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 0x7909921d4e8a19ff3e3dadb45e84d853e0da8b558552f580f949a5801e4db6ed. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/231b92bf-fa14-4d3c-876c-5d79235f40b9.json and https://artists.proofprofile.net/proofs/artist/231b92bf-fa14-4d3c-876c-5d79235f40b9.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 0x51cfa1c2940c875431cc7904be1893f922f4e63e3451858bb41b859bf6a91b21. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NL5UZ2504516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc726b9a5ee5db98c8d63c231f97f6e53a5b720722e9ad57067c5c8dac1956c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/NL5UZ2515358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f471b52813d00346d032852b7b8c99ba79482726ec648530435e9c68d0108da. 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/NL5UZ2515359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed92ff71741d447dd3e5e297d67b2da622f6f19629735c9608677a561954da9d. 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/NL5UZ2515360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b823948c3597ee26faaeb0e325c1e7b97f80b6c211d4b550222be0c320f2d5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NL5UZ2515361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70301e596276eece4584b7af692902a74570afc37dae284717634d8a1dab9ca2. 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/NL5UZ2515362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e44ee30c5e13227f86b05360b4e5afbbe8fe2a03cb33f5e87f0115b024001d6. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/NL5UZ2515363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833412034be178f6bb14123bcbcb0bbaa1507141362f0e1139123a8211360bf9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:51:32Z), 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/NL5UZ2515364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4cd36de752bb3c318ba7b3c51bf0771f83bd3737251ababee333dee027797f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NL5UZ2515365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6196b0701d33af0f0a2f4f46852615f7960c186beb99d83f3b9cab9acdd4e7b1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL5UZ2515366.