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 0xcc6c249af4d7cf8ad7607866c6309b49e2e4bef5d535fc1a98250a1705cfabb5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33fdd157-fd44-4af4-bbb8-7031009c0f4a.json and https://artists.proofprofile.net/proofs/artist/33fdd157-fd44-4af4-bbb8-7031009c0f4a.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 0x8b651d4dac128b2c1a0ebb7d18dc263dcee71bf48ee67f1cf77157425b52dc80. 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/DED830274103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e482c303d94cf9915a576cd9a5ffe97b429930933668bd4abd4c93a76eb64. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DED830274107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109d5d3652fd677e848b66bb55a93d8cdbca8269b9ef6fcbcc8ccbaebd86a830. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DED830274110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500a07bf3dc2e669df389dd942e7c9966e03de8f7afbacdc1aa376d39f45d179. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:38:48Z), 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/DED830370102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98849846ce19c353f9bb1f905efb129fcc5f6ad919efd4237076b49328f8386e. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:21:46Z), 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/DED830370105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf4029c751e7340f4f73a58599c719929082e8c7232a14b66c06e3b7da9131. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/DED830583504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfac31d868941169d2be79e0daa25def08dcf1abf7813f64ab3a4df981cc335. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DED830583506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2529f4bf3fb124a2faa0f04473c992651c2b628414eb358682a2e9ffdbc84d0f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DED830696502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3efcfea48964e75953099660c7927ba731ac7a0c7f72500e7e0c491f9c1011. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:56:10Z), 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/DED830696504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fa9bb59dec0e420b7c708cba97cde24eb7869c385bafd461727cb50b85d0da. 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/DEU601606159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c607401c2cfb4c3490e2778a7cbb5d5a33b022d9ff5ccfb7158e5bde470bd1. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEU601606160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ca161a6dd0c34ad498d94bbf0a48b92812197f7c09e38065b8fc9d4978ee17. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/FI5ST1600019.