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 0xac23f44d87ccc7d6793d2f395d6d833f3aeb318318660a5dbb6b9b33c5255d77. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca636913-7c96-407a-aec5-c887c629e0a7.json and https://artists.proofprofile.net/proofs/artist/ca636913-7c96-407a-aec5-c887c629e0a7.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 0xcec9c51d491428c73debcdbfdf254b33beb8aa2fb1b9d1ac3a8d95635ca5f7fb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR2X42240024.
Senkim már - Nyomorultak - Eponine 1999 Madách Színház
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dc1d565daa4e0dcf0cdc9cb9cb76797ba740316c9958251a730b2c794564e0. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/HUMAG1600276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f2edcf7c30824246e1a6c2e1714f84217d7928d3b84ceb51557e1308d2d816. 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/HUA320900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4a6ecfaf927d6fa52f5ba5a29b009ccd695e932257763bbabe26c27fabd6f5. 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/HUA320900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105f99756a7ae044ce4676f14acb441c540f4e4780c64da44304adfa3324eb93. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HUA320900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96502ef2a67c36cf9b3586d0a08319ea5ad9e0303bb9275c6e1046d30fe79f3. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/HUA320900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f4a8ac74d1ca1c635d53a1fe932dfb80cadb11df36ffb99a24cfcb8864b52. 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/HUA320900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d35dc3e3beb303023c3035cdcee1dcef7c5907ab90c1fa22fcd13338bd0500. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HUA320900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7ea9951fc1cd45bc7366d5645bf65e3222bf578a2c283bc3008a60db146428. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA320900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1390995ede00f94f14af45cdb6d5b62bcad592877b2eabfa48aa49dd062488. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA320900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2820cf4c589eed6c7b3d6c7e52826db65065be7820c6261609694eb23a266bc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA320900144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec7e0736a6a48f1de9372128d8343485092e1c26b9b166a6086465068205230. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA320900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ca7a2aa9f2ec0a6d0ed5083723a17b570d5d27ac936d6c3fb76e0be8252c64. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA320900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc8ed02ccce7c8b0ea604324f0daaf4074af1c614822d5c660cbe3cfe88f66b. 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/HUA320900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3d282e57b5c864f41826f756ed9113e3b79a95a6db64f1dcf570a9abbd24ee. 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/HUA320900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9ea59dc693b1d170f91f8570dbf1f649d4b72a7f4022d9609b561ca2e2bb25. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/HUA182449711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885451a19bcb4c9238cd464e8628dc36fb346be06cefee36c0319a1d207df45f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/HUA320800165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d92905b5609ccbe273a971b545067996033041ef5717277dce15fcbf0054fe4. 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/HUA320800166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fcc1bc7cd0646507fafdeac19bbfe5fa409e6b29b64c4a0d0a53b65eacc6f6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/HUA320800175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799ca30b143c28871cf349cccc7102bfa5f7faea624b0994cf059877ce8b9c24. 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/HUA320800167.