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 0xb05908cbacd724c3826b5621bda4eecb4b6748113a6f7b54d915b16fdb07af9b. 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/9d10baca-18bd-49ba-b065-eef4f937b815.json and https://artists.proofprofile.net/proofs/artist/9d10baca-18bd-49ba-b065-eef4f937b815.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 0x10cf1e0a810872518194c2517a8c85088d9df8844625ab5a4d1b45a6434ec7c0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNC2221272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87189bf6c662472bb2e5136ef83e7adb668d23575db46e675ecfb91017ddd6c9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC2221273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5014ee97c6255cc940b7831f3c9d6cf95fb8cb37a430dff4e64b93d0139f7e. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZHNC2221275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068307c6bf2afd046a021cc23c323d7627e8efb1b6a8ec660d61d95d6f2e9f13. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZHNC2221277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf47a174a5d8adc276521eef7e11c66e2741dbb1c6fa9edeb6f1d0d579db0c9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZDA72344197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177da04e6012a10e0af97126ca294fd9e8afa8e1f0c1c3ac8fb7b96784c716b8. 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/QZES72319308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97535504e86f6c391d3f58dde4896e5bbc3d579a8f43edaf0e91a561fe8d27e6. 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/QZK6L2304643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc65d2e69d8176b1f9cc097d2683b9d713943e84d92bc41570d6e8e937d84d6c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6L2304644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b46bcdb346705f01e5647b790d6045e3344e88259ef8c0db36ad49295ee531. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZFZ42428757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715dec72c2d722b9274064855f345444b2c218f47c5d09b2ef54331a9a949812. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM7282464412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e25e09a51b1a24d240441f9d229752d71798b9afe06aa1511d7edb6b31661be. 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/QMDA62441786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4be1665648c760838123daedcabd538322f6a73d92a8d73c31e7229f2b0581. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAT2330494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92791a80621b441c03b6e8e3dfadbb91e9c5b599d690598aae75e2c5f96eba4f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMDA62441792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa421267c566f095e58c43890d35ed9e8e54d0333bae2f5becccc55deba4d045c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA62441795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927f9ce49d933d2817e06d60f8ecc112ec94d317a0230b71debf16dc79ad743d. 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/QM7282576389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e0c537b8b0fef00588527e615eafa1e7dca2e3983fa35802b7c4a24f2d80d9. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QMFME2511535.