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 0x1bf21c2c1cf9406c5fd47f620212628c1250c4ba40278e5159d7633f56703852. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4693b49d-b51a-4a5e-b598-def84055b72c.json and https://artists.proofprofile.net/proofs/artist/4693b49d-b51a-4a5e-b598-def84055b72c.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 0x60ab0fc58f03bfbb223acf24a479a1fe45b4a0641fd6b1795c8b34352f0182b9. 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/US3DF2427426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47003a5bd0b549888204160d481dfd974ec6db843084c6b8cad62efc5166c981. 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/US3DF2427425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67564e5ecb4a06c3b0317c8184fc02827a8508eab469c6c0e4d3e67ae5c4cd. 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/US3DF2427424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d46c753088265bdcf093ab1862087b6edba669a54ca821fc47b3097012d69df. 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/US3DF2427420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc020e13f9df4b74525b85ac68fdf62dd7fe1daa4c4f7a82d141254de7d404656. 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/US3DF2427418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68428075198d9e04af9d6438f60fae90d9e53a8f25ad01429c3e6ceedd203fc4. 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/US3DF2426818.
I’m At The Ocean But Something’s Blocking My View
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e2aca7c59d66995868b941c8c36e1f99159397bd07c3c96e8d465f9735d89c. 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/US3DF2426817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61d1f1a9e7897f9406a8d23a827b19642e0f8ba8d8bfb1c8a6732c7641faa83. 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/US3DF2426811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e07bb17d120a014bc4f31ca379f8f7b178c61903a387b0ac6ebb3c71a2d528d. 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/US3DF2426808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2dd4f3c146063a756b45ba4b7cf4eb78ae98269540c45f836ddd1371a2c4ea. 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/US3DF2424750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8c3918cabaa0ef52abf1befade23e5bec739e496687f9c394c908b3db6e8ca. 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/US3DF2426806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ad5231a585577ec8820fcc65877c2011be62620326116d383e38969d598585. 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/US3DF2402936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0a7e7b51763a180086c11bc434698dba1d07f334bd6b858ef922a9aa3ef18a. 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/ATPK52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07289a3f6e87d7b6ec09ee34fc64c0171f938b013a76ef0de4444d70013583ef. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKQU2273419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e1ecd9e9a396f9a037f772a756bde0525ac4505d519ce3360e23343f8a601d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBKQU2263111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d269c4e012824956aee04a3c5c2b2e77c6c5a7f701c17c7333d3c02c71a867f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6MZ2279154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe910dd525901867c21dbb7ee8c06d721830d8cff5fa27745e342171525e1efc6. 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/QM4TX2273943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce76a8ebaab96dfe29ec8006b113443a4806109a5c626ac4842c908d31e851d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TX2273937.