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 0xe2132f89c67e429f1532507090b619f72233c8c343bb05dc8a737c7dc76a52d2. 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/9cea26a9-abae-4e2a-9249-db6901762d68.json and https://artists.proofprofile.net/proofs/artist/9cea26a9-abae-4e2a-9249-db6901762d68.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 0x71a83e5364fb83d4387ef5096c81cf1b1b80d19cc95a8fa58b77cc3ce9fe5ebd. 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/SE5BU2390747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bbf661fbff07a12f5d3810ad907f5068aa38673dff150fa8d9cac5d992a97c. 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/SE62M2298188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8c6d18c9fe7b2a6fa37e652f566cf38f933955784cdfb6c08f52bd1ba836a6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/SE5BU2390774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c1b8a4e9de8413380e7525c0676eb7ad27a238f6a1a21847013a367b6f823b. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/SE6HN2307208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d628988110d92bf63c649d8abb7829e22d20346544ebcf22a62e0a716b22a1. 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/SE6HN2358848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1345d44f35c92495017adf7d5757b89965196c10ea4f2f12fa04fdac9c6c90aa. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/SE6HN2358840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93b82c3c09c322f6841bbe651f05583d59c6baa284522ad82adf07727069b1d. 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/SE6I32362192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15f27fad7388ce4f5a62c5be9c074ace0bffbc6709c417edbd7a7e304e0c564. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE5BU2489380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166c20ff25fb1f80422c1c9efee2f9ed00ee61c5c5567713ce853c3b80e14fbc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:38:42Z), 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/SE6HN2474529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16abd27331e4ac26695cb3b792ecf2c6f6a6ddd578d456037d157c579d74ff61. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/SE6XW2403897.