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 0x2058fc54973f4f3e3eaef9d8331f53000f4a9cdcc6f721e362cf7325a3fb47b0. 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/aac000f5-f8ba-45d9-ae19-96f4bf804528.json and https://artists.proofprofile.net/proofs/artist/aac000f5-f8ba-45d9-ae19-96f4bf804528.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 0xe471872d059364aece3b124894d9be915ba30429dcdf7f3f385f825496913a1c. 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/DETV91500909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df91fb32ceae531150492ca107d2ebe78a69e112f2e2e436a63bcfca47a6435. 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/DETV91500910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfbf8c939e6a0eb5b842ae56159dbc3c3171adbcc14d104236c6bab3ba06d00. 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/DETV91500911.
Hattrick 4 (From "4 Blocks") (feat. Zero.5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd0bd58911139569a8ec8efffd58b582a2257add977652b05f15d5ada6cd3d. 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/DETV91500912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d04c1284db868c331844f56d0bd7b0616ed8ee413a873bc18f8298ef0bfc96. 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/DETV91500913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd64d64a82ea2cd8b7e1295728a7279de13b902ee4d93d4b588c19ec7574bcf. 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/DETV91500914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06229fcaf4ecbe602546e67166fa9973176770b58f23e401340c5e75dc2e9fd8. 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/DETV91500915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3cc5841efd1b5b7ba31bb8597d74b5826a15e443d4ca8bb643eae21e3700b2. 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/DETV91500916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04112ffbf07a41cd7c2060dfdef9bff83aab7c0eea797d685a2c4e13ad532ab8. 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/DETV91500917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa166aebba14f2796368cee4d4cd69a393128607855db3f12bf39e2dde0acc466. 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/DETV91500918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524f23f9614f0ad95f4c28a21743486631c2e14cbac68a250b4d201d74f8a0ad. 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/DETV91500919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867e462a34b0703dae60bba53674bee820e16fd7f5e8b788420ac547c1d57267. 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/DETV91500921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f0df1cc5452cf6d5e03c301db9bad40203219942d34da0f29fe2a24238843d. 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/FR2X41749624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e52aa8466a2a538949e8c1eda9a266bf5cd939513731783c9ec95ac1daed351. 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/FR2X41749625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e232b4c12335c2707b67c4b3e2a9a622f732a6a63323a1a1b19efdc1c41f9b5. 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/FR2X41749626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727c1e990a1040375daa089703b18e089cda24e5d3432c8b9f42c35f8758f945. 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/FR2X41749627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7705892a4532c469b4b1abdc389c88f53fa54c300b4850311bb4217be41846. 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/FR2X41749630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8348a61fcc4429864bfc35ff57e139d31bec41746c209ab59349cc589572749. 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/FR2X41749631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64de23326282c8112f89f5e990870c4a6e1c6a42cd1d1cf1f4edb637b302ef98. 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/FR2X41749632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa075829034c525c22f3b00eefa8f25a59efee47998b2411e0055b3380ea393a. 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/FR2X41749633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200264e5bc32d80f1172719be19d67da04fbb972ab2de33d274a141c01dfd43d. 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/DEZC62386220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db067f2bf6fb0b8707dca492999cee8399d13134b713e206e55273cccc884f5. 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/DEZC62439991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d02916d71fc7e613b6b54a6bfaba6626051792938999ac190d747a97a346c7. 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/DEKF22200573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d650803bad6af1827b27ca7f0d896f14d9622b7e864dd6ed85a204197d4e94. 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/DEKF22000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa00ae8c1de1e2826f2b542c9236e895fca8b16adc209679835307a0cbaf081. 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/DEKF21900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c02d8b60878fe41a42c61938ab0c3dcc940decb0964fe16e412ba80ff9cee57. 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/DEKF21900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62f1ec0e56a93ac63d3cbdb1a80949a343f86d860ef17f57967fe290085d302. 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/DEKF21901123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4e29b64d1aa491b627c76b463c1ad632ce4d8005522c8126a91033cb37cb85. 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/DEKF22100236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920ccbad0448bb68bbebf8215a2b6fb2755584d003dfaf0fb0f71cde64e84761. 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/DEKF22001699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283099ccc246c0be94d28aa9def123d8d49c0e36e2d26ceaa32937dd2ec9d01a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEKF22100237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc264b13884dc74c49c3fa3b24883583f24d314f2eff156c065e6834c30d36a57. 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/DEKF22100239.