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 0x04c0c78e03bdb54955e7da92ce58f1d973e21950d7138bfdd40f01a0fd60970c. 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/e2d0218b-02dc-4cba-a44d-4792117ff473.json and https://artists.proofprofile.net/proofs/artist/e2d0218b-02dc-4cba-a44d-4792117ff473.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 0xf6dbd7f9bb9dfc135424add589d0098234ce4d2ffc614f41dda681049272a93f. 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/QZDA82535264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77e4c50d0fd70fe5f458081c636d137d764d07e8a2a0a15780b9a2e794f6901. 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/QZZ7S2430452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77e4c50d0fd70fe5f458081c636d137d764d07e8a2a0a15780b9a2e794f6901. 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/QZZ7S2430452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595cad66cdf734c78738beb429717147ad0e412ebd4ed027eafa6ebfdc336ace. 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/QZHNB2379909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10be15e4da1d63a75f6b8587bc45bfa3d2afbdec3dce44d7a18314c7a364bf99. 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/QZES82259969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23592f4ea6c07c7b472f9165afe466b7f05cbd3d7d3b7d3ecf7695f06595a94a. 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/QZES52242377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9d63789fb9d842913e77c5d85ccc6e298e5bc4a26f32cf8817b2858505689b. 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/QZDA42228024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290a1bd489b445721052702abebad1d795707a2b401aee566139cc89c76e582d. 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/QZMEN2145552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3c8643fea66127095cde989a964c13a9a52fa693eb9e370e7bf2acc576e36b. 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/QZNWY2052235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fcabecb68bb36cb7385e152ff7b0446c711b7f7f0ce2ad7bbb4d82b9bf8ebb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6J2054083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e0aa3dd857eb31296c1794cdae295238539b4486cdd550c0b86f52a12e2187. 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/TCAEK1927064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1dc160efd7a6b92a5c4ebdd83bf067f8c1eac782564579c823daa0d15e3610. 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/QZK6N1900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd2b2f358bda1d3be6ea3a3abe11feec04154b248e342accf99d572d206a19f. 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/QZFYY2000380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df0cec92b8976187ccb7a134f1300b387fbcb344de6ca1832d3cd610ecc5c4c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ42099388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb97d7432df95e3fc98d3880f020e5269198f0f5db2fdec9ca50a74fef2e863. 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/QZDA62000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8997eb5064a8ba3876bbe4a9a6210d0ecf7dcf374348b175cdbb38baa089391b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES62098786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73107afd88be1c06ff165f7de51d7c8180aa2fc7337da2f3ba9907423cea845. 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/TCADD1717945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6021643629853595f49779ae5be2041ab89e1832f00aae558100bc7f3be5caef. 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/TCADJ1757609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5a44b2c47ed21787ae6eb29e5f17c00a004d858ecd88719887b452d333d2bf. 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/NLS3R1800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d11e8ddd270f7c71a57be72f2ab8c471849102107b8861d4375b23f7edbda7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADH1725240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89d2dac51df6f00e9b9611d183be583acc5c6f95fe6df5ed6a7acdc72642677. 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/TCADI1789533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f0fb1aad8d9ce9ca1f9af3501a09906204a3f5691aacf536d1086401994bde. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLS3R1800140.