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 0x761fa2f2c59621149a133719b58e5c77f0b92d614454c8f422abdaf7f0184cef. 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/cf784cb7-56ff-43cf-b9c2-b4d0d7eddd25.json and https://artists.proofprofile.net/proofs/artist/cf784cb7-56ff-43cf-b9c2-b4d0d7eddd25.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 0x17e21b333d54b3f4f1f4963c91413f4975fb26d80cfeecb23d62cc8990e17211. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:59:36Z), 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/CHC491800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b9e2a88378a69a3e4321b5f0073148692fdb4df80555ece92b0c29fcf35e6f. 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/CHC491800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c82f9205a8615e3ec87ad990ced7fc585bb650cd33480fe77907e4f12cd4a8e. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/CHC491800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc834b109dc54013470cf34b6c800b9f453d6725f103f9c990fc6dc687415bf1. 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/CHC491800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f310f0f5d7fe100306d11d860e896a67976c4d33d2d9b7d28a7111c92725f15. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CHC491800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0376e25ba48e2c521142174c7c780acdf6bd438dcab02832da1ff9762dfde7b1. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:01:34Z), 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/CHC491800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b35da72193c3689fa6798613348cb5c6c95786f36e027f0defaf859461a539. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/CHC491800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f5bb472ab7f443edbd882f5ea5f36aa0389778572878cdd595f8337d3c3ff7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CHC491800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff3039d7a7c9f0e988163d5d5a73a39e7d40bb006c43978bea2e73df4daeb2b. 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/CHC492000371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc049eaba64ee7ac8bac6c670d9307cb9dbd6f99ba9f86e9e47a5a92f6d65e6fe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CHC492000372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60b0176665d491f490cab784f0e7ddd774548b26446b6819d2ec5efd3e4a04d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CHC492000373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda4921cd05310e817bc52ec596decb1eb75b7ea6c80823b589474f6c329b3a0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CHC492000374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6514ecf8f01f50c5342178b414aeb324b9106daa52fcc9415c6231d4df2dd5. 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/CHC492000376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cccf48a68a8842084d2f57eeadc3ba2a06138ab17ca40ff31fd7a7ad4d7dd2. 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/CHC492000378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9110b0d422a9564ab27c1969403bd16719f3e04d3194fbd1983aca9190c2c366. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CHC492000381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63137de9f4e645e72c84899d5c36977306985e4c6ecb5f7cf7e1d546ddba671. 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/CHC492000382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c4776bcc65b57d2dd502bcf313453909954515ad3572e031ee918bb8ab9b26. 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/CHC492000383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4379b891c91b1ac2e8cc6c7a1260a3bc9ead3dcaff763fe1ce3656dbd2112b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:42:41Z), 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/CHC492000384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ef48947130805ee52950488667c92eca3482614a44fb7ee2a5d0dde53f6306. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CHC492000375.
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 0xac43816bb0ce34df62fa19772e9f0e8da40e354c6decd9941aaf3eccc370b0d2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CHC492000380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4246aabce5570b8da1c4a23c8b159ec22602115501632af82bae28eba19cb16. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:36:24Z), 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/CHC492000379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f827d3e2b885c9712ab280390ea60bc89bc4bd7dce8206d38329a7e0f150f2b. 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/CHC492300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35309bd47d9f26273dd141a3d003e316fb4081ef520224e6016493ef7c3b5d0. 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/CHC492300481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db694319aecf6a11ca3e2a1303c539ab523a2435b576212eac883c5a50d164c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CHC492300482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb437bf60a227f7a02e463282b66948c860bb3a0b98ebf96f5b2d4d37a8af8196. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CHC492300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc6f05e530c02878c23f3f2362afaa4f96324562bc4fc5cc213baeca2410c17. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CHC492300484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c654d3b288c5377ef68b3b6757ba2cdb93805acceb0dc513b60c626cfae1f46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CHC492300485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6cdbf5fc0e3407c26480819cccb9d1471f4b3760bbad6bb377665c4c70be1c. 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/CHC492300486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8c7fd9202c57b4603decff4207ef044d0e76ddcae1e88aedfe27bec88c101d. 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/CHC492300487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730d7eeb6d4ffb3b45e2d3b2b3ae22cee19f61ca039ad5de7cddc8fde8d095fd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CHC492300488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31adbc147d5aa31e0049cf053585e278a39978bb4cd3282522fca14e83bf1e5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CHC492300489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259f152053392c9b6ccb9420fbddf90602ed0ab3557751cb15cc36d61ec7552e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CHC492300491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c03fa691dc7de658a6caf9d1793ad1b9aac08cc076b1beffee5d4d18226a730. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CHC492300490.