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 0xa9fcd3dfc8e01d86045ce8d8dc6b9765b53f4843466f63b0fe284e097305ae36. 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/00dfbae5-2471-48bf-a0b1-92438c720b9f.json and https://artists.proofprofile.net/proofs/artist/00dfbae5-2471-48bf-a0b1-92438c720b9f.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 0x40787ca9c1ec3528eab66241fa6c8a7d97f2c8b0d0b89583e70f858222776a3e. 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/QZDA81909485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4022f2305b3234aa20829e1c6d43c6ca38b624dbbfcbbab4458c58672d7099d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:54:15Z), 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/QZFZ32049103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79acd37efc6641d0558fbdbf1fa0859c3aa908c9aa184de7fa6a826ac6ff6752. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES62075102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0568f9e834038cf1b266b987dbe506b163e6d14626f7f3f26b4ae3d77ae89d4f. 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/QZMEQ2085972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe3d87caa9b02695f92b18919e7df4af6ce83aa77839e791a98d8811cd3eded. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZFYW2105195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf8f263bbd9c1b43895a06f11d13368ce8394108b47f71c755fa2b949d5a3c2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:52:13Z), 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/QZFZ52171532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43b397269c5a58991b82b450167dff0c12b8afd23dc80dc49b8293f6134f568. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:24Z), 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/QZHN52255788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d359bb815abae5a2922f18a0944930c451a8ea6c4d0ad6fa80d7082f8ca5fb6. 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/QZES62392245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81f24b203eaba2687dcf52f87833cb43cae754d9f203cb547db0e4bfd3a1c98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAGOO2300597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703a9f508f0700dc88b25c015ba890609098f4fde131d7a6a00c3b5b0daf9b42. 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/CACWV2410615.