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 0x478647e558b846e4eeaed743373bbfd8c5233e9f892b6831ee52b0d0e182a923. 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/44fe1746-992e-4564-80d1-cac5cc343217.json and https://artists.proofprofile.net/proofs/artist/44fe1746-992e-4564-80d1-cac5cc343217.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 0xc1960a7a84d13a29487fbd817a8975fa3496150c613054f1a2d868299e576e41. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/KRMIM2008839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc4bddbd5c370bc1466d30283af2b297d8573f30df686729648ce136867e5d4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/KRMIM2008840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe59b215a1b20a89d2ef8cf8329d4efb195c4e4071685723b4101528d3ed88d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:21:07Z), 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/KRMIM2008843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578b7c8182b4d021658d8139595775a85e4b7042437d12dc96e651945712ae65. 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/KRB472101222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c56db15472b2dd52ab3157087462e93f866344b670f1b58eb24de6fa8eb124. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/KRB472101223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebe85c153e7c0b237af272c5cc551900a9e1befa4d299f61cc0b306dc73407a. 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/KRB472101225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6d1cea636137e3f05b8037749396fd939bdbcdf2c298aa0c2aa4d809a30be. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QM6P42203324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a28126e21f2cfcb50679a090478c21ec214ab467519a580ae1c84ff9bee715. 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/KRB472302720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda94cf45034a6463667daf3798dbe00ccf22468662e2349a8a6f516e88c07072. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:50:02Z), 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/KRF632405280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7d51e19081dda3725fe058648a5b496f4cb0f1ab91e589774479d0fd5d8fd7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:53:04Z), 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/KRB472402551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380df67e8a260115fa7d6a8b7290920ac77e5c92dcb93b54a65015539149304c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:34:28Z), 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/KRF632408149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a654fa30714cd7c164430debc9997189417193caa2b792f5c714f7b03b8c7a. 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/KRF632503373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0219268e31d559749455ed824b1fe403ee08ec4641337a6114f40ef75a39fb11. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:36:40Z), 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/KRF632503374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cef30c99fac96924edb2454c24cafdc952a198be1753b22f6445c8ae9debd12. 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/QZF452002439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc84b7a63a74b933ac5a7e23ad874f9cb892a80a4ccd9f3fadc2c5e8fbfec216. 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/KRF632302729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e05a213c7b25ddc189c9a8f6d334a0f5ac781cc4b6fddb9324c683cd0e3e492. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM6MZ2462463.
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 0xc582da048375be7c0ad35ee923a1e7ccada4553e7f1063695000eeaca129d5a2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/KRMIM2211214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083b0218b6ac4755704e311351dc4c63c87e455aa141f07da056d4f89d9d2f72. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/KRMIM2178474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68de8982a83a9482e18ed5bb43b06289cc05058dab4726271085d00badce7257. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/KSA012181724.