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 0x57447fd7f7386b470ec760c6b9b1366abf41190add2f880f850a66f4b7e1c422. 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/819f71f0-ff04-4136-901a-9b555b5a280b.json and https://artists.proofprofile.net/proofs/artist/819f71f0-ff04-4136-901a-9b555b5a280b.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 0xd3066300c07bf41a4c40d071a289c7d0d649a2726ed85e47a0a8ee32e5f397e6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:08Z), 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/UST8K1671788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b5f49455cb6e7fdf375d0a921a71df1a65c601b9da35e37ef7171809381188. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UST8K1671789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b03f0a9db95b5c50f5969400c65ea550fd6c287c1839dfe26ca8f82f8205c1e. 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/UST8K1671790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee7abaa958cb723f8b5ef33b8a27de18ae19740d58bd277cbae12019bf4e4aa. 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/UST8K1671791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983d56f8c60deea95558d4c3735f31d8eebe0152322f19394df64163311df104. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:38:53Z), 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/UST8K1671792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0993c96ca1c5d73573ad6b6fbf7e4b17d9abd486f4975a8e30919fe4a0c03b1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UST8K1671793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd467fc4f84c1a80936468d2f5be75c900c59635a0603c016659282839efd49b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/UST8K1671795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d7ff725ddf412616b887bcd70dd8ed102106bf91338b1ef1b82bba382c56f1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWX2099091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebe5baec92a66ea511439eac921f8180bce97a4041f321f9b62813fd2d6f412. 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/QZNWZ2255198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e67a45e505c1ab921926e1dff6d97d53ef9ad741ec09c6953742322411026f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWZ2255199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889ea920e9302438c7ead28e120801396e9142f2316f90485f6e1292a0653648. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:37:59Z), 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/QZNWZ2255200.