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 0xcc5891507171250dbb9703952ab4e913baccda1b1a28c9e6dc2f6d779beaa874. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6038baf-22ab-48b5-8449-edc5263c3c93.json and https://artists.proofprofile.net/proofs/artist/c6038baf-22ab-48b5-8449-edc5263c3c93.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 0xf55e1f0194f8c1b3809fcb1ca57c2d7daaeb44bc53b0da25199cc313379b84f4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCJPK2032980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eb421e412ec3628a9d40c26a1a09d499885bb7ff08105b8728d8046bb1c79d. 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/TCJPU2333054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3013908c49367979085e3b1fb995b065dae2fb375f0f1ab59bdec9750eeaa454. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JP92A2421368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d16630cfbf848b1ad670bc782050cc6ce72323cd4b5e649ab5f0dcc8cbd5aa0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JP92A2421369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbabae13e69dbd0f9ba54335b99f3c3f706b36593007ef3c37004af2137d8d4. 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/JP92A2422262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c99c2294d37f6d3463f0cf70f9b7c156eaba933935691f6e03c1b410464980a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JP92A2422263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a0c8eadc8c7d29d328a45bf6be07e65ad417b99865c184e9615958612b7e22. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/JP92A2422264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcb5e26d5de7604778446bc7bdbf059057ae7937621113a44edd1fd4676e79b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JP92A2422266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b023e7d9b4267d912323746b680d4c73f3585ba04a323dc7dd07d9706832061. 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/JP92A2422267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f6e48d6eb2c2019d8a57421eda3da26606a1e5bafbffb912d72ed979edf404. 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/JPS801837736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448b89ec76f6c547750cc5bc2b8696ffda0479c01641308a76c73a228db04c55. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPS801837737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc8f1795f9a6d0e5f75d247b4177a5679e99886a237221afb38a2c091dc8216. 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/JPS801837743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ff30554aeff19f89216e88a58a87c8a57a7bb11da7ba789720698db54b9888. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPS801837744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad349ef9d20589181b96c39595e4110d3015c122f39a75a570bd31286ff7479c. 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/JPS801837750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d92789681b31e75278901406163f5cfe7f39ffddd6f86dcdfd022f40827857. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPS801837751.