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 0x6de5515de5b2a2af001ba61d3acdccc2863be404bd488a3f6064178933159ee4. 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/1a40e34c-e711-4822-8235-beb82dfb6603.json and https://artists.proofprofile.net/proofs/artist/1a40e34c-e711-4822-8235-beb82dfb6603.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 0x8baf8aee144e3a8dec74c7d625a1903020c3cb81e51fd3b6ffee20fc57fa581a. 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/QZK6K2183744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f09c77dbfd064c288b8274d5102a48429b9c39dbcd9b29d61cb19d87582986. 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/QZPLS2499195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa97465d1e09052e44936f80142f65ed7b94d943ebd620d78be00cb7ce4aad5. 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/QZNWV2439787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4749950c54e59c97bdab6c59635fefa386ad7f851a9895b09f882a4bd51f063b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNC2418250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9787c93e1a16228241080b8dd8c1b4a7966ced6959210e077a13ef8725a83265. 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/QZTBB2375327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c112a99cb72ef6d953c76ea26d3a25077695c25bf1f725bd2b5a3111a9f3db0. 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/TRA162300478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3cec1e21ad7b08fcbc2084421aac2297e5c6ef3850e755fe23954a9bebeba3. 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/QM4TX2247456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72da8c41e84bfd58628bcf5a01fad421e73711a2d5058e0c4092b98e4d835bd2. 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/QZNWV2102955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a942321b839687b68f36873a68bc0b010a1298a2a4414b000603fb4dfa663a. 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/QZK6J2161367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08736f0c3f51468284bd663c86e5bd1182dcd73dc23e16f08729eb97e53add09. 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/QZJG52111892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810d5060a22a17d2dd6ea04b8d9fc2dac75e1a05979951d49b44fd8e110362ee. 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/QZES62132119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cf948e323b18a9e031419680bc9089ec06969a3b418299fd143de4eb0de04a. 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/QZNN22192023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02c5e9c8fba491a110839b8338165f910b5075cd222e1637ccf4adc6cb58f49. 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/QZNN22035748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dd03537cc04179298ba072a9e6d58feaeb2f572fc556272366d205f432f19b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNMU2048094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf2c4e23132a06191f61c83f08324cea88281a57ac2c4cbfe32721be61457a0. 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/QZMWW2088605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97ae9f88e45baf344647b0b4425d1ab5162938fb793b9f357f0a77516ad892a. 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/QZMWW2007998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97320d6e58a602952bf1f6e928b745a031b7d6681f719d4e71024c9827af5214. 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/QZ85M2026484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf400fdeb34d877e86b357fc3fb7394ff1ab87f0ded7d1becbffdac04b867e032. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZJG52074389.