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 0xa57926c9d83325ea086881b933f71ed8ac5b31e6fa8c066888b8690c87a05b0a. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75db8dbe-a265-4677-a324-58b717d7e305.json and https://artists.proofprofile.net/proofs/artist/75db8dbe-a265-4677-a324-58b717d7e305.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 0x6d061c01b5433c756c2c25e1ea3f6b175bba468651df3169ef330690a25c632b. 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/GB8KE2412162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445ef6a7f87fdcb6ebadf07b8b180248c9b3af78e77ca9553aefe2721342e542. 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/GB8KE2412163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207b8d7fba6718eb6fb729c90948109c456aac6d76c3a211a9c726127055df10. 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/GB8KE2412165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e2158920b103bd5d46cf61f5f50853b8a9d9469415b836a6deb9aff4239933. 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/GB8KE2412168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4342143a38ab29300988c798f05756282711767189bda7c3f350ec6c19263b. 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/GB8KE2413250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca04d4fe9988bf782399282369be0a657983f482b96c6d401739362fd0ff2ff8. 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/GB8KE2410329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c0648ab828aed0d641051c0c66bb2e733f9865d8dd49fdcbbd11cfa7fdfe83. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/GB8KE2410333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f588719d0fc98ed092daf405d34bd95f7f29437a756a8ecc4b9dfcfb0d34504. 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/GB8KE2408282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123319f9873d0d5cbc06b4a721417685e8b62ef703e20982c74b9a042228af09. 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/GB8KE2402777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3315b3b3ba69361d75a949e666a5b2cca05df482b375973b0ab8c66388258d31. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GB8KE2402814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3218dc79a832a86e7aad368b8da9b61c43d7c0215815c51cddb18ef40d40b459. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GB8KE2329347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacd536dc113d8c03cbce561beb74cf7cca8d91daa5e0ae7c0b4815f141f408c. 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/GB8KE2329348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a87318d4b3cd95aaf5c274040e4c375c5acad313496f8f0bbc2894669769dd0. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GB8KE2329349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d997e13fe77b324050add8bed82a21d86073d89ed7ea1a3ede632912848d30b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GB8KE2329643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0a87658fd52f1ee721135e0efde1f74a93f8d78733fce85d433a84b0032b86. 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/GB8KE2328281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9d7dbeca7ba98bf6af4027b5d0fb1f695d4e5e6a86f7d71af49486e997b260. 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/GB8KE2325472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723642dd2e29fe700c36dd966533773b242c90206d602f90b52396169adb5606. 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/GB8KE2325473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cad7d28b5e0372d84bb534fd6e6c857f86025e34f183b12d4efb047fb72dbe0. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/GB8KE2308384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf739af9c7a28f316cce4d6f5783b18b3587c244f262bf80bbf4ae7d6bd0bcd12. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GB8KE2321348.