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 0x43528156a3984eb39a9929ba37a710ea5261d17a99c85324334532aa8fd8653e. 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/24197ee8-7991-4b1e-ae47-1beedcbbba2e.json and https://artists.proofprofile.net/proofs/artist/24197ee8-7991-4b1e-ae47-1beedcbbba2e.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 0xee81ea28021fd6d4b2b8ef9db65458b90e9908550892276bf1f7e589fef80f33. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAEW2011654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294b6f2737ca7529604dba3fbbd40219bfd36fb4cc2676e594cd34cec02d78af. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCAEY2055721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54ded921bc0148fd4906e8af98f6553c8f70647a39922e5790fb4d785f38095. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:02:05Z), 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/TCAFB2082067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07510c9f599084516074077b32b5a37e67fc952bde0d550edcfb4ec95fda24a. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:00Z), 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/NL4YD2100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac5a3f7c3ba58d3b1a442b5988d1fa2591d6229e2308dbf276622f53ed16af7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US3DF2220008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b3161d54643038b14f076ce7cb72c8fee4a11171eea7cd50067081f26ac592. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/US3DF2254037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188901de4c4299d5741e6c604b3c1f3cdb1004ff7925ff664f6875b53bf30196. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FXQ892200276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc832526674da37e7f48e3521b12abb1056a2abcfe6d0af6009114c031fa96c3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USANG2203276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37a26adb88eabce609f4ab75a61a263c3d297cb5e2fe0b314354598e094984d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:33:05Z), 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/BCD4N2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01842d7e6b426879ccf8085c7cd5e5353110160a2edbb359fa954b9787a33da0. 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/BCD4N2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf218b919a40fb73477f21090aad5b5c38a0f1c290fd996f457008b2f36f1efb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMANG2217567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a251b59c3add721cbdc013238cff845b50437750d5cf7011a66221cb7e743. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZN882185139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdea95b21d276960265820252fac1690b100824a30f48774243e13fc6ab3fc67. 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/QZN882231963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0beb7c0c092f8fcf38bcdc412f290cfc5b8bcc9972b7ff2aa0c9694ad693d79e. 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/QM3DF2277860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f819d158d7c5002701c82ad632a628dea3b9a95bde488d5059f1c622709f50. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US3DF2064228.
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