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 0x06c8a48031d85d9c679c88b9498bbb7567091a606a0d2a90447a43d5e2298e4d. 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/60f9bd03-0b33-4c6b-a62d-b9a2ec7d9b6f.json and https://artists.proofprofile.net/proofs/artist/60f9bd03-0b33-4c6b-a62d-b9a2ec7d9b6f.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 0x5a5862a9ff9774531c328d3b9c3c3b316738017f799e29d29b0ba121681d7b7d. 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/QZWFH2453117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e129f9ded9b0393c1caa643f4416e6abaa5d68525f2fe57aa8c184c4599d539. 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/QZWFH2453118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16605b6cfe3038971ca2ae973cf1149b889c1af8da4ca1c2a815f77da89c947d. 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/QZWFH2453119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c2e93d73c474264cf30be07ad22e62d99c3b8093def34a44dc45b73b908f4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZWFH2453120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05af1e16c940c81a59f172a2725177b49f0b926c2ddfce99162293cdd906ce40. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZWFH2453122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2fbf95f3ca1a25a751a7dff59aedd5e82f318c37b9b852b18ec22eeedae3c8. 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/QZWFH2453123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45f70dc04861e96e786b99315b84d6d266881a9a73e101f432e8661c50664d7. 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/QZNMV2164297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726f5c655791dfdff6d69e1a9491fc23d48bbd53c88c46a472836388532f3c3a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZNMV2164298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873c8b82d3c2898589676367316533c6bf664517213d0e7eb5049f2649aeb4fd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNMU2178712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34464e8d94a77d4aa189c831c95bf219d134d29ce3c6d5abe4733fc690faf14c. 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/QZNMU2178717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ad8758b87578e26e84cf4695247051d7f65f630fe276223fdd0db85f10eb80. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNMU2178719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2644b8972d700dde7029b013f61fd0e68809f9641f5890d37320205573b02ec4. 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/QZNMV2185814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264b7a39de336c49fe4f7da35d1567acdb507e82ef384fc5bf88915db7c1916f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNMV2190380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342bc58e11312e1fe0f103b66d6c43f5852608bed9e6be1e64d119c9013ee527. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZNMV2190381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2f7d23e244cb29560cff3b0547f8c2ecd9487e67daef2ce3b40fa5a26bd1eb. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZNMV2190382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7092ad717f640755373977b57c707c7a315c6f523b148df4435575c223520c. 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/QZNMV2190385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfa5e159955d5837fd4166911816792401fd3bcc46afc45d69a783cbf572a8f. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZHNC2472219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a59c821845590a03fc2456f7f6b253c0cc167ac93980271e72ea57ff2c864b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZLL92458759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884534cb0b7fc1cce558a8717272c8046331e89696340b0944c3a62ffafedf85. 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/QZLL92417632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54a3b1807fac06056e2f8897aae9765e754bcdfae1ec9fab00d2718e7d6c4e1. 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/QZNMX2385130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99532704a0fe699b2de34ce497f18571e4ce051aff2cfa034aec2aeb69e0eee. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNMV2159517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be8a9fa1fa09b7ece86e581be840964ddc1f61d88b51502244ce2c7d84e632a. 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/QZNMV2150728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d43a0942469a8b71200b4c3698455a6b4232052772a0c23467944418c41864. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZES72410939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cba06c67f63f3a1ac7d2b222162c91f74417bdb337b3e4be52c186e1add670. 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/QZL382098800.