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 0x9259f26894d454c57b19b150795f4b3a33e44def62ac2c64a127358589c7883d. 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/ba81d1ff-8bef-42c3-b22e-8bbaf4356c64.json and https://artists.proofprofile.net/proofs/artist/ba81d1ff-8bef-42c3-b22e-8bbaf4356c64.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 0x9adb850aaae27ba92ff1a18da8f100b725b6e77b31a75fac0491af8a53570c1b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCADN1855946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b49309c76282c8fe69dd815485a30877d178ea2adb7de171b3c54b1c1f94985. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAEX2070753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0316dcbe31482aa9087e01f8129de2d8c58a551582a7a38c896227d6ab24b26. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAFG2056266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72157ec35689833b5c6eabd8556df9c0c39ffc3eb56c609a4ecc390d3d8c34be. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCAFG2056271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177309739bae5a5c9e5d6635de2b457c1e33d574a5d2434ec3dd2e645cac227b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAFG2056274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27174e7a3a9eeea988b4b93fe84b9320f5b1cd2b714104fdbb9ebc589bf09010. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:36:01Z), 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/TCAGO2280948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187c162ad1e82bffe50e5a9d0e75edbccc6e25bfd04f87721324bb23f39237a2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USA2P2355433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e048786a075f95741f36b6b8b82601088161aa3151e448522be76ad799912ff. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USA2P2355434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4c61f150497cd0a56d87c93728b28c11281f40602de73be4a14f7a0351e4fc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USA2P2355435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17843b42faef455ef283c5ac2945b07730e0881935acebb3ad88ed763161cc6a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:42Z), 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/USA2P2355437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f31ca5d19a719c7cb41b1ecffaf08361cedf9c7b49896b44a4ac942e2e9c42. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:29:16Z), 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/USA2P2355439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7553323bee7a7279469bc2a3a3c679832227df82dc10d7f036dc5aa46a13180b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:54:03Z), 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/USA2P2355440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51e4a17a7c11fc28cd242767dcac6dc785b7159263dd31cc910a4cb6fab72ca. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJI2582163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf0ac8e55352dc58539b79aabdb7a5dc517b36513618eaefb6d92cc08bb27b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:33Z), 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/TCAJI2582184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90b92c19f612815a664034b356ba5cc97f2c8e45e1b000a7e045fbbd75b9ad5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAJI2582198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5ceae393c65bf88d07a1c4ee8179c7e17c1f1d2e0d7259ff709365f477edf1. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:30:56Z), 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/TCAJI2582212.