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 0xa9736a797489d4d2bed0cd6a50e215d66680ee02cd9ac22af0aa08460cbc880f. 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/2e614d09-1130-49f8-996e-13f1a1f7195e.json and https://artists.proofprofile.net/proofs/artist/2e614d09-1130-49f8-996e-13f1a1f7195e.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 0x6f279f0243f2c2d4a7fc225f85ec06b9cab9433c92553ca6d8a7643290a45e86. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMM2F1580004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d407cb1f11de68f502dce417a5c907a4da0644777ed86b8d8408dca571ed9b6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMM2F1580005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa94655633a0f7c0d210c195a47a5aeddf0f030fb3ca4d1d8bbdc1fef0555fc3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMM2F1580007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295b7a48a6217dfca1bf45e5791b3c0f2d06bf6cebba90af150a50d2e3f9dea5. 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/QMM2F1580008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f78107f239b76ac40514b6d67f5dc59723e15e2dfcd9ebb2c9edbf25aa8eea. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QMM2F1580011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40f2614c12e291af111e0fd273525b6bef6b17c0b876d1b6a5e9cb85258b48b. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QMM2F1580012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed174ec49bfe2a7a1a8fa7dee04abfdbd34838714668612d0413852dfb50713. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USJMZ1800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0102648d40ef74c269269ec87dea11b39a3b3b9e5684faf2a09ff19f72dacc14. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USJMZ1800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce2f88ea3731255eddbe723b171f52cbc9eb68542229c10a4457a33ff926a98. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USJMZ1800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f1006e8e1ca7fe1d53ff9f89f7e7f5e1a50a77e3d08ab05c8600de0f9a439e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TX1989210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd41bd80a673599f24c45200b1641994012eeb316c9d8a312fbfce6ea7b1157. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USJMZ2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46fa853c9b2add836f06d73f9f6338dada033fdb0c3a14df9ca91bb5d7ecb01. 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/USJMZ2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5d7b852daa47136b17dc57f552777a4ce37e9f750485287e05b2d232f51669. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USJMZ2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dae4364651af078c7a7f4f205a347768937bd098511cc42b57918b150985b2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USJMZ2000026.