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 0xc0aa70fc1008de27a96872a36b95160675c32a852cf1561468d7b3307e5ae76e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3e5a167-3bfb-4547-9f45-78d39fd0a1d5.json and https://artists.proofprofile.net/proofs/artist/a3e5a167-3bfb-4547-9f45-78d39fd0a1d5.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 0x30c525e59aa9a877f7c6a5b30c20fb5343b5cb4df926a30f2d1f01793ec9c51a. 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/QZNJW2196185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94de5c3bbf69e5189d3ffbafc8e70ff0d1fffbc7a06db233ae6b492c49b3aafb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:20Z), 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/QZNJW2156717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0129ed8c6350c4713eb1e13f620c7bf443a0ba5112286ea3e933c93f4731b7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTVM2405318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d0c3a52a5b9de8bc53033323ecd2fea2dbed8223e787f272b8307eb0f02979. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:18:35Z), 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/QZTVM2423849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8027e1f39110a7838251f79413271439b97bcbb40783225f011fff46c222a9a1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:16Z), 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/QZTVM2423850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375039dc6352aa856b6e21ba8c66930234f610ca2ec2bc8303294635fddc3c20. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTVM2423851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a0db1e2df0b138ede5cd4402ec25903d7cc679c3473dc94dbf6429b0d04787. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTVM2423852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b618c028dc6666c500be874f96424d75770cad1bf9895325cc306eb638f5b6. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZTVM2423854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57669fa119b01b8059d0bb377c5b103c03dddba1b73696c883a634e64d5fb57. 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/QZTVM2463111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5010c3ddafc6edad8f3749ed117fda14902b500b57070caa38c29ec4850404f0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTVM2463112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44ea58f2978c747ec6d0c5072e27242f1321b2d0d6260f89a21c26965286000. 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/QZTVM2463114.