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 0xc2700cd32a72acd40538a97c40f91bd075c08fb2b92ef683cde50f76a4d23e8c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73dbcbab-3d33-4f85-ad4b-accfb3362066.json and https://artists.proofprofile.net/proofs/artist/73dbcbab-3d33-4f85-ad4b-accfb3362066.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 0x3080e33d7ff76466cf47a66b82fe1e960ecd0280da88d5988455a5caee3b9afe. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/PLB822000469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ca9d5e1b1f5b8cd3e3c0d21f29297a98636538da9a26c1d55c86e37466f8a5. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/PLE781401022.
Piasecki wszystko wyciągnie (Nie chowajcie mnie na Wawelu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5e337c2828b9d845e8ddfc088f6e31eb853dc36419775a77fd00a0b3484507. 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/PLE781401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07115c38ec6f57eecf2f3758c08aa59b4845198321c1a1ba91b9d3668e44df48. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/PLE781400884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aab9b432974b18d6d5867fcd59c58b0c52c4b112ea1edc11de62b4f158caad4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/PLE781400885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c4d576dc9968210c2e0f97d3500a18816c6182c635aff70979855c33207d3f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/PLE781400894.
Podróże w czasie, czyli park, rower i wiewiórki
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a410163986c48a74209aab9a603b48de826f5b6c34a74a44d4cd58467e3e47. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLE781700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3531e05733d535295e76b79838a29d143406f1e9b7bbc664608833bb0226a5ef. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLE782100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9228b519ca5f80b3114717d608dd0e245bcc2f380b886adee332f04ecbcde7e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:52Z), 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/PLE782100091.