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 0x0de092067349a9682d54fc93f470f79e82e92c81152675068020aeda7287db3d. 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/227b4d5b-ccf8-4cca-98f6-d5c0827c087a.json and https://artists.proofprofile.net/proofs/artist/227b4d5b-ccf8-4cca-98f6-d5c0827c087a.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 0x3d1179e61e382799032ec6a328b6a79321b8b14471e7ae966ce1ccf0a53bd831. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FR2X42084824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd585ced69ca1608cbd89828d814f35a5eff2e6c4ee6a79c1b6f7ecfb8a8fd6e9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR59R2033039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de5ebe0e78869a2d34e6ef837d08812d8cfaeb42b5ac6a07207fbab2aacb3ae. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/ZA41S2102397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37944501609a33d07fc168d5dc9395be9ce79e5d09c6efb787a9e1983062d817. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA41S2224609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03412b72ae6bbc19e929f8973090d1f7283778399687ddbf0150d9a5510003f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZA41S2224610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308f9cf80041a7907536f562f79675448183c9bb3ad3525b88e8d55bcd6b7968. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZA41S2224611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf7e5db5f6476193de6d5e8c2a891c3665802e39894c213840d16accd441ab3. 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/ZA41S2224612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1799f2b87435036115ee0bdf6b13214268bead0744940d416d586010bd162b5b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZA41S2224613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33705ac8871d11696f79a46894479b4e68af8547ca8f6415fd0a20e641854d8d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZA41S2224622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b14c807ee71c020b40f0b088caac440e5a14490f45dcfd754996d1f17b860c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZA41S2224623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82c99b3bfad4fdd970b06416faca07d05244740019828eda3de3c1df6081ce2. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ZA41S2224624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6563dfa978bfee7c43f03905cb754a331d6730d9ff0c5afa4ee703b17c5940. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:30:40Z), 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/ZA41S2224616.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13413d5df322fae90c80df58b7c4495ddbb754be07dbe43cafbb60228db9c23f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZA41S2224614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2209ae6288bc485ae9ecd5961cfceba5aba94a225879132bfed95109077c8aa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ZA41S2224615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ace20d7b2e32b053c4c9c20cefedc7cec1dd4707802762cff1cb2c96c31e7e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZA41S2224617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f3cdfaf2f048e9c42e32ae5fd38080b33e06838ac50fa49ceb0dc8f3ebc69d. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/ZA41S2224618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf341a96f5c360f601b74871f600313bb6727a4d85ee4d9c1c4397a84f5057e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZA41S2224620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01a67ac0fbf982a482a8b1cf0012c2cccf1afdd68fa95c99018918f1e898cbc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ZA41S2224621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c252af9d4ea20c6afed9218b7ae50c218d247f8cd06834dfa0747eba14bf1d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ZA41S2224625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ea676efd06cffc6d9a868d15a7627969c3cfbf8f7c8e9af116bf8e7f6e2603. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ZA41S2227089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb5efe47d0b09a604e9dec3bb958587e3cbc272a3df512deaa8d1a9a6f77411. 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/ZA41S2304094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f9691af64be8c0e9a8fe4b71d1296d4e9393c35c6a2561cce0823769f280bd. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZW9L2428249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093ad3158208546c06390f0467f4ecaa84a0ec28c02fc2c808f1388a600fd811. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZW9L2428250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5f59a361f72c122e141545aa8e780daaa32cfc8163948b0334a70eb38e06ad. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZW9L2428253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70a7e7ac05e9203f304656c67322d8ede2c6c24dccebd91c27c9453ae3aa3fb. 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/QZW9L2428254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bbdc36d05e1c4db1e906e69701d2e2c74e89ba3cfd5bdc27c322443e176e8f. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QM4TX2351556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fae14bf4451a10c9a5ccdb89789593ab8f053a1c5756656b35b38d5a862332d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM4TX2351726.