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 0x67c5c7ed27b6b13916e820b9d30a784ee1d89d84de9d708e21f297917cde245f. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7677802e-92c2-48e0-aa6f-310cb3dbdc87.json and https://artists.proofprofile.net/proofs/artist/7677802e-92c2-48e0-aa6f-310cb3dbdc87.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 0xa294081af74f333f2efc883ced3926bd938333d648919f6092c473d4f5338cc4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNB82395975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac852605727e7f6eb1115b3d5d128ba358925b68e5bb7e7ba7808ca43ef5135. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNMX2305379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ae8f9393c25958e34fdafdc73e0562990fce59e14c0b8ccb47c3432c66d34e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNMU2341480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853c988a272887918f501f46c90115f0ee6b2d98ed5f39fa5a154ee1f5cb5f0c. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZMEV2424774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea356ec4bc78d47d08f4c286da247ffaa087fd0b1e1679ad5e99981879d6472. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNN32315764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49665714e115e081654093472baee8c2434d717fa86ed6e9028ffefb5f39ed9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNB82395977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2083572ff2f1136ba3f1e7aaadfe09756d138cb414a831b0162c6fa3d7b3ea. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SE5752412676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d893481508cf0e78e97291c0c6d762603f6e4acba66c004da80f51f8256cc. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZNN22305027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589ef2043b0f8e6bfeabc259834e7895befef4d89a5ca6f63e4f27cd7ed9778c. 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/QZMEV2292052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bffb4934a9107c03a7bca721028b5dd1594d1febc5454a411f58b4211f1bad. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNB82395981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85bf4805bcac931ff8665f661263d799d5682d65cb73bce0195e6604218ad7b. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZL382219727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e850d0f5f1943e42b7613360ff20a4cbc9af04b7eca9993f93fffc41a1c544e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZNB82395976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d7a31f5b763bfd3ae50dd7fcd6a318d2283a279b7a6d87b9650ea209ebf672. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMEV2424776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed10920eb6e567c3d53013b1f968389d913db5439281dc43baaafc2984a39f0. 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/QZNB82395979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f43563db538b89d1e0db014645df17d23ef2fd01976988867d302fdd348ac93. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNMT2376543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9caea75911265c56fee7ff2b305cd7e8d5910161d1fa8eb5509e55109770073. 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/QZNB82395982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6385ddebdcdc6f0afeed5053992c751b504365b6aeb5d120f29fe387f2935e8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNMW2387665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532da272db903ac734ed5b43654715218af442c5929769159f736026d11306a3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNB82395980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad1d12ea66d2f5e10cedf596de249cc606f7de18624d13102714a12fa6b39ad. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZK6G2472439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b34bb9edf25d0e02527e49f881d8ed9e812aff1be9b30be739e68e156349b4e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZMEV2424775.