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 0x28ff8afa0dbff2f2919c27eceb87aa316c4748b4647a0f13bb486a27f422bff6. 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/53c3bc6a-4417-4023-bfd5-35790eaf0121.json and https://artists.proofprofile.net/proofs/artist/53c3bc6a-4417-4023-bfd5-35790eaf0121.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 0x6446324f1a1cdf9c49cb681faf8d9061eb2f62c44f009a0c4c425e64c020632e. 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/QZNWZ2116150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9315674451e97b1eccd73b154c73d94f0eaa97f54ebc11474826d2f976741c63. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZTAT2156828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90504507230aca8e2c6f7d3c5d96a5191dcd1a0287e457f31729d6c9992ab3b. 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/QZFZ42288051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805bd82b58e90aa55b22535ff0c11a65d0152b69827dc9411cf0f0fe7b46503d. 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/GBLPF6715468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df66ab86116ce700ef9606bc87b6594eb5b1ea47b3e7da05e19b5bd79f935b8. 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/GBLPF6717526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde43d74adf843b5a3369fe917418b56f3ba739e207d64ac0678b6ee687c22a36. 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/QZK6J2293410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77da27493c67fb20887edca6a399ba3e77e6a955440a5df562fba847cc95a39. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBLPF6726969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44907ab83401d8ee8e2e010be678c220d9ca2390e05003383fea457f4439479f. 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/GBLPF6732732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8924ea5534eabc4d20fb54372c4e3a25ca82a5e9e9710176f65be7bb2d67f8eb. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBLPF6754727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85827c77b10b429c1e9df8fd468237def6bf0c64dd7c604dfc6338327a6ae11d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBLPF6756747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4482c5c161c7e7085f045b814a0ba8b5b8ab2e3bde285be1919ec8e9479c551. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBLPF6777602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc568a10069f694adbaa660096cd499576b281018bf595837777f54a040c3bc3e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLPF6785095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76337771f7bd8297f47aa54ea922751d0767b064ec59bcf6f4d42011a930b5c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLPF6786696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff26d6c6d44cb5ba16c52d01aa8e16a8299731c7b8ba8e2ad31c4828ef53771f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QMDA62467284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79cdaa9fa40e718ce5213f7190ef953e5ce7a5e79917b5f264f3bd9b8431324. 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/QMDA62467285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9515aacdc2fc4dc3c546ec283c21ca59ec659d034b6354f54830464e565d0968. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QMDA62467286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62da6255d72581433a307f950286e3f9d10557e39e668a4bbea9b548e4d4a954. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QMDA72459901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e74703a288920a77d1544cb29cae13586c1f33f8699d3b744cd1d8d1081148. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QMFMF2467693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2697dc6c5c7a24543bd5bb87e2ae4cb814795dfe79c253951057e10c083169. 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/QM4TX2505091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58673653d17fed443acc2976aa9b5be3ac60d5764762454b247c1d43c2d73e1b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QM6N22549319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761e555a5ee7f1b4b4ad2e1521d74e57d1a1b5aaba609cd5c4fcb783081fe527. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMFME2502427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9973af004a77d5aaeaaed26446d73aeedc2b520835deaed37b05882580e4d606. 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/QMFME2555879.