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 0xf03c9300ec61e5bf004d150477a87588c4988a2c7b4280b7aa49b1cb5c34ad9b. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eee31a47-6ad0-489e-b8a3-659438d9bd50.json and https://artists.proofprofile.net/proofs/artist/eee31a47-6ad0-489e-b8a3-659438d9bd50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Músicas Infantis Vol.1.: Lingokids em Português
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 0x35ea7387a12cca100bab00090c6d83c4347748c8ab21b429eee188bead8b7b86. 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/QZTB22423956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179ef5718370fd524f2768fa7b2ff3d83ed914e8dc38747505d1224457d5bab5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:00:37Z), 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/QZTB22423957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbac8d2f30616a49d2874a42beb525475995036bcdac537cb747e58c980d474d. 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/QZTB22423958.
Músicas Infantis Vol.2.: Lingokids em Português
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e73ed4cff0f7d0808805f58c0635ad4f069108208cebe1498ede6288fcdaff. 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/QZWFL2455613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555a003e7d812c9c9ba231e17e4974417b3ae1f320609c741843af7411b6200f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFL2455614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68701e9dbe2bf68acb8f90e6bcd1c0cb8649b2698453f694f2135f2ce5342131. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFL2455615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17fcaa70654bc2a7886fc68324eddb5ab7bb3244102d5bf7957b8d93a79bcb7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFL2455616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0e6ebd9bb4c4b89d31126bba86fdd35aaf8cdc69277c67647751305cde48c5. 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/QZHN72544139.
Músicas Infantis Vol.3.: Lingokids em Português