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 0xb66af9a3a5c4025bc9d70d7194ad4c47a4a8820ad7cb7af114f536fd37cc9322. 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/5c09b7ad-9922-4e48-a462-c7724626fd36.json and https://artists.proofprofile.net/proofs/artist/5c09b7ad-9922-4e48-a462-c7724626fd36.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 0xe34745f1b30da63388807939892d6fc061d900e9ef9a7459edb4eb88a3db4562. 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/CAN112400737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72fb7c3ab9535ec92fd51069233f3b51daf5d04f5c6db53a3c6b047256ff403. 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/SE6HN2201965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d2f69fe03b335cb6fd4dd8948917379c84df92684ada0226ee2a816ca277b0. 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/SE6HN2201966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15161a3889ac0440b36b39258c81cdb56950ff02a94e872761cbf644c44bc30. 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/SE6HN2201967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb9e36815ac4cdaa2482708a50e2969e6a08750e4c8f970680f345a2c1e0a6e. 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/SE6HN2201968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8422fdb4d361ccdfaa766879d5108b938999b4df9dc7625ae38e86c930683ab7. 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/SE6HN2201969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2435c151389845c9e667092e6c3af155f9b5667c9dca0c17209886dde4831df. 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/SE6HN2201970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6295c586b037aabe7c201888cc523611792eb4a075cc622032232ec25d62c2. 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/SE6HN2201971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9005c99b5fbb7a984914bc88a5595bee14d8b93bad7bcd147fbe9d9261d31166. 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/SE6HN2201972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbef1a5f119ce2f30e3a15c1c7d8f0d775581a9b8b5c84935bee1322ba5a317. 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/SE6HN2201973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ff2253f54da06d93f2f63625ecc3b66a0399eee065da64c043269ff2bd9fc1. 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/CAN112401255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b57cfc3c0843a921aab770b113e5c2666b691bdc481978ed803caf912bfc0d. 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/CAN112401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b57cfc3c0843a921aab770b113e5c2666b691bdc481978ed803caf912bfc0d. 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/CAN112401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff7e902601a4da8e0c50f5465c1e9d151ded6c21fae3406374627e20b484f5c. 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/CAN112400332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234b986253f88d83a9018b5038a38f34dae1203b3aaedfbb40bce7f832daec6e. 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/SE6HN2394251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5276e0d4ed9568d498040f24b034b7c7ed53c9384dc05e5ad08106faeef62e. 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/SE6XX2131967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a6cd799b22b02c06b13c4a8ad47490d8d90b366317560960a531920466137d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAN112501163.