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 0xf099a27e8ba1cf0623ce3229217914386ee84de6755a23ed99decf0461d5e9ba. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5280f09a-1f8e-49dc-9bbe-03f2eea70570.json and https://artists.proofprofile.net/proofs/artist/5280f09a-1f8e-49dc-9bbe-03f2eea70570.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 0x685c310c36cddf174471f152f9bd3371c475257b1b246e6e9e2957bdad201044. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM7282062860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0198352142db126f5c2c223038c4bdfb39f4b733a8e551fc174a874f48eabfd0. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QM7282062862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2e360ad7c28e377b301d2e6aa4ce94bc7f1f521841fac43d7302e6ad29a38e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM6P42041417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb2bcd468fbfbf782ef931eb0786acf6a07bb690dc8eec8eea454dbaadbc548. 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/QM7282063634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae0d77d77b2c3b12880ebfee7d3f912fdec6fc8641d8bd11c0a23534761abe1. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QM7282063666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8acefc3049e448e5b3ab99e280ecb7a91ca0ea6f017757dec83567db7f4ea39. 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/QM7282063671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc399b531c372995c27310d1cbb3c653b474c3e254c8f10c8eec0974a39fb78b. 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/QM7282028592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851d2322526f244c74f6113faaa5f4df0b23af8b4f408837aa19b45d7473457d. 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/QM7282063673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d38716470804241005949c9ce2e362b623a4fdcf7c71e5e1e37bbe648b2bc1. 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/USL4Q1903956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74ae78709b65c387019bc398241e0952ec064903e87c6410344378aa88e57d0. 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/USL4Q1903957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2705fb1a0c61132d6f0c6839fc4b64ed43a8d9ae654efb01fe2a37d99fbbc9. 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/USDY41992301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd7d7953a064ce6968af0a8f02b2a9251d55b794429a7820a42134b5f2c3eaa. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USDY41992302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97fb444227e1fc0bd9a0d2bef6cacc1550c6002136becb67f9174a1fa27d40c. 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/USDY41992303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd715b926ea5ac2f808020e907246bda5208f1674c7949999db1df99fe2074e79. 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/USDY41992304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb301c45656ddfaca501f4b975d089e135fd1d70c635c29ce0c78b91eaae36d5e. 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/USDY41992305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7342e30fdc27055cd41f137cf8f90d7543195e4886c00c6a7f3e7c0bd1e177c9. 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/USDY41992306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a853bd36c063dd833c1dbcc4ba0e5b03bcc3fd426af65dbaa81c44cc9681fa3. 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/USCGH1926886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8188fe9b815dc0b758e31dbc78273c2222430d3ad02ccd8b05a2674e5578ffcb. 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/USCGH1926887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6416bb5afac7622ef32ec83e10e3fd10e3c37afeab6314ab84202016ee971c34. 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/USCGH1926888.
Alien vs. Predator vs. Brown vs. the Board of Education
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fd49356359cd52de22d8a318fc4e2c71e8d1b5be7768c32df7726745e9a2dd. 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/USCGH1926889.
Stress Eating a Box of Honey Nut Cheerios
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf67b3a126d0f53ab315ff65e8fbb35e75e704aa23f4751eb7f4a56e82c8d8ae. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USCGH1926890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c227e0d4905b4423c668616d9b3023a512bee2d2a6ae286b4901d54d1cbe35. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USCGH1926891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c2d39cb3762691471b114211ada0cba0f77b4458add8a06cac9ec3e075c847. 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/USCGJ1874225.
Dragon Ball Z Is on Later, Do You Wanna Come Over?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8bdfe15628a55b7c70080ab3db2b13e4ddaef39fb31b424bbe65e00e3a095d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USCGJ1874226.
I Stayed up Until Four A.M. Playing Pokemon Crystal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557d877159f91677639ef7c177954ca399ad2452ea344df1a406bc8a4d84bc98. 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/USCGJ1874227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd98eaac624d91ee2832f1dd78a204c3e5af345d51d2a60242af9ff29cf277e. 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/USCGJ1874228.