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 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 0xfdae6e59de44c458fdc9ac08a84a96a011b3ee3828d31f7463f2ec3c60386487. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5d9fdfc-f33d-4bde-b5fd-1fec64cc0c86.json and https://artists.proofprofile.net/proofs/artist/f5d9fdfc-f33d-4bde-b5fd-1fec64cc0c86.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 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 0x32742289509126a5442eb35e84458332029c45468576200c8205f51bac4cbccd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6K2145154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012a61233ffdddf605baa4202a4a4793b347a5d0d41a67e48598006325d94525. 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/QZMER2168844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37d87d1a71f719e27fba56f21a08329ca181e86c7451970d01d7b67e46c1901. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZNWT2183091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cc777f2dd6d4fdc56459014b14bba98a9933828524cff1933f783b3fb93f02. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZTAZ2395769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3d54c86186055f91143c6ef45bd4bd9cadb7bea99a30b2a1dba8622e7fd9ec. 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/QZTB52367195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f490f12528f18b087b672926a57ea10d144b043eb034860365a5cf7f5f50a85. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRU782301255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d938b517414739c7154bf9c6ce90b7ac56e482b273e84610e0be1979ba478e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FXR752401212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d3d536652251b8c1db9d909c0609b9d15612ab32195dab91c5f45b144c2252. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FXR752401215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554c7e64aa5e011a3226c98e2c4f26fa77156d0581736436efba976984ea43a4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFS2416606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef051baef9fe122745a2c10b5ab7217c36973ba8baba91810ef6a3a677034c57. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FXR752411605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3eac150f16ac0e86c0c0bb4d2c789fc55d9035f0985bec2dd44e57695e6093. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFF2536462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f774be8d239b2c6020ab0a0a0efb994d89306734977bd16ea3b6e346feebfe5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFF2536464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9dd135287b1bb8d764b083d165cd30d0cb58fa9ec47b26f9fca0b0989bc5c0. 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/QZWFF2536467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb608ea3b031761e781f44b3f2036fc939932daa8c7401cc5e3c12f3cba70201e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FXR752503682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0891600aae26a8b758d1c8036a2a7f83ee7ef51641f475a896437a86095912. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FXR752503685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2050758490ff45e80badbec861782b124184c4bb90983398f0545cb107c1d8ce. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FXR752503686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3cbd56c6c5209656622c739f57571bc1e440c33f680557349414f1ce3b3b08. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/FXR752503687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0875edc7bde0556a2b7d781f7fe921cc2e057607e80639c5609aa44f8c4f1ff. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FXR752503688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbaec2a9cc52f7eb6166960e74e5998f9a6d45dd161e3386eab6a6d83338b89. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FXR752503690.