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 0x227f7269133f70f6fa9c581f6ae6f747c86de7e0ec4d2418b040928708f23815. 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/806379fe-2b28-4adb-bac6-56f5d71c3e99.json and https://artists.proofprofile.net/proofs/artist/806379fe-2b28-4adb-bac6-56f5d71c3e99.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 0x014e6d58332c69cc8f2bc89bf8827f800cd4cf4d97a39d2ae0cd13f8af7116a3. 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/MXF171406530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff3cf6c0b30be0a56fc0c135c13338ea4f115e2b38f0f54a79a54b9f47b2259. 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/MXF171406531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47969bb9d0d8f51f773ebf5e8c1ff4fe9b4fd0f25471d72ac0e61356074c4585. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/MXF171406532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b409fe887ed28cd0c3014a53eb1e27174e4567ed5d7bdac84595997d363a578. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXF171406533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc29a637c14ebaf8141838bf7db2b9a5f4cd53658bec961c35833b76422ea226. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/MXF171406534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90031a2f8c09a3620ffe305d6aa2b10bfbdb7add3cc8ccd44fee34c88b44b211. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/MXF171406535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890514b787c63624b853d6d364e20dddca5970187b767146ee3ef6c361aa9867. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/MXF171406536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b87e938bbf9cde82fa7111d732871f35096dacf4e2861fef8211a15853cb9c9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/MXF171406537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e93dd480ed1b6cfde5910e3aa0088871e14672ac8f87a43c3bd1e598121ab63. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/MXF171406368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cb340c16b19fb1f5f16dcdf0db2b206eddedd17d0cf7e090fed67664eea266. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/MXF171406369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec45a99c0e5fa771313aef88891109ff3c3b2b4bc4f3c3cb26a801d2fbd3f773. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/MXF171406371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b8ee8a5f1ef8becac4ce2a0a6f488a1897c6e440ba07d748a43b09676f4e66. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/MXF171406336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc792fde3bb829173dc24ac20cc493bdd538609dc3227947574ef50d892dbd7c9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/MXF171406325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb0be59db46325c094e56edfdb094a106b9f5a7f2a4afe98197e749b65e0728. 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/MXF171406327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd656e97473a51ee2281ebc73fd5c3c75f5d960f70a05e82c15fea548f6c05d98. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MXF171406328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709cf4e63578057ef7c75f67c41a6844d54ab2a538bda5047d63ca51f6091eae. 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/MXF171406330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf916cf42059ff28273747fc219ba77396a7aee37abd71aa7f2658177230ce97b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/MXF171406331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44caefc885ccad78d2e1f30e6fb0139d33e75d805a299bd771efa286291e79a. 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/MXF171406332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205c901a21e0f33ca646c9e87b5068a270bc34c1231850c20c62ae0433330ded. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/MXF171406334.