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 0x8832b6f9f77ba081752dabdf33a7295343df7c9b0a6466c0e6cfc2986a61ca07. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82e4f533-762a-4f0a-aee4-bcb15869eec7.json and https://artists.proofprofile.net/proofs/artist/82e4f533-762a-4f0a-aee4-bcb15869eec7.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 0x30d1554ce47d4a3ebb6a4a32400b308221198eefbfd5309595a7d42361a7239f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZFZ62444658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25609ebaee52565fe7017cb22529db82d58aeafc593621ce840e2067451383f1. 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/AUMEV2377304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bb9c91d5a787f15a741327c4b828f7b6d30f380f5222def5a977701465801d. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/AUMEV2377305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ce8284f99b8eb63829a8fdf99c195f3ce7b0efe8a57f68dd2013e5ed931e4b. 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/AUMEV2377306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec22ec551e06d4e086bcf6c62c42f95a689c811e7a2662d5125798ba05bf4ab. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/AUMEV2377307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5ada3b8a20163cada243528710e1e21e1e7e275049f68b32b9ebb038286765. 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/AUMEV2377309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3948fff37ce7e20863a120ee624bca861716967f80626a064734f13354f6fd58. 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/AUMEV2377311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848eda329ad30263aaacedb763ee965b0991dddff02ce43bfbbec87e6cd44c48. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/AUMEV2377313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33ee4df0fb11cffc096ac7410c78e90d15330cea88030a3544b559cfcbf2569. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/AUMEV2377314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381637dc0136bf206b6aacc06abaf44a1bccb99db7fbe1f185c1c28603aa6f17. 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/AUMEV2372809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a26a83fa6f44b31bd639bfa050fe84c71206c3f81bb1f11ddf6d290c575aa7c. 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/AUGBT2426944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d3f2115f0c0284d9a41e1db67caf5f451ba34de2d692613f4f438a8e99c174. 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/AUGBT2409139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d5d52ed18f545496ae6070e39553b3e3949ed11e5db450d4b1ea434ea01b2d. 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/AUMEV2435906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0532a8d66a52c2a7bcfac9625d0642abe5b4c87374543e681d9a83980a01d9e0. 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/AUMEV2416379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba79151cc50db98fd5344ee24cbd5d3898827f1474c0828632f71d25aa6008e. 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/AUGBT2316741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d02f6f4f6dc8e8538116c8bc412c61f86c39d6888a04b794a9af5e5852622d. 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/USA2P2231493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ca1fd60ad11e99e2603ab8751b2940ed1dead7c70d6b1a508234a513382f7c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/AUMEV2496382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a666e0dc895a402f7c23c375b12bcbc7322f1d8fc080eb91ec415bdc0cd4a6. 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/AUMEV2496383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3021fd7afbe19d8997746e11addf4f6eef899e9d64d077486e3bcdd1849105. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/AUMEV2496389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e13691e49ff1363badb8133ce96756dd391556d09ae5a779581b8b1fc7de9b9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/AUMEV2496386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e3ee43c4e546e61bfbc578ffffae9f59f78c45f6ab77a0701708604975d6f4. 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/AUMEV2496387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53b08dd2e9e81cb38de97e873ff2ddae22d536a4160ace3508ce2881534c9bd. 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/AUMEV2327725.