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 0x5671db086da8bc6d1db11bca654f6d9c762e1877145c7e346fd5eb05bab5126d. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c39d0b6-65f7-415e-9f02-f79a2cdca354.json and https://artists.proofprofile.net/proofs/artist/9c39d0b6-65f7-415e-9f02-f79a2cdca354.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 0xc600183818f536eb7ae40de6e5a5eca7fae737d195d39a249f3978e9f5c57137. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:45Z), 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/TCAIP2436737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddd7aebe7302696e01164476d26be7723e9bec812a6c2cce4ff54e52124e8cc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEYX82223527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f0f536e7647bebdfefc8361611625683e5cf663cce0e5422b320ea992b8655. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEYX82241161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7fa84f792831a786b879c5643e1122932219ac5a7400476b65b7418b62fcec. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEYX82247417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26cf841a2d5e2c5228f054245dfc8bdd4121371c1df258279c3e50893a55d1e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:44:58Z), 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/DEYX82246854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e816f4df201f484cd57f63ceeb394d548ca10b313d0ee53e7fe52464f21c663. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:48Z), 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/DEYX82248214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1870ed055c7f1c6883c3d63a443e56b67edfa050ac7c4e20a2bb5efb2c5c325. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWDD2581609.