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 0x9719586e022152ecdd79a434e3f2efe54d99a293e023a0babed67d82303eae2f. 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/a25064f1-9466-4be4-b5c3-1f5744e95061.json and https://artists.proofprofile.net/proofs/artist/a25064f1-9466-4be4-b5c3-1f5744e95061.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 0x2216e3e05c7bdbd07971b39976cd2101b87d17dc3299b853cad37cc30f7da8e6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZAKB2344274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9aa286c85fd6c836d8ba688be63f68ce1ee1076193d8df9b7c2073d638e10ad. 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/QZAKB2344278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f379adfc9e6ee4b5c472b2f99d4517a4cc61a4737982d183d204103bb2fdde. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZAKB2344276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f2611eebaf08b2af7a71f6737ffcec1bd3d596a33df92e8306a1bd862ea949. 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/QZYD92300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08860e910cc5310e9cccd8e2eea08e0d9d2bd33ebaf7a971f588a8eb541139e. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZYD92401837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e8d4402167354baf29b318c811883c9d4290098acee246036f48d89d8adba7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:07:24Z), 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/QZYD92401838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf211a53f843091ee65230c78f31fe66b51f7cf20b0197a79595fd1bf933fc6b0. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZYD92402540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0665d717df5909e791b8573887aae0cf436f78f44867892638e987623f3cde52. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZYD92402541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4815eabae689b791c263af262732be8edf2eb018c9d0d6fc7f45c6a57c1394a7. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZYD92402545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb637e66f8725d445dad15d18f3cca56760b06ca66a383bbfadc89260c6bf8a. 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/QZYD92402543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fadce8a4c6fc361d022af1e25eb2e411045426a1f530e25b494eb66076df28f. 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/QZYD92403348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c1e3334c87e5c4c6193529368694f182d4ef80d87817b6e33a134382595047. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZYD92403349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9ad49c66ff740e24426e631055e7cfe7c71d9cdcccd5fcac3514b880a132f4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:10:21Z), 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/QZYD92403838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cbce1a1ad97cda8c9a98e4cd9fdebd8594675304aa9a91b21118b4fb410b36. 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/QZYD92403839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecf6b9accc956a0f0c46a11e53522da024554c6ba096c89e09c88270ad600b5. 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/QZYD92506777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981966b820ef56e8c500704cc74f5bcef1a6c0c8af5208468b322bebd9200fc1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZYD92509403.