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 0x245d9fa1576dc6ef025e357566ec136c47f81911186ad8ee5085bd7b215796ae. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e03fa4d5-246f-43bb-ad8c-401b2fc4634f.json and https://artists.proofprofile.net/proofs/artist/e03fa4d5-246f-43bb-ad8c-401b2fc4634f.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 0xde4498545ad977a0b885608fce75d04c80c3d16c821e446491c8de410c95ef0c. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/DGA052247435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c92fa9d4bfb082211c7bbb86f25dcc5dccb84c7d9bf0ff8a8d5a94e849c054f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA052247437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bc86c0317ea3c7beb3da7f46510841bd9e9b216a0df77a9956a50fb938b20c. 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/DGA052247439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536f78a8c60766244ad2df2a1be29a53bde4abecb0a76e3ebea92f62f1fae5ab. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:58:25Z), 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/DGA052247440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9647ba6c4a4067112931198fa19b77ee4cdb9c1f83a456f6a519f8d2727de16d. 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/DGA052247441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2655bb2a7a290ee9de56203a61f8f0f24b6a2423b6eccf57bdea1ba53458db88. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA052247442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acc039754c32c487fc16903dbf0e75f79a0baffc1f18fdd97b182384756df4d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA052247443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fdd3dbbc63342ab4c99b611697a0bb55cdf5cdcd5b775eec0d023a4a006b38. 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/DGA052247444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2f05091505fc8fb404897dbb27d7195314d1acf9c251dc38b6cf27db07267c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA052247445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89141907fb0c35991567824cc67b8314709b3dc92a64cf0c345d7fff6beee34d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DGA052247447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9190ec8b6ec3534c1cbd75c2570ff6898c814a42880b78ace32b0526ea0553c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:45Z), 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/DGA052247448.