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 0x19550b324ef11365b9ed546ff1f3acbdcbf7239fc980a80fb556eba793e7746c. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59af31a1-7e17-4a15-b3a5-e599487d24be.json and https://artists.proofprofile.net/proofs/artist/59af31a1-7e17-4a15-b3a5-e599487d24be.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 0xba0a4ee06b4841d6d7942191c29b92e38bd9b9705930c23122bf13ffad11edb5. 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/SEYOK1412308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5766c299d00ce5843328233d064d558da6f5f81de5dc84c85b5a054db60b5b6. 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/SEYOK1412309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d32f847d90ab014c66dfa0b46bb29b328a63d0e30d502bdaf720404d47cf42. 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/SEYOK1412310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434e76f0227edb43e68be2206bac189cd827f052b63db1d83cc005b2303af29a. 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/SEYOK1412311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af31c9083ec8c28418464b9a6d62c4b972a6935a0cc12dd4c48ba0edae97b52. 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/SEYOK1412312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd30d3817d473f84585b606e1b01421c72691e662af3015240085117dc47add. 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/SEYOK1412313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99945705ce6c65658f2f72c58bd3b89effa1835ad93ab910baff06d080947b03. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SEYOK1412314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a558e3d734f684cff0f3d9a9c67dd8241f1ddc5520ad2152bc3b6507d3000e6. 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/SEYOK1412315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19a5abe2d7c7c273430687a639b424827f654d3b337636e246c693001493a9c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SEYOK1412316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2ecd08c34b140c9f23e00ee9ba4e8fff5ac279a701e76a8d3ff46caf939ae9. 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/SEYOK1412317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf991433885aa3d186ab3689288d86ea416c7fcbb768251f3b47514da496a52ba. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/SEYOK1412318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618a3fb75ff23fd480e35b30ae0b7ea8d5d0db73475464b626394b87b189e288. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NO21A1401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4624d906eddfb5c66f1f60a2beae9e593eefe06af94a2df185dcb840daf3b6b5. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/NOHLX1420021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a18104fe685a23b46e570d887503a3b1ddca4a5981602d9ed9016b68410f220. 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/NOHLX1314160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47eefc5fab62b504f65844bd226ebee570a1718a9ce1b68d9a47c3718d381b2. 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/SEYOK1500384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d64eb93ac05c04927608c0db83268dd731de18957b043eff676be9cc4aca73. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEYOK1319553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05fdeaea4fce2ff8121c445256b85dd92ee96782e302b30a64a36f3eec1408a. 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/NOI761307020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2ec044bda606fef4f6a1fbace850e806a21e30d91e2885741c5c5abb9a95cd. 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/NOI761307060.