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 0xcc9751cae13266eca7710666a8b69c6007edc2445bb202b73fcf108d647e2938. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea2d74ea-e823-4a95-bef4-49e3ed91296f.json and https://artists.proofprofile.net/proofs/artist/ea2d74ea-e823-4a95-bef4-49e3ed91296f.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 0x7acf6fea90dc399ae348b6dee8932d1a14c7eaa94752464ef6503f225ebe83b6. 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/DEZC62417231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee99de537e29b5cea40a92b9842b1d279a8713cd4a45759b2b0d463c7bbec64. 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/DEZW82200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc757235cd1fcad36dbbc317d943dce17ad3eda2aa07a57e053234d9f64c5b7a2. 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/DE1CZ2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0332f51abb42f51472034a5c77d542e4e94c0045142fd659b7bcc0ff7ad46f5. 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/DE1CZ2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582a5778834ab37bacc299f8caaf11f16e50881abe1ac5b7557b0f452ef31ce4. 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/DEUM72201208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73641f7dea9c8e4d298529e6fd05847b3b8c8a2a9d85ded5da9a215c3039bc0e. 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/DEUM72117657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe902e73704e251910e9393f61b0c04409f14c89eb9f0170b41f4f4dcb6aa091e. 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/DE1CZ2200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1257aa6cdc9ecb5bde8ba7dcf5cd0a9d2ccb71cec62324401f86680278d919. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DE1CZ2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc757235cd1fcad36dbbc317d943dce17ad3eda2aa07a57e053234d9f64c5b7a2. 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/DE1CZ2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0332f51abb42f51472034a5c77d542e4e94c0045142fd659b7bcc0ff7ad46f5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DE1CZ2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4433af1f14f26db4d32264ef2d671ae0ef770aaa55b68dac954bde05ebf6608. 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/DE1CZ2200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe902e73704e251910e9393f61b0c04409f14c89eb9f0170b41f4f4dcb6aa091e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DE1CZ2200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc757235cd1fcad36dbbc317d943dce17ad3eda2aa07a57e053234d9f64c5b7a2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DE1CZ2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b246e26959314319c1d8f584abdcfea045057e0e967e4dd3a70ca19e92e63c. 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/DE1CZ2200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1257aa6cdc9ecb5bde8ba7dcf5cd0a9d2ccb71cec62324401f86680278d919. 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/DE1CZ2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f131086ad3f5701335dda5a74932c02ab839013f8a03ba1a96aeb94d4d4b263. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DE1CZ2200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0332f51abb42f51472034a5c77d542e4e94c0045142fd659b7bcc0ff7ad46f5. 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/DE1CZ2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1257aa6cdc9ecb5bde8ba7dcf5cd0a9d2ccb71cec62324401f86680278d919. 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/DE1CZ2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc757235cd1fcad36dbbc317d943dce17ad3eda2aa07a57e053234d9f64c5b7a2. 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/DE1CZ2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0332f51abb42f51472034a5c77d542e4e94c0045142fd659b7bcc0ff7ad46f5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DE1CZ2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe489af6a244e75484743cd057fa8a9993ba95cc99610a2c06d45d80b6c635b1b. 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/DEZW82200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03649ba0123dc9300ebef113528a73bbbea81e96ee63a184e7baa5a09277c5c4. 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/DEZW82200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367175dd1235b2e2735fdbc61d5e7a5b833831d9fea10ddfe278373a7339bbeb. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:33:39Z), 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/DEZW82200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9b5f0d01f9973c27e65bf56683fd5c534b09fa857577b3408e86e40aa3e2b5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEZW82200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03666d5d0455ae1fbc48f1c65abb8df9b67c418c535a18c497e048a1b8173d9. 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/DEUM72117051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0071b0abbb400dd0a757e5b902028301d41dad4c576a500170e32110c220af8d. 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/ATUM72100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75b7ce8d90c47403fb185b9b1ed69e0b11098f22792009d16166c7c0160f1ce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DECE72006726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a157bd0057cdda132577c3fd94cf60cc5c5d96a843ccb76a5806bbb49a8a0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEWW21800233.