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 0x514b53f5084668f311abd00453159d740306c2aa02cbf8ee141f101549d8f8ba. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f92c1c22-b4d9-408e-966b-febd82e7d6bd.json and https://artists.proofprofile.net/proofs/artist/f92c1c22-b4d9-408e-966b-febd82e7d6bd.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 0x0c38c24d85ccd0f442d3f2b56ee001781bf0a5575f266ba70859e3f8a11f3725. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:53Z), 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/USSH50901132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6ddac455c1213f6a98cd82d93cd5f98d4486120fac87cbb8c388c6d3217e62. 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/USSH50901133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43d77422cccd16b3e69506e90cbc28e1a9405fdede6b20fc946350468e95fbd. 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/USSH50901135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401ea2c6450ce9e381941a1d886ce21a094acd6a4a9aa203ac4d6877590957bb. 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/USSH50901138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401ea2c6450ce9e381941a1d886ce21a094acd6a4a9aa203ac4d6877590957bb. 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/USSH50901138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d250b31d1fb81efa5d73a633da96669ee8baf6a38a4f14e3c8f19ee9286066. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:54:06Z), 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/USSH50901128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0e2e7bb7fcb7db8e81ecc137c82cdfa286de1412ee23f28eb87c888670aad7. 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/USSH50901137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc0126455607c84947922ed2879a2be2e08c8d2d0541d64bb31c92c1b9a3d57. 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/USSH50901130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0cdf3db7b8b00e91bb4be66c854607c8ad3e3b83c07c4bf51edafd11f76cfb. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCACI1563419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6ddac455c1213f6a98cd82d93cd5f98d4486120fac87cbb8c388c6d3217e62. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSH50901133.