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 0xdb1ebbfe451a7a0cba4e4195b969f3066ac19834c7d50e792e5300a0bd38d3b3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4589e7e9-3028-4353-9c2c-5a4a692633d0.json and https://artists.proofprofile.net/proofs/artist/4589e7e9-3028-4353-9c2c-5a4a692633d0.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 0x7a235eb32b81547cc205741d229cedb06022f772a9795f074974cdf3f9ab5cda. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:09:25Z), 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/QZTBF2571891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb6f7f711a8ef736cbb9fd520624d4b4717c14a5b52cd4ea26de9ee14ce1f50. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:46Z), 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/GXESV2519331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c59e78d996f16db12e289cc4d696df0235513e48048d06ef8f70d3b4846c30. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:49:42Z), 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/GXESV2520369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f4450fb1d83fd98ef6b8fb19fecb4ba0b1674639ebcb9e7fc61c2355a70c39. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:14Z), 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/GXESV2512662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0636dce51ca5523541f50b507fd2a647c1f01126a19c95c1a831e7c91940b37. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GXESV2572374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e466d8c49a5c629f798a4a648ea0af19dd6e1737929f4bb609f68e0aee8662. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:01:10Z), 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/GXESV2588300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608c0cb66361059630107a9a36eb98e11b2e965e7e3f8df6ee1a22bfc1abd2e7. 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/GXESV2506794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0970044196216a2b5c427cfdfcaed75b75500a695a3e7a7358a61efe1dcf63. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXESV2503228.
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