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 0x8512256ae4dc80b20514b54e0550bbd92f14d856eac50acda074fa1cf7ceb9f4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77024499-9e9e-44da-a1a8-38cf86f7ea87.json and https://artists.proofprofile.net/proofs/artist/77024499-9e9e-44da-a1a8-38cf86f7ea87.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Eritrean African Tigrigna Watta and Krar Songs
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 0x337822388c1a5c21c65533021b77ededa238240f3c61cbe98444a4fb032b7f28. 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/TCADN1824497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81546caf3692b4c75b15b9ec2eea6a137dd7fe45cbb18a5a202abfa2d6b83848. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:08:50Z), 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/TCADN1824499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15cc378b2afdbd6108fdb9c4b082b73283b09215e481b6183ca98659cf6508f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCADN1824502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003513dbe9854eab8e1b2c9a14a6a9595227123874fdab4e6240354426708f38. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:19Z), 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/TCADN1824503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7a7f5e32b596ba1b1e5b3c6ab227c98c5214954da23f11f79a98d547da8932. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCADN1824504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b502e61ff93630b0b7aa7ff36838c8f6f2599d8c02ebb750046f541f38071f2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCADN1824507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaccd5326fdf49f83f98ec97d8a47d78eba8a0d265ed82c4a73ddae2171d602. 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/TCADN1824515.