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 0xbcb83c199de8087971709cb3e584f393842f320d2fa75c9b3a34c4bd61a4d537. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f579c3e7-2160-48cb-822b-15b826caf6b3.json and https://artists.proofprofile.net/proofs/artist/f579c3e7-2160-48cb-822b-15b826caf6b3.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 0xb62a8b48672b3fa4bc6eea68056ae034a9b63ab322593f866fc98593096625d4. 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/QM7282071207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3d390b318fe65722b19f3864a0eebf82c0e58ed684b8ee358dff93eb6353d6. 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/QM7282071208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923547b21e3c7f90d58f62dfa9506f6059a03092cf14006edb43f78edd207f27. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM7282071209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488462c84c220a88f7c7f36619259ceefbb4ffdd4ce4bf4dc3d79d96fefdda5d. 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/QM7282071210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b1df1bd9e3fcd2ec52b6eda4ddf6af03f4cf0dc603cfc33e2ac51d8cf815bf. 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/QM7282071211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1390a0b72aaa316c0a6db548e9450d003420b0614a40b84eddde06970fcef6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM7282071212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd687d79586396a0c8d36ac8acac90457ac0204c259e8d7551548ae1c9e57f337. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM7282071213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d73b7afda05d41136ce1bcb15f8ef677a872ffc51071f4714f4a2b6822d9120. 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/QM7282071214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667d7597ad367599fc90795d99878fc2b64847f2f23f58d865f13a98567c15f7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM7282071215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa305d292db1924e39851ec12174c2e2b69b8dc8802801cffd3f631811578b8a2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM7282071216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bb69d8f03689cdc1d0464b82d259652eab1f8192ecab2f080c7f4925482afc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM7282071218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dece9343579548ecb8f2f9c93886d2147232a0bd4f8fa11918453eed2965b6c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM7282071219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a99ff6fdca755cf88586f36293be497347832ac923228b8a60c7ef8ecdc85ab. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM7282071220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc192c290987bb1516632efb29a54ff8a088fa7be3832f7132c75c90a4b062a4f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM7282071221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b17a287e15feb6d082e4f84af6f0bf0a3b036787f0b3efcf9185d128df171aa. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM7282071222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b6aa736ff0d3214deacf5d4f4e0f806c90b9085fe03714fb91198ff473b26b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM7282071223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee10ba888f4f7cefa94bc0ae2c56bef5aed5d84f094d6489c46b9a6f1b0a148. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM7282071224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f64a9893ebbf705a7e03c4445b0e39381b473bc895dcdd346e6a6adabda6b84. 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/QM7282071225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82605dba4098c2af4457320b54093b493de6946d2e7bd831fa5693f019f9fd47. 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/QM7282071226.