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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760f9efa39f9d69f24e2c9fba9a252b418caeb2e0caa1c0f4af354af919943c1. 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/81515dcd-3907-4bf7-9ed7-62233fb6c6a0.json and https://artists.proofprofile.net/proofs/artist/81515dcd-3907-4bf7-9ed7-62233fb6c6a0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b900ac7fcf60380933d7c7a09d0b65179ffefd3799aaecfbd8e606a39006a9. 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/ITI021900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179dd71d43f817164e36a765179f15f397bebcc87ccef98fc810cfcd0eb8b484. 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/ITI022400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4958f84fc64b25068f3b27067087d1a705a978733e180183fd7dc70e3c2c167f. 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/ITI022200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab8cb94e849c99f855f85cdc23dac32785d861cd88990c710cc9c227fad7dc9. 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/ITI022300507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de91ea0781509b67ddb98a3f8818449908187a4da8bc99319ad87b9b3229089. 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/ITI020800178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278898292c3115befb6a36225ecf3c538111d81b9616ba5a840e405fe0059115. 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/ITI022400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4913359497970db75bbfb05c15f32c02f463ed3f62fa50c2226d2e2645064791. 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/ITI022200431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bdad945d8e651ff1854499e0ad765916ca8318e6d7d71f465584a5d1220126. 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/ITI022300433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc97f38c3967e9f72f2ed152d52b09f53e1ff5d25e87e5de2aa9cb22db19b18. 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/ITI022400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a1d098c3ad22080805b6ca5d706eeb90be8076528602d59f91b393121fe3e4. 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/ITI021200450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0709ae54632a4ff88359355262988f57b5228c134325155eb49b1154318098. 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/ITI021600615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe2e991ae912fc6063db0eb9adebdfebb152f7b7eeb781dd784ed450e174493. 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/ITI021500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f430f04dee060962270aa5fda0b7a5ff6c131a1808139ce7e074b8d405584c5. 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/ITI022300559.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33dc3fa24049a980086d3d50ef32e3c2d0f14f71a9fdd372a7fdbcb4413cc47. 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/ITI022400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179dd71d43f817164e36a765179f15f397bebcc87ccef98fc810cfcd0eb8b484. 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/ITI022400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595f10f05a7cbb3ae2186f286a073cd04e41c82de33dae32be12e539907a0ea9. 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/ITI021200454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda57875cef005362ffcbb43f9eb8978c588323f912426aa3a495f1ee6b670e2. 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/ITI022400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc97f38c3967e9f72f2ed152d52b09f53e1ff5d25e87e5de2aa9cb22db19b18. 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/ITI022400145.