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 0xd9e53b556ff5c2f623f4d8dbc4302b74a7361b1de2a7c56dee0758ba2ca057e5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ed6048c-752a-4132-8850-91bafca7a4d2.json and https://artists.proofprofile.net/proofs/artist/6ed6048c-752a-4132-8850-91bafca7a4d2.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 0x92dafc6e7524daa59e43a1b25df1884d6389288f3ed8583efd7d1c5135014211. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZHN82371062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51ad91df3b10ccf6ce4404723bdd2e51f5dca95b97944d2199f8722b03e7103. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWZ2428520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d00371a356da672cb8a7715f7e6d3110bbabb75f05419b6b78cc1e5b51f0cb. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRR642400779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d61b8f4a253b6b083861119084f8a9d205aacfa5560dc8754116d60c691319. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZTB42390861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d2bae35f8a77be85cd408eb4538abcf317ca201c92cf98a686470ad48303c7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTB42390864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2690979d152f9b97ae927de7ead68b3bc02fa512e8862e4710ded7866bced95. 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/QZTB42390866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e77114568fa310c39910d1a924ae90769501a40be5f1b6e01c6b1f12ef9abf3. 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/QZZ7Q2531889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa3c875ba52e21aeeed5143ab7625925b9e9273876d7b70892801a4a303b003. 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/QZZ7Q2531890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7288813517e68eba056913b09386a3e5d2e4ec9172947a3a72aeca5f5c7f5193. 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/QZZ7Q2531891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf5e4aefe74baced734b28328f0ea290d3194395bf67887e9f51703df2682ee. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZWFP2554077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8cfd878a5eac6ab02320762c84f498e12fe313fd737959cae36499f4bf749d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZMER2532527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe574051170ee4561667095908df6cf58b89522b4dd005b29197f0069b8aff29. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMER2532528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb946e2b5507b1b4a8cbe48eefe5b26496ea431124f1c6c6ad38d734f1b07ab3. 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/QZMER2532529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e062e19102f5317b957aaf508f0e52269740918679f3c829b080421374af74. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMER2532530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6337445de9ab35a905357fe0a32c5ea5f576460c465ff5ca498b4a7dab98005e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZFZ72569146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7207ced809d10f7aabfb730f18995e680776cfadbe72eefbfa909e743b63639e. 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/FRR642401103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d00371a356da672cb8a7715f7e6d3110bbabb75f05419b6b78cc1e5b51f0cb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FRR642400779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09648ce9e139aa57dcdaf37b2cb1993aa253bbdde9df2e5a3f2a4c47fc97759f. 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/QZHNC2477812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15ae23a7e02dc6a6e402c397bea3542a093b62cb34ca981e73df00acb0f1ef4. 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/FRR642301669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e00376677166055fb28c278797dfa6f52b2b39075c9d46d997a260e404df61. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZZ7L2497638.