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 0x7842ecd1743c7d9fd48864f45d4d962d0e29eb934f6b74cdd741b5406ddcd82f. 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/edf8e439-cf28-4ac4-9df1-c03682c5804d.json and https://artists.proofprofile.net/proofs/artist/edf8e439-cf28-4ac4-9df1-c03682c5804d.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 0xf17fff7d8458675107c4c7609bff7a3a6c913c900740f0abe6aec25321ff4273. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/SEYOK1900657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50098d6e2e048d1a9b37d86ec951b2594e06b0eece183e557000fdf61115ae2. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/SEYOK1900658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfdafd1e66a9c6f3814baeb187328b9daebb0e65e0a4fbb9fa765e38d09761e. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/SEYOK1900659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f18b561141d06c4b3dc465f09150cd13bb6e524b055faccb28e13c13d011da. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX762193374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970ed9ca0c34c40a9b0761545eeb6d57684ed3c76073ffa2b434fd76c8816e3b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DGA092325161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee1ccf3b738f375867f8ae24646a361d8bdace38949ad5c96b197d28d25790b. 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/DGA092325162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084eddb744a66648b212eba9e160fc222ad330185ad603ce51813447f177ca8e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DGA092325163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789ab07618ad2b6474dbfd67e34eec87b92b3ce669d467e323bdf80cab62949c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA092325164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77d17fdeaa4f2397a9627a6ee4bbb5712e3685084454edb4e1560e65dc7d89f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DGA092325167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d5742544bca20305b132c3570418ca00d4f55860eb9da839c90169e71d4156. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DGA092325168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87b3c338c85dd6d77a8e31efef7162c81760e1f084bb834f295fe8e513e1d85. 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/DGA092325173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ea235d80176a1abdee862bb4a4b5cba1bced2cae28b1637fc81363d5fecc68. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX202457880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbd9177a0eb57786f267e166bdd3ff4881bf5e9bfe7cba92aa8308c154382ef. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA0Q2454088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ea235d80176a1abdee862bb4a4b5cba1bced2cae28b1637fc81363d5fecc68. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRX202457880.