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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6690cea8cde0cdac3a9d8ad136a23d5ea33252b1be904395dcdc8fcf0cc55ffc. 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/5589b685-7b7f-49d1-9eae-dfc7f4c6e07c.json and https://artists.proofprofile.net/proofs/artist/5589b685-7b7f-49d1-9eae-dfc7f4c6e07c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c19a4b529d1d368e0580c47e57f4686fcc16df33f88bd700ce580c175cd7e80. 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/QZHNA2351502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a662f96ad892058638511fac124deb4aaaf69c8b1dc06274a95b9fe8ed20d46. 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/QZHNA2351505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962c770cd23447286567e23c133616eca8169faaf0adf4e1a10ddbe17c77358d. 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/QZHNA2351506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad811a18db372ea24fe33b88009df7fa9ea2c5ea2053ce73d9d76c3416160da3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNA2351510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc00e718ba325f61ecd66b4aeead09a107bbc2b5a2ee9f6d41907cbdcd16c0b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2351518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd3884b179e1e90b8fa8bbccbb82022ca4193a51026fca9d831aea6ce4fc1fe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2351519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdfe869dd2bb8dbb8fa5a65b2700aa48a26a42b92cada0b2e494d4414ff01de. 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/QZHNA2351503.
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 0x520f03f30efe4b2840d8d5198989db54e0acd0e03cfcb83f9143da0c2aa64948. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHNA2351504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb272b46ad4447280375c6d82249ad1883fb87d7dcd8294d029fa7ed129eae0. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZHNA2351507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fccf23a44fa43685122c3e3a49e928949a66bb140cb8feca663489550d4056. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHNA2351508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5d7154cdb2a062dd8cd3b00a0a90b34967ac7c34d302e9c7f90948f41e93d6. 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/QZHNA2351511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dd9cea54e8a44c1adba361b365a669237b1eafc2870bae602b4a28c122de84. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZHNA2351512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f71c2c5b9980651db1131299b936e20dcc3d3b3a4e45565935707bd5b2a1ac8. 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/QZHNA2351513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e4d389db6e269540621a41bc2c2a0c7f925ccebc610979d4f917921d490af8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHNA2351514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197de934910629204f27cff91dab72067109380df9687a9db291043d3f739ea8. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZHNA2351515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dd9462ff6c140961ace6cae6bc60115d4c4fd4b9efe3f426e19f63e58567e3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZHNA2351516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf43ac1ddd3ef706a95e355f028544f2eba70fd862bdd79f5ef69e0aa06af468. 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/QZHNA2351517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e967c5b65711c1fe170db19887e542063af2e86e6a4e6640a5b5697991d867. 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/QZHNA2351520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17f0fe8c1c1d4cd4e79e54d7fa4ca05f718d3acd810096fd5fbaab33b263472. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6541812546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdd48ac7b42f0751eac681d9c1bf8d0d55538ae4ca33ab682c6fd1950b9473f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6541812547.