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 0x9a741947509a1f82fb24700b865caa22de676cc18b671363b57fcd5d7b5f1b8c. 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/1b3a2fe4-0bcb-49cb-840c-428520d67a8a.json and https://artists.proofprofile.net/proofs/artist/1b3a2fe4-0bcb-49cb-840c-428520d67a8a.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 0xad39b0327eb62c7e78faee2dff7b86169c2c30b1b9c943622bf4af43bbbf2239. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2375523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdef84dadcedca45b9895f807708d9eb1cb8f4d96eec9696d9fbec1214d116e. 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/QMFMF2375524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf546ff9b8bd318bc0b2c3a462ea9ad481dbfd08eee613ccdefb04cd2ae8359e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2375525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc453f784a907e915ff876563f74995cd3b5500165ef18dcc6b6d51b01c8c880b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2375526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf91df93f561d6add1e01e682cf9f387a2f91e4683b7adf97d78c184607b174. 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/QMFMF2375527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f554286fbfacb6aa5fd6347d7d30fccd52f742381c85161d80a946c560ed7bc. 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/QMFMF2375528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00aa900df0cd9ecddc5d36b625e090c29ffa66c739e403debfc93f40eea6a4f2. 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/QMFMF2375529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfded7ff449c0e87055c16281134d5ba131284bed893ea97d0cefdf3e487d962f. 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/QMFMF2375530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56289f6ae77f05dba1c86e70b3bf1e60a20d3e9988a3abba5086c87c3208a5a8. 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/QMFMF2375531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e0518794305af292e077ccfb2e04a5d96f03250978412e0a451268fdc6e2ad. 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/QMFMF2375532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574994945f28afe115306f36633c312ca5e2a0db83bef6d1cfc0957200f61260. 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/QMFMF2375533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9874521f6bf5c116db5fb681b91f5cafc8a9e7144f13e24086dad2e60bb4286. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2375534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad2162941b628d09b3e0bbff95d410263e84a4897af5d530c86761064bec051. 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/QMFMF2375535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766370e0009bc8c9c3a4f4b4b337409fc13af42ccec84107bff5522d08995ed7. 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/QMFMF2375536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8772eb5ab38465d4d85be562394f7b8d0e7750a3f795f9d1e34d1a00a00215a2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92183527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f92db03d0cf033c5c368c9a6fb8d97cde8f46a3c6a18ae7e5e3292779e7e0c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMFMG2334437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30dc9c58f0dc4e08bce0c7830d1380317d56ee4c657466a8e81cb9cac517786. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USUYG1351283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79d79bca46f55d8952f1d68ac8586bda718baf71980dd3a4ebc9be30b53e98c. 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/QZHN82088698.