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 0x0c66412bbe13a24c0576bbaa566c390200bc9c8df674bb1125e2518c04b09435. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8af82e2c-69a0-4247-9dd6-b330316810a3.json and https://artists.proofprofile.net/proofs/artist/8af82e2c-69a0-4247-9dd6-b330316810a3.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 0xf56a7b66dc0b1bbb638c54c4fc6afea8c44c54f9a162aea58d129863b13743df. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZDA62101119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cff100e282649e16b3fb865269ae8b0791ff294117d0b035f7a8a5787cc82d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:10:18Z), 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/GBKQU2219103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a16ddf7ce7f99a09c28d62b5029d5a4b1fbee8abd361cc1f600f9b4d75b447. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN62409257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930d6be45d190f8f8900becc523d1a17f5872ddc613558a6590b6984cfce6505. 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/QZPLR2496450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af2ef487d52d3452c038650fdab1792970e72c3714d7e3488227a5410264614. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFE2440877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa796ab9e75e49c188c47ee6d5833791d659d20811a916a5fe5354dc88b63402. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:26Z), 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/QZZ7M2437641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d52eeb4419f86e40d888074e0f55afc3014ffe1bfd144330c8e8a81e1f782c2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ22562421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4340abc6deda2b21f2fc24b1f33a8c06ca7b71a00f2cc2ed698de2603ebc4305. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZFZ22562422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259e81e8ff2fbdba591b2ac2b934e4f2cda7adc57d9296b1c3a2c10302054ccd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ22562423.