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 0x9fd37927e318575befc7392cfcf83fb55cbdb07932aac69a462ebfe581ae95a5. 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/1d73b26c-823d-4038-906a-9085803c2804.json and https://artists.proofprofile.net/proofs/artist/1d73b26c-823d-4038-906a-9085803c2804.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 0x07e710e6c3ffe486f03c5efacc8580334223ccd98a4ac6ae933dc9bddf2bfa49. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZYFZ2431852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93e91e2bae6349584481407176fbf0e07a55cb7e83767ef47b6e67a94c89e3b. 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/BCI5M2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69558368cd8785196d025184bc48807062b13208a77a316900e793836d4108bd. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BCI5M2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19aff73a20e6037ab4050254b1d9bdc9664e5c01d0b2e977a66de8be980fa72. 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/BCI5M2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9020733e8b845b70c65492fe485add743e6b15b70acd64622a9c71c0838b73e1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BCI5M2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361a84bfcde9268102fbbd8ace2e44955503ca73535681c9a9396833aaa9458c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BCI5M2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8394a51d8993d3653ba9bf4866bfb0feff614e487b9b41ad966f0499966eaea0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BCI5M2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ba923d1c21a35211e4ce9f277c9920fa28e961b87e08061d6158f61a51b15f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BCI5M2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3121b4fc643c1cf032e166b7fa85bf7d8c59662d8e41876f33eb846a1641955. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BCI5M2400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8a1068f6e9460eb355a26e650effec0d453bc8bd4a3dd91e0054128c607720. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/BCI5M2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d1d42a8f61ce44d4652abaebf32ada72aee93424119404b3369bc98e20cace. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BCI5M2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adc6b46a8a1f85c673192ca588209b7c17803829f4d23147d827b93a818d361. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/BCI5M2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8119c9758e7bef44e64b71b3fb40a685bdd54babbe165f5e15cf6ed01f7782d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/BCI5M2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632c7300477ef4a05c219f9637f3d798f7d2260d77526d2f907b388dee7405db. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/BCI5M2400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b90970963ba4b5c86049dc89d3c1552c7a27f5278ad71f8e17971a1e4b439c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BCI5M2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a790edbb79a04a98c8ed46dfbe4c575bfd5faf9106a04baef583f5c5f072531. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BCI5M2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efe09d7014e7768889071e94b69760ac837d4b07a00f68daf4a5e9b2de65097. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BCI5M2400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3e2c51dabfd8db2a4ff2d3e954f77b9fcba05d98a56cbb3d78e83bd5bab563. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BCI5M2400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a6bb41cb5ec28df24bb0da39f3a35e9fde157fd23e8bf1870f01f8d281db5e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/BCI5M2400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5915ee20ec037d801828c41c8fad0f3882b8069bf954f9dfa4cd232477a21e1. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/BCI5M2400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cebc8dbb1cca56967e64896bf44a449ec45d785ce80af31b69599697591acab. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/BCI5M2400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3d8511deed1bb7ec76843cba405083837ffb0ebdbb1c0da96ec046621c15d1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BCI5M2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47f10d579db055eb94092048a2c69492df250b71935dcb1b166c301ebb2d120. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BCI5M2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775dc11170eea1233c32ecf5708cdfc1fb5bace379ae0d1531bf871f7bf38c45. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/BCI5M2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb9bdf5eb19225bac44548ec8e9526304fe574d24b77bef1b2e8e96a2e9fb7e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:06:58Z), 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/BCI5M2500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d722a64e8f067d5e51be53a0b5abc0c3012bd4291dc9eb971f70c3554881f1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BCI5M2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833a4546c564f2b0936a8487f4eff5147d6f63f32d58ced0de79d1b0cd62513c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/BCI5M2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe28cc559f14bd7bfe4055fa6b0794d33ead5b45bb2db9351ca143c4bfa0827b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BCI5M2500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996b87a82f081eb5c39b102e857cc684b164cef7cad2a9a02351ca4f92707609. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BCI5M2500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88d9b6f51b38d086e2c038fe75649e916c8ed44a6ce2de6c2f7cabc913dd8d5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BCI5M2500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b09984205bd29460eae6d46a25ed3f03a46d02fda98faf8155925229a3e44f. 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/BXY7G2300006.