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 0x30c9ce4229efe4f8d2791c18a3b0b65da6a897bd99c423c552fdb0e29b4bf3fd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/699cfb9d-92a6-4323-a345-198e971acb88.json and https://artists.proofprofile.net/proofs/artist/699cfb9d-92a6-4323-a345-198e971acb88.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 0x256f592e258e77b55ea6c3ede4074bbf1f361d0666d438891e3073c99cfd6a4d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM4TW1945505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c0b07cb7fd49847d4c33becb36bf6005c0039a28e3a696b7fc9cbd66fed388. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:40:58Z), 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/QM6MZ1967438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2350c05e8feac951fae9a5b047cfaf8fa049a3952d655ae6964b04ce5d386107. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMFMF2016855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0033660e1e627773af676bc2cdab2c595cbd21ccf909af952cae16647bf589c9. 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/QMFMF2016856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2791f3f99cc8544584715b24dcfa3edee44e73e0ea0b6dcfb1850ae0e73c9a61. 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/FRX282409314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dd11f41959660bfeb2bff0151d457f73e9ceabde77612cdf2daeb2231d7c61. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:29:45Z), 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/FRX872464554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895778243880388f31033f1cc275caecf81f900999615f001ff024e1b53b68d5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR2X42526870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d46767d14cecfaade95823d4fcac41cb02f082a7b98d0a6506ed11e3f10bb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR2X42549750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1952a30b7209515d07dfe50ad5d92576ca04f4f3cac8856642fecbfca0ac664. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX452569242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f7beadf217de438ef2c3bed20ead72d91ad6cdb52a235eb6f508d6e5d8c3fb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX872503812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19250b199adfec780caf6e85d2b5354b49ae23d9f355f2cfa85366ad2dab2709. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:27:28Z), 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/DGA052560222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4109cd64262c7298ff1092548a5bedb866ccf17bbc7fd6236a7c6adf2062860. 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/DGA062506880.