622e9. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/IL7192500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4915cb404c9de4bed67e24002205a72f6f40956dad60e1856bc95e2f49209ce2. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/IL7192500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e62e8b2d7768a27e274031bfbc7d9a422c5f9da2b08ad9b9fe9a3f41f89935f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX762536224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99757f3b6b2b85fefd2e944a2c3b87a7db5817e5f1574770712bd305b4cc782. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX762536226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f3bce9fe6c41e913af07754498dc3d6889266b45cce8722a7bb4c93fc957f7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL7192500962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd20e4d420a7be4426a8d571c44b1469bb23655ca17c612d6e2205031d5432c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL7112001098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf131baf847cd9d77035c6f26c65a8e75b59ebd0e56cba1132e247528230f6. 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/IL7112001153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5064c5e085798b90b81f23c7fcdc4f0e0febe125b2aadf315146e064a49a504e. 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/IL1041905209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a07914ffb6b60dd4090bcfe865ffdd4f120d815795d4a9261f85c59f19821d1. 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/IL7112001180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6add911c5605ac2a1ed47c56f45c486887ed431f44ed4a01b081500d9cdf534. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/IL7112001282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf131baf847cd9d77035c6f26c65a8e75b59ebd0e56cba1132e247528230f6. 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/IL7112001153.