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 0xe1c2ee8ff610ab1597b756cdd99ee51c426867dfd9631c3aa657ee2dd4be5204. 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/52f6da36-0582-4bf3-bb96-929aba0acfca.json and https://artists.proofprofile.net/proofs/artist/52f6da36-0582-4bf3-bb96-929aba0acfca.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 0xd56ecbd993a8b8caf2e3dad9f8442c261b6bbf12f27465c951ff29d05ccbe586. 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/DGA0L2399972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f43362abfc7501c5d31ae015231cfee520d2855246e7fa0e0207245326a701. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0L2399973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83919ecdb4e4482a85260dac65b3c7c2cf509a0b1f368e7ed9a1b971d4ec8016. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/DGA092358973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10f96135c2b6a1abc6dcced154345329b7deec2e0a3a3386a858b2c05029e9c. 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/DGA052304359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d2dab1a6c1148a4ab768fdbbca646def2194b096a989ade895df541c3bf930. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR59R2345373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49700b5fc13bc20070a0f52e8a46b210c6f62d77d46d4289462c135e3fa0d41. 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/DGA0L2399974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12b2ead92f3673abf2a940e3ef27717d7aa8b82a9722a66098bb2a50639d275. 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/DGA0L2399975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed8143a525c224feb1a7d734075316697cdf1ec2d0e2e0e0f4edfc06664b15e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0L2399976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2553194a62f9e841c42e9eb65c094a342e96f11f4344a9ea6237002a43d08c66. 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/TWA451800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2553194a62f9e841c42e9eb65c094a342e96f11f4344a9ea6237002a43d08c66. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWA451800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f0a845502b59370d95d3cd0b2afd20351bed8c0551b9dd12e12fb2af440021. 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/TWA471497001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f0931c48c6386e0176bfac4437440fe3af1602a041f339f0957eec5c3fbd25. 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/TWA471497002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95eb4b00df142b0ad734a78d36bed9966d22faa4e9486a5398e007f614c76cd. 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/TWA471497003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eac05ee5d98cf8daa9769cea122ce8c0c2dba9a293aab73c90999d50132725. 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/TWA471497004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe479969d8e3be798b16f5327d17c67625a8f36beb78883463ed840dca20dd230. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR96X2135776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c867d0ada911f6717eadea071c727f9cce329259123b52284cb818380c1bf7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR59R2159730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b922e4738ef35d62f1b775ab4c29e461d998ea07c9ee66b69e337d3e3ac488. 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/FR96X2135777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d123b2ae0b933373c8b12098e684afd2e1cfb596de0be799f16ac4b7fe93a20. 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/FR96X2135778.