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 0x4bbc63f3ecfce186350dc1413fac3f06adf78894a94f9714d26afde29baffe16. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4885adb-0b26-485c-8ad3-af0638b7d8f7.json and https://artists.proofprofile.net/proofs/artist/c4885adb-0b26-485c-8ad3-af0638b7d8f7.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 0xc89add0a953987b3ab7d15cf367757bfbc2acb4dde39d0876800c7a8dbe64113. 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/NL8FZ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e272c5f4f681825d35d81022e6cbb7b2acbe6eab5ec02b2144c2bac37a6d8e. 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/NL8FZ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14892e481eba94e469bc00704c3e7341aeafd3ef31944af7554cdefc8be4741c. 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/NL8FZ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dbd292c36133c980a32e75ebe914c8a2f88102ca4e26c1a6f8631e2d57f843. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL8FZ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885b270ebff89fbd6aa2bbe5c783f9907f41d6da2e5213db6eff23bcaf0d45e1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NL8FZ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeeb31ad18bb13ff050218700a8a7858420a7d733f47c5f984611e16aa5894b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:26Z), 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/NL8FZ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41548ed2f2a9dddcfb890f94fa8d29db9f1969103e2258fe518afe2b52df666d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/NL8FZ2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da54d1e2329787b907437450818b87eb7121538cbce5ff8e21d16f475f6fee9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NL8FZ2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89add0a953987b3ab7d15cf367757bfbc2acb4dde39d0876800c7a8dbe64113. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL8FZ2300002.
Instrumental Indie-Folk, Vol. 3 (Alexrainbirdmusic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f6cc45d2665ec6e55673cda925cb657f2e026312d30ccc52022f961d3cda98. 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/NL8FZ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec2ebff4e15246e4bf742f301fde12cd48025eb1c5bad88d479ab153e2c9ffd. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NL8FZ2400001.