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 0xc455c3467e29ff6afa056644f3c7ecd1003c2bfec6c66af0bec29b2c6b7e5fc3. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fc5f887-6205-45b2-8c04-109f2d46c244.json and https://artists.proofprofile.net/proofs/artist/4fc5f887-6205-45b2-8c04-109f2d46c244.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 0x9b1677eac2939a595819415953bd0577d0f96ee8a7474e2b0caed59c9cb40bd3. 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/USA2B2512940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b061ce85d67986200dfd00d11ad6905f4d02b0c9f43bfa06bb21af1114c4ec5. 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/USA2B2512941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9b973dc7f8351040de95bd215df1e16cb0879b2329b5b7fc107e7f97def618. 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/USA2B2512942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe114c6135c20ece3b6ff2143c3d37b523b0531e555e79cd5bc218f645fe22337. 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/USA2B2512943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d343b12f7e2b46fb8ae4961d2299e16044b2c8387c8fcefb695caad2cf5d0a8. 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/USA2B2512944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b38a1711785379bbdf7ea8333091ffdf40ab2bb182af27f88e10ea8ab60214a. 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/USA2B2512945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e01aaf6b1b550ff9c8469fc749774387f2c1289cb02684960410ea8035e2831. 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/USA2B2512946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bae81ab05de7e125331ff53924871889e1f4f7d63898502a154d969f25a7fb. 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/USA2B2512947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5fbd33dfe3fc1805bacae309405c6d65649212022bb6716b798dfa3df6b686. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USA2B2512948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf0d8b79e1464e0314d7f014e3f28fbc01b8af15453fa7845aba68ef715021c. 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/USA2B2512949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf802a11e342cd3bdea0bd255a61a62ba6a0f3d695615013d16b642b8937b41ce. 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/USA2B2512950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a18c4fb20c949c938a516b9aae26c0476a9584bb13fd0e3d62fae783def5574. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE4WK2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a65a0c4f6fd4c990cf2e8530be5f142211cebdcb3d43f30dded6dda645c87a. 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/SE4WK2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7416034eef79c3cd97d28d60b75afeded13ea7fb040424ff2f91db4f47e85d1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SE4WK2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb88474861eed3fad29dab9d45bc95dfde32db11411a856af65c19e45c97fb11. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/SE4WK2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dcceed1bed44decdb824fc12a51f5b339843430233144916515258ae85c6d2. 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/SE4WK2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97325c456dc891581a4493f038f0d2610736457140000cd271d4242c2e750c3f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/SE4WK2200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca7f14a54f938a1a6b2259896dadf17edf019f21ce19370883157ac38194144. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE4WK2200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483921bafed80ac39d650f3ae09e62d223bd78ac41c753a855198fee16cc16c4. 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/SE4WK2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0552664abb34ab2a59b9391598a0674c3d2ee0a572f1026023d94514147cd41. 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/SE4WK2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9457418641f5104a4a2331d7a7c0eea00ca05884421f380fbb5bbc61c584cf67. 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/SE4WK2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3e91f4e7cb3752cc3c4b9eaf4e6a1f790d30ba15df07bf26296c7c53269636. 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/SE4WK1900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9af2bde7f0780a383808d26f7dbec626ae6a039121d6038d27ae7c3d6dae06. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SE4WK1900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9457520c83cb6ca0a6e6d029101410791f3a6b2199bf6cee76057f7ea622cfd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE4WK1900207.