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 0x2fccd6af99a307888a42d3c4be6e7084c6c7159e5578ccf0c70e424562d13f87. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9c126f0-f098-483e-a029-3b12534ef3ad.json and https://artists.proofprofile.net/proofs/artist/a9c126f0-f098-483e-a029-3b12534ef3ad.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 0x08f349b02ab2b915b4c84b6f630e1919ca8338aa8f69b350b1f4e4cfb903b1bf. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:06:00Z), 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/DEB331965905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24406cd072a606b8b4f528af8b8f03283f1892914ced3f496724fed6821042aa. 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/DEB331864504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9b71df5d3f68df2c4f8e08f8d262509ad407ad3c5ca28e14ed53e25ddf688a. 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/DEB331864505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410e9ec02faa1f77006dc2dca206e2978542554fc07cd3e69590def9cb06707f. 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/DEB331864508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24406cd072a606b8b4f528af8b8f03283f1892914ced3f496724fed6821042aa. 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/DEB331864504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9c715c54b3fd28639329bc211ac5b5f5cecb9bd8071a8b2730618f8a8a8d37. 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/FRPZ92005820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc7754b87e17e6f67e08972969cc815d425a20b25f2769888788eb63f929e9d. 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/FRPZ92005830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e0d4e1c09267f08d6d07c9770cd7710f58f0c06ae7e583e4b588786d95b5e6. 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/FRPZ92005840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03cca64ac6341c7e62b2f361c4913ef0bb65679900605513986d02492b67381. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRPZ92005850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6252b3d7cf7868e53b77f5665592866817a4c867edd0b7ea121fdf954eb431a3. 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/FRPZ92005860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5605c15030843ddb085f99c4a9f9a2458bd194ccec059617161e7847fe11fa9c. 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/FRPZ92005870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf528e23375452faafac581eb7c2b6fb9828d6e95a68c65b263829f4be32e44f7. 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/FRPZ92005880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf3010e3417ae9316db9cd546490e4c44986d884308d7f7057c26582031817c. 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/FRPZ92005910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc975ab00b4871a7937a9118c83bb3527f730c79e254f29f79b9fbdf656688f7b. 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/FRPZ92005900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7762d9c5d73c1d216882ff2df164fce9350cb8cac4ce6b6ee1be3c14b8053eb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:38Z), 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/FRPZ92005890.
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 0xfe990a526bf4792f15c28422a98dcc43618b6a6aa6421277a3c718a77c95769d. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEB331864501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342585a2ad3938111bbe6b1d8f57cc65fc1529997c063111eb13ffdd7e1fde65. 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/DEB331864502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bce5baf5b72130d072b9dca5278de815ca61f00fc2bf605483cf61ae7fce98. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DEB331864503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd983aa69e98466da9a86d25a8a10236ffee57deb279bb6a3820f17367a4654. 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/DEB331864506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd61ff2acd1ef6789594734b463273ca3422df5e9ac4feddee5322da125269b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEB331864507.