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 0xeffd651c2973dc4d9534afd8005d8aa20a310eeb3edf114ef928f23ae15bc26f. 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/4db4ca0a-2c5b-4a7b-9f9f-ea3d0251fd50.json and https://artists.proofprofile.net/proofs/artist/4db4ca0a-2c5b-4a7b-9f9f-ea3d0251fd50.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 0x3fea7078b0ef926899b45d0c4b8c380b2897c33fd99918f405c92f001e9514bb. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USA2P2029299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321b3521c6ce1007c25f0ea8114007d3d9d01f539e19a8ef2b59435385fd1fd0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/EEDD12000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321b3521c6ce1007c25f0ea8114007d3d9d01f539e19a8ef2b59435385fd1fd0. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/EEDD12000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b83dc799eace716756077466a68360677f76ab19eef1d8f14ee4301d1d99ef. 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/FIWMA2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7dc85b05af1ec4d2c7736d1fa669b745e29cb3b180d756d8b1e05ea2c6f420. 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/FIWMA2200385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8df6166d9879e4b08c223fdf22218dfe18dd7c529fd8fda766035efd5d34c66. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FIWMA2300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1b8bdb0bc2ada889a4917010dc1a6422f25c9615f35dfc7f492bfb88e4ed4b. 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/FIWMA2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79448fe5b149473a26e0476be5353c519c8a2d4406521af634793405089b4cd0. 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/FIWMA2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54bd6729e121c2502e6daf0dea479658d8072d293f2ea9fe9bbff944fd73bff. 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/FIWMA2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3741267d7e51e3e58756672d28f6bd352b72b4c5f6cea918696b13fa0094fad. 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/FIWMA2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e93858df6216939726e6012f64c8f97c51d8783ec98bfb7371e73d7763f040a. 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/FIWMA2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ab40bf2e7d7c32e54041f550f0b55ce019d75cd53a853e5beb803941e170f6. 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/FIWMA2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8712760d8f8dbfcea4264aa218509e31bfbdd5d7b8981be8280d375cc1a439f1. 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/FIWMA2300620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd232f3a7ffec7d62360eb2b4be1cce5a215e824c96ce699324e9daef3127d99d. 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/FIWMA2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0bbd774a40f4266bd5ef18697e6b7f41097c5a512fb7e103051ebef9437da. 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/FIWMA2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ef9a197cb61f6fa382783e82453fbdfc482a1a58befd21986503d138709e37. 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/FIWMA2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb352c9135a3428320bed4d5df83d8f850373d06fc095e8225f3c9df282abf73f. 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/FIWMA2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef9edab9baba980f4d03f1295d9f5562c6b0d50d75a9f4772d26888d49852e4. 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/FIWMA2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a02f1c1133cf79017f827f97746665cd25cac3299c3d193095d516a9e5f941. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0S2422111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465def8bdbee0639172acaf055b2d2dd7d6b3cb7b7f7a660c06fc9ee3a5fef97. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X42512799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf234cbe9fbf94b466829a1fd39e02184c8b3503885a8fd33bc0f6230a5b4c3f7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR2X42512803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c35fd984351d0f2147d2d241b1f141d941a59167ba19f61ef596a29f220264. 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/GBKQU2500476.