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 0xb7c33caea3c8689159bfa5efe7c6dc79a3643f00a593f1512182798a7221d6f6. 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/87f03aa0-0baf-4f44-b7a8-9364ed94aa14.json and https://artists.proofprofile.net/proofs/artist/87f03aa0-0baf-4f44-b7a8-9364ed94aa14.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 0x8eb41632c9b29948375eeabc0473b5115f901054f9f86d026157085eaabb8d7f. 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/CALVP1959768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1ea864a7110b651da75cb126ef94234d365075fc10e8a0c146979dd296aedf. 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/CALVP1959780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21930924d3115084f4d6d36e1b5584c46f11c99ae4320b24ad278ed895103461. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CALVP1959775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112832c0c94deaa2041fe7f6a5cac29874c1f5b3e8ee23c01fd1cea2eb66750b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CALVP1959769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ea8480ebd9acbb87fe9c681ce39436da96d09ac78d4371e482a30cc25709d3. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CALVP1959777.
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 0x42bcd73bec21043c30f2e413c47382c2cb4733d464a6d91ef0eaf77357c93635. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CALVP1959776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f8d669004d20ee7cabf2bf057dd902b1c5cd62aee26f36c6868bb2642f2c1e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CALVP1959770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220b8e67ad04117039b780003e228c0c31369a0dd7f60b9ca4bb94ca053f0d74. 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/TCABT1402516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc666cae3bc9dc74db5ca7939b215094277d7522f9887ac11a0aaacf0db43ad41. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/USLD91716362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3338070c38adfaa36a7fce67aceb60f1cc23af00a362214200488c14c1ef9ed5. 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/USLD91716363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca21b58a2c75430c3c3c588923c9cde070206ba7d776a53e94db6df083f53f68. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLD91716364.
Cheech & Chong (feat. Juicy J & Project Pat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb37b958c09fe40562954e0b92b85104b3b662eca6a5462493352263491681c5. 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/USLD91716368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2afa2e00f84dd57ce30124f00c7f2cb127fbe6da59aa3117cf123b245e98a78. 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/USLD91716369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf564746bb64b7ed8a24d4d362dc2a371cdafc3869457f620a6306030361cfbff. 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/USLD91716370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935985d967e6f3a431c36dafbd138171ba392ae06ee3e172a3107301711e9785. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USLD91716365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9f24286f315183c9e50d4175c4b60ab2391936526d15805b7cc768eb06d6a2. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USLD91716366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeef290397bbc775ee02d0a88cbdf3ac9cac3b63702d191a257092cb9b39a83c. 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/USLD91716371.
Shenanigans (feat. Wiz Khalifa, Jace, & Metro Boomin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5933d4f30772b8ba59a683e5a92d8bbea7acf91f86a3f1459e0c5a688cf37959. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USLD91716372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31b7c2c898982ac545942368f24c3c92469ff8e94d1fbc43383405c018035d5. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USLD91716373.
Space Danco (feat. Danny Seth, Jace, JID, & LightskinMac11)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e160ca0c0d7c4330cd76ff2f57fb9d0ca912ecdc0ea6f8df07f6a2062f6ca56. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USLD91716375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f624c79e63ad7af5ed328632d615b2eb54222972534f699e59d1a69f6c7e61e. 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/USLD91716356.
Lovin U (feat. iLoveMakonnen & Reo Cragun)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4bfebb0c32b268f2768320ef2716486dfca9488c2dd5c14fcee7318d77ffb8. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/USLD91723033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfe06ba74787aaa6d385bddc29c3b93521422f548a5c106e500b72d93484ba3. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USLD91726598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a886a1535268a1b8534482ffacb3d1b0e883c3070a5be16b30411d3c822e5a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMGR32207726.
Rolling (feat. Jace, LightskinMac11 & Ceej)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb31550f7b059cf6524bffee6d095dff9be1fa17cbc9a823a483c91ea21df93. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USLD91762452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ffff4233e419be420cc908e362104b2efbe734a54d290f98f00b80dc3ba239. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USLD91763984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4b3559f4d7d4283822936fdc748ecc43bc950e0ef79bb88915faa1b71fe68e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6MZ1539473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4b3559f4d7d4283822936fdc748ecc43bc950e0ef79bb88915faa1b71fe68e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QM6MZ1539473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd13a5d705dc0edff767bb8180f934a5aeb9a209eb0f568624a131fd0bfecf8. 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/TCACR1691265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ab88cca1ec95afaab594d74232da74a6e755192e727614a22e2572c6573f7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUYG1068898.
They Know (feat. Curtis Williams & Retro Jace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b1fb11c23cfee912ca129e50af2e3e08b8d6b8038a6b3ef7aa34ada6535a44. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USZ4V1500162.