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 0xfed71d8bacd4404614be9373074f3f7317cc2b8ce03bba0bb9e583e038214faf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a92766e7-24fe-4587-aab8-fde6572058ab.json and https://artists.proofprofile.net/proofs/artist/a92766e7-24fe-4587-aab8-fde6572058ab.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 0x6ae4f17ecf3900a64c6b6b5e363a19dd0fe0a8170199346dc42f4f697a863e96. 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/ARBG61900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe161ea0b091687a7df43c9de94b5630dd581e9901c9699b5df6677643921cbe0. 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/ES71G2229997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d998173b98d7a1f02d8dfe9332fcdb4b1652ebb5fead802993410c7902d487. 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/US7VG2228727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad91581ac7ff7749d840f07b0f9838af25f4345512ffeefa499be1b78f55e3cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:11:07Z), 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/QZTPX2187569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5369bb503652f8701f0f71f069b75e5d730a8778fca74f1eeac93b891a6d6a61. 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/QZMZ92108730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2e078b66eb398b53870e5530843febd88efc9b19d58fd66f36874596b8b86e. 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/US7VG2228825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ba7cbe263f8b0272cde16d0ca783fb0111767d7386ee52d33b53e5a527c52b. 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/US7VG2228826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ec6be77e64524e19ccc795653be19d751b3a3c033ff1b6034be8aea623f184. 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/US7VG2228827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d998173b98d7a1f02d8dfe9332fcdb4b1652ebb5fead802993410c7902d487. 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/US7VG2228727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93d41645405b10f6c7219a27d70a11727866369071925c40d01f01b34020014. 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/US7VG2228828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af147874e9f6b0804c75381d789372c1c1bf89cda114979ec7f413fa2039038. 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/US7VG2228829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5369bb503652f8701f0f71f069b75e5d730a8778fca74f1eeac93b891a6d6a61. 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/QZMZ92108730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6af403272f7342f821fbe84d7df7966e2a5d33ef52c7b1b96e341e3fc51e11b. 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/QZ5AB2124282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b11f196acdb5395cd986cf54b68307d63526e6896caec19793ae2660eb3b422. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNJY2004366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb92836256defb1fb5e7c7eb9f644befc2d5b2c17ab48cb757fd66841b714a1. 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/QZNJX2007011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98646d9e57218b95c523fc7ba885828e9e53c40da5e05478fe43a11aa4e3b46f. 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/QZNJW2008106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda18f033343c15520e822dd1a086b5d6132b175cab69550e5c2989f668379a4. 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/QZNJW2465929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777c09a53f6592dddfd26f3fc67f62edfed070749ed62bdf411119853a12999d. 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/ESA011810078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce11e21785681569b7554e023d8c469665db1284d675ebd7be3c85c9b017185f. 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/ES6081641102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf83a25f234223e82a2b2be61dd6710f6c7d8643729a651cef564ae9513547c. 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/ESA011634930.