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 0x7af2bc18bf0f1f6470c609af974347fdd54fc8b75d868587091a07036ecb7a81. 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/e0c2557f-17cf-4403-8054-3c89e67e23fa.json and https://artists.proofprofile.net/proofs/artist/e0c2557f-17cf-4403-8054-3c89e67e23fa.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 0xad7377bb929e5afc13efcca0566b924a452c939ea1da5509eeef9b2cb1089369. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/US3DF2044704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6334d34b5a8d1990941a99db103db516b483107c6feb8f62a21e102e58cec830. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USANG2188616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d13c24ad41389e5ac4b3d301b1b5d6c26736891643804e3cd480f55e85210c9. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QM3DF2146668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a18168a417dcc5ba4492c9a528b0e61c88ab191152b9434504761c8f221f93e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2146762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2129afbdfb8f1eba700e17e085541ac126de639803b600a5f6a52ffb6caa665. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2146763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8361c839a444463f37c3c4e34dc43a21c7d474b50b2decaaf56364f1df90b0d2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2146765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b32a463145d729473e30265beca1ef910f4bf189378b6d522efe1d2b7e635f4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2146766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba927b5d2f849b707b705f90185a92966c6b17ac1206e3ce0e56a02087e0acba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2146768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73d0c7cd9d2a00f47a13b2405ca24a9aeb9e56c02ec6bf508e950258ac5d185. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US3DF2258308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664d31da493ba20af9a7010c6f599c25b2e61cbee03d4e0c24df935142827305. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/US3DF2258302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987a9b258cea0606822fa5084a76e5baf62d12a8ff43c9da839c6e0905b9b471. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:47Z), 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/US3DF2258300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bb76337cf9f67ba03c3d66a9527eb53ec77aa1860639ea1e6c11a637997df3. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/US3DF2258304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b353624ae01c9fc22520b800851ebeb22e52a45a39a7836b1595f153280abda. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:05:58Z), 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/US3DF2258297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fc7c125becbd604815c3893adf6f748bc9ea6996a08ac60007d1faa4e3db95. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:34:49Z), 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/US3DF2258303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a1a04ab6d1c60a5805dc59bbc726f4f5e33c7c68a35c200206e0a09520e250. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/UKZGC2500854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b64a799c4b6626083ae2c59baef56cbdabb0fd1c53440f8b5ee7a194c4d903. 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/USANG2103265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4e349bb15cc85fd0ca5c0e6aeda06aced8041ff973204031cdd6a7151c1fa8. 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/GBLV62100866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e987f61a36265788a61f1c173e91724e12cae4a12ffbd1e600d9749008f967. 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/GBLV62100873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74a9747ace0c2a132f2654d7236811a7b75aff8c9365f1819c37d786abae330. 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/QM3DF2138552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327bf7aecdc61a06f4d6297def278d03dfa15d89dbbdf10767d6b4fc1c62388e. 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/US3DF2178075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdc9344c8b9ef31995acdac3890c25d1f321dea5da67acc892e68a389d51c24. 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/FRU012100318.
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 0x480ad6f22176c788ee67cda0646851b4efb3970bfde98ca04bf972f070ea4d75. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRU012100315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee68e71211b143717b272f2a15b5759dca040c9a67063da20ae26d29d746f18. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM3DF2166595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158c8dbc74923b1f507188ce4378356be4df6170b7fded0bb0e495cc1b4aa128. 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/QM3DF2138550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919dec0dce4b982117bb6bb885dfed72056a7f5968febe1cc54cb21bd4c1d415. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/UKZGC2203762.