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 0x77dd74f328f773597676c5a7f2080c716343306a7718490e723c45bdf90bc554. 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/945360e4-0c1b-4a79-b8d3-25b8fc4428f7.json and https://artists.proofprofile.net/proofs/artist/945360e4-0c1b-4a79-b8d3-25b8fc4428f7.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 0x0a0ccb7973ebe38807c5470b1f25c5abb8d97365ee68dff064d9090db1d3c957. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/BRA6A0400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d6c310d405afffcbb260596e46ba80121a3b3fe5495c64e215e27337ff166f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJY2043140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0380159a101300c122cee1ca11f94c35a21cf47d332c2a5d626a1e4bf8ab1f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNJY2043142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5686b93a7b2894fa2c59b46c9666c1c5fad8ba9ba5cf350d91de45c0b3dffcae. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNJY2043143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0a814321064d35fac3a94aa78a84fe4bb7fc03e010d76c121b7d0b23227af4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJY2043144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeb40bbf7ea0f360449ce309bff268e7a175b0c2c3821a2cd481359c90e89f1. 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/BRA6A1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe405a3470a9056db0ac189c3e5e4a77bcaf485a8f101498af5c4d1cdd9c4f25d. 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/BRA6A1200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a722a4152ec28711805e0b5c673023cc208ca16422f9c1861a20d36ba015a. 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/BRA6A1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c765137a48104357c9749bb57d5ad917d7f81f40dfa335eec90830458fcec7. 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/BRA6A1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd2ebb37b96e82cdc2c611cdaf2ce41275b5b961bc440d0171b6aaae01844f6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRA6A1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fadb453e042d36f4cc43125cf5bfc70ec84fb6273f895d4e616e1520afe0e9. 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/BRA6A1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14e8010f8a07f5643f2959931b9ec9f38218f25b1fa6f30cd760e2622c703bc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRA6A1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7750d579908bb929f721734c8203d990b3f4cd328418daed57a00d922fec0f3. 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/BRA6A1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c03cf282fa8420ba023a55f741a3dbf62592e68b8422a1080119d8c4e5a3ac. 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/BRA6A1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818a7127b5376e06a120d8a94088b38a1860440647a991efe249185a01603b91. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRA6A1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949fb8db0eff7ca18d48e3a0d3ee49316fb129a37b356560d5909034674fe918. 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/BRA6A1200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf981d3442f0ca8a30ea6b73fd2a1ebd4ca38b766d8de00b2c2bb6d47f7d6801f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRA6A1200012.