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 0x80025585c42c148a2601215973a1039713911ed47c09951ca4ecd6f2a0208361. 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/646ba891-879d-40a9-92a6-665dfccbd17a.json and https://artists.proofprofile.net/proofs/artist/646ba891-879d-40a9-92a6-665dfccbd17a.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 0x14012f221d9325ef3e55b86b7c383603bd221befb0109b574cda1a4d1a62b105. 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/QZTVM2424408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b90cbd87a62779a29e6ba42cd83a59ff03d2b20acaa1d0ef9f62c16c14edaf. 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/QZNJZ2447680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107a3c2ac4b273ea5a8b3c4b6b06360cb2dd2ef657ab9566bebc41c577fe9163. 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/QZNJX2485376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd5e8c0c934753599882e157c6b96653ca330e83b1dd795593a0d6cdc1a9a38. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BRSVB2502210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014fbab958c903d78adbedd127c7096dd032503f510a0f3e6df3933dd3daa35d. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZNJY2453234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a4da8d7a9a42a7c5ec692c79a68e09d28863b0e6eef26db3aeaeea41421d3d. 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/BRSVB2503818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11144f0f826b4cd077f73acc31ee34fcc6827593f4cfb6bb1e16083b8f22d7e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BCHFD2400367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6234b0121af8c4d057b4b337c58e7370d61ca377aa35db262f252454a99dd3. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BRSVB2506089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7e1c7fb448c36720e233530450fb192f28635b02cc69874b1029e97ddaebf8. 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/BRSVB2506264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4101a2e542c4d24ad8acca110727bb99d5061430e2340893fe86151b6eebff. 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/BRSVB2506091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f46ef6850620f49c2b6f485ccef7ffa1fbeaaac2fd5b2f6eaed2ca3f28ec36. 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/BRSVB2506366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8048cb47cb37fb5004dfe84f47ca469ade2acaddc9ae0af3d0a8bb912ed91355. 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/BRSVB2505581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f9ad0f5331c6dba83c2ef471979cc46ae645cf3f1c26482c3d011b5aac518b. 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/BRSVB2501348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026b7beacea35aed8676b42f003e881ff0b1a08502059cdbe2cf71ae68995f59. 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/BRSVB2401400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285700692af699fd903674338073b2a3294096708026ae4fe4d20f29e7fd333d. 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/BRSVB2401134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9781ea20f9c5cf785acc7b8793e6797dc1cf583f9fcaeddc8c97352ab1f2de58. 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/BRSVB2401024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4808c43eabf005faa8e36d1fe8f8776ea655fe1ebaad5360bb485f860ed2cd13. 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/QZNJY2452630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc81b9e4d6a026323eab6030ce288a633005251c8f7e0cc3b1fec856b6414537. 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/QZNJY2499706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af41ceba649884c1a35060006ed0bcf35c2196bf0e3407f970dcd5d483e20d0. 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/QZ5AB2430514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5d798328a185aac17c4073e8b192575274cf75973c1b58046b5799242fb7b6. 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/US7VG2412776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27b4764503f2261d3b3591a19f668404b6a0e44f8d7059410b1405b67135e79. 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/QZNJY2417950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaf2b4962cd4195ab783b0adfdfd028478c9ff3b39c5900bc104d219bcb3d4c. 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/QZNJW2496968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a0482b786e8ff2137063c545cb476038d2cadade49e8262a4ec3e44b7a8957. 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/BRSVB2400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40edffdcd5fa66091e6dd6a45d7ede6d9329943c4bea42e4d024e01d76b1983d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZW9L2390289.