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 0x2bd07b553de9f0d9028f3564ed56a94c5c996e46395d4cdc97504e396fbb62d3. 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/c5d148cd-5a34-4c01-93fe-f3143b41dcd1.json and https://artists.proofprofile.net/proofs/artist/c5d148cd-5a34-4c01-93fe-f3143b41dcd1.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 0x3e14158cab313764fc8c7e97607e6fc2d185d0e0b8ed1773b2f7d9fd68b5b45d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEQ2240580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7604c5440c29f35a233ebf7ee20d074083b5e7d996b1bfbb85037d640a230cc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWX2040711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b7f96abb7b3304039c190b1c3df3a6a419299dd8ba6004aa77688ff5e2a5c7. 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/QZMEQ2366245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df46bfd9cd157d82e8c081fc483f0883f88123166e6ea1f7f0ff5c083273fe8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZQAY2441972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e8ca98049abeaf83892b226b257273b62f62ed1b25e42b0ec37e7669955606. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZSYP2459566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df46bfd9cd157d82e8c081fc483f0883f88123166e6ea1f7f0ff5c083273fe8. 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/QZQAY2441972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21966208eabb77b2a1c313005d646c721656d5eee4affa7d88fc47532146361b. 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/QZSYP2437935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e0bfa98e6c62fee574116035d179226ce585dde435db93979a9d15a86fed90. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:11Z), 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/QZSYP2487627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228e17558da23a759198cc82c5e88b1c2d53b63717a557da69b7cb04c92bb66a. 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/QZSYP2464620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625aa4b8446c0177778c79ec52b6741975ed45fb94753b7a3ef5027e97bc9c8f. 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/QZS7J2491269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6258f8879fabe726d9c9228b163cfbfc442371b0609da3147c1136dc420eaec. 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/QZS7J2400844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444d7a0fde2499c306e965e36fe75e54826b26270bd3d925b337c2a7f21ef694. 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/QZS7J2489312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc44a44e173f5da3cfe2faaa80c93054bc6470f2dacd67011c265889c01fd66. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZS7J2442611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa31b9e9d56ec4280797ed75178bc125ba2c86ec9e3a95514cbcc853a76b1bf. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZS7J2495778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3787a47dc243ec9c6b4b8ae9f67e62d1d1b05ab0c6225b7927703144c48ac53. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:01:37Z), 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/QZTLA2589203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf081d3d824ed91c5a237f2194be6562ee6b12179579eab4fc1dcf6b425f9bd. 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/QZS7J2517140.
Bring it on Home to Me (feat. Charlie Bereal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31ff52d364502f76f36f01447f6589fb888c009c7f746c66c6840e35af207e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1366800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc555838a8424ae05a144705d57e79c75b478e71c0628d61f691b4c8e93917f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2404561.