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 0xc512d88c351a777922b21e8428099d531afc3176bb052a430cd5dcbd907a2f8c. 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/72e25fca-76f8-43bc-8d85-955088debff0.json and https://artists.proofprofile.net/proofs/artist/72e25fca-76f8-43bc-8d85-955088debff0.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 0x34a39e1fbde7ec05298e1a1c813e72c453fd64be81f2172d97289e83273cfa8e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZGSW1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b9f79664e709656f89a07d4335f69d1172f7857086b626b637dcb57fc0f932. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZGSW1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d96332910e954214720e6ee2b0a992a322a111e52678b07cf022c8e7cb9f92. 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/QZGSW1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7495917ac68f1f2f1063b01f8a6139dc29298c8f3040f0141d1f3ab610237b59. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZGSW1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce035dbe134df8510da30003c1f90c85a0f13c21ca172f6276f33096541ded44. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZGSW1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44cfbf84f1b2fc89c6dd78e6874182663510abecaccc9f0971ef58f1430da62. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZGSW1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7acf4436fe3771a14215c9b3cccf73ebaf68507cb1db2dbd806dfdd0694e8c. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZGSW1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3874d3f2e348074cdf1e5e612569bfce2979cdaa63fe6f3d4fdb590db6a73c1. 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/QZGSW1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bdaa0312e9e538a41b59ad23fe7a8ee7ece10982d4853fee795cc04a94e650. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZGSW1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02edad98b7971fdbaa6c7eb7aeff9c4c5f99cee4ac069dab0f4bc89a0797cb59. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZGSW1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732cb915324eddb901b9e656822e4d7178501ab35cb9f5880b2d5f4c017fc55c. 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/QZGSW1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f60a67633b9dc9f29eef7c9cae0dfa81e40df43eb8dcc1987ca960ccace0823. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZGSW1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8f0a572b10755a57a51d4f3c13a61acd912916200498fae4563b1edbaaaded. 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/QZGSW1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb02580ba3f989ec9a4c93a1b6e0543298cdcfc84476e9e9354351c85b3f57b. 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/QZGSW1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af91bf0d00e38fd0e33dff06a46f05166e2a50e56eacdb5267d6af7021bc509. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZGSW1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb717455eb0d25b5448463c235fb4b0b8c7516f9d46f9aee493427eda895811d6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZGSW1900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6184626229b96ab6ba902325b4678e7b8167648a3c8bb65b07527ebe378fe239. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZGSW1900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a0aa4100af179047fc494439d1bd1ba074c0e3ab54f0fa8a6029f725550f08. 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/QZGSW1900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056aff41a719dffd6a76092ec280374bbc1ec764313248ee1cead657d52cbf17. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/QZGSW1900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405008c2a9b88442e94ab225ba998f4bcf9aabf947a2d5d3330c56d8b2738943. 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/QZGSW1900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790ac8e20ba505b1bce23816d02fd404af81aad830030216b8a559948b3ec32a. 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/QZGSW1900050.