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 0x41611450e2cbd0fd4695b84b3634578b3142155baf05360c2887905671ecb4e7. 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/296d986f-6253-45e5-9219-04168c53e4e1.json and https://artists.proofprofile.net/proofs/artist/296d986f-6253-45e5-9219-04168c53e4e1.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 0xe37a92dfd0b2d44b7219199d4c98653e1a32ab0d888d96b5df868b1ddc713faa. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USL4R1821081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37be6e305a2761f6d37957ec47de44d6af496796760440a46bd7cab4923d4c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4R1821083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2943c8e61bdd668c96223b75a3d8bbd875d770aacca421016c3fa4ea9bfc0c6. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USL4R1821085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64108f9d7560e6cd39a30ad6cae57079bd072440a1d36e69897a3607beeb6624. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USL4R1821090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639494d57a2ac9dd5f27f0381c262a5cf2942eb5656f00c689048dee162d0d29. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USL4R1821091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2735224f2d0353ad0f3a9cd4d794f2380ec4b099eb001336f4d89d3cb6f991. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USL4R1821092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc783a5daa6f0483e2145a6edf4d6b40d2d4c914dc786bbe06e52348d120e513e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4R1821093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914d6dc5ecd1f37e8120e12c0093d15f11d980dbb497baf58305c0bd9d1bcbaf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4R1821094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312ea7e6d88292c096f8959ccef5440a0a9b695354d0e98188ad3e28beaaddeb. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/USDY41811836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9817f809f190afbee5db2577d97135ea4da99a10d35ca1122ff187b0421f84. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USDY41811838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfd2dbcbd52fb1e225b00204bf6853b299111d2ed431a3dde6e5f1c677433d0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDY41811843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc576da275b797c26bcb645ebfd6b5de40408e44b99524f2b01915b486e79c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USDY41811846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08905cf1dfad1556fba689ab3cd2e9378a2bd6592a6f3c43b7cf87332ad496b5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM91989461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773b0ff6e34dd86ef8e68973754ff8c4be4bb34f26226f9de30fdb9e50665418. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USHM91989462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b4977303becd0f42c8ea980fdd2c3a22f2bd6b7311d82f4dcee29571b2a5b6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USHM91989464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820f222fc1f6c5191db9f8d506acdc868e2d18d6ddbc1f9050a730d27c5c5c1a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USHM91989465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056c220e7d2b433fc740888597f397e51333aac4bbeeb3b1e8bc8793e32bc268. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USHM91989469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93cc39b95f1c982438535fbfadf37c124b0a713e91a3e720aebac73b1dd19d2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USHM92000591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c1c8d412c0954e4b58c16f5d8b3e9d387d0ef0acc3d9040e68343e739d11b1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USL4Q2094648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf471e6619c0f6e87d8aefa12454b2583dd25276edcd30d4a812223da38592e66. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AR5UH2400634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f893585798b137c745108f778f79d4411ce51b3ca60bd04bbf4e1fbd5cd037c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/AR5UH2400635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a99e0b88df93deed0ecc73e451a4b94f9204717b3a72396aec62bdda83b94c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AR5UH2400637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759a76615ea843c5b7d721b7498832464da76e7312fa8da6e61c8208cda8da43. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/AR5UH2400638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b04c0751f56dfa5d0edba9112dfc2178e775d7430c760acf1a995f40570036c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AR5UH2400640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15efb81f52a608dcc086dfc41c6d1355c9050487d6a721285f0765cd552a4d9a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AR5UH2400643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05834846fe20c9e342e9002887c4a78d8f69762bab11e2d0a654427532263a22. 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/AR5UH2400678.