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 0x1b50a4c1c943456d96e7430f4e375fa137f4f9236929b4ce489a017887bef6a9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2ff04ed-15e5-4546-8226-0178e4ac3e75.json and https://artists.proofprofile.net/proofs/artist/d2ff04ed-15e5-4546-8226-0178e4ac3e75.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 0xe442eedea31f58b382bccc8b5431ec796cdd8cd1dae90539e1d0429c05cd10ea. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZ9Y21758145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af45cc480f9203179263ca665ecf5fb15295adfc08a2c3a6be14baf7415d53e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:20:37Z), 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/QZBRF1894148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9011e99af50120dd80744f3c1f769a12603826aa56b3baa3e064a28815f5e3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA61971098.
Why this War never Ends, Pt. 2 (Special Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1de7c7f80fc8fdd4a87207212df72d9cfd368f8916f2a23b19b00a9e27c38a. 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/QZHN32339072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b1283285ab213f9b268eba6c1988f292282286d51f78641f3445b6440e0ba6. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/QZTB52339748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2262fe47a426eae3e4d737450274fc180238a1dea79ac313b715a7bb3093a85e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:16:57Z), 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/QZWFL2354780.
In the House In a Heartbeat (C64 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5bd3525df0b593cda3ea3ab786a5917ca05eadd8fa748b6b463db8133651d1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:41:32Z), 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/QZNWS2446584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f3052708ff989dad69adb9085451728a795a0b7d99ac3c2fcc84e9a3770ec3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:23:14Z), 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/QZNWS2446588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7ed67438068aa2ab569747f4bd49776e0b7b6454dbbbf5919abb8dbf4cdfa6. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZPLS2418316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5c4796bcf7a71d948585e32741d6a96f3c13de8fc752efdd78ab069714ebca. 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/QZPLS2418317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0354a14913dcea2d33c04cccd744c4c5e77415ec8704c9f9eaac663f1d115215. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:52:34Z), 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/QZTAY2481860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8409d3d254cc26412fee08ab72331522e22ecb29c91b9c7fd729e05d8440feb8. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T05:02:34Z), 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/QZWFJ2459442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c46621c4b34dd5192272c8e6d6b188249d033bfac34694cba0476a5e8118ed. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:29Z), 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/QZDA52509981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8834b2a9d799138ab1a9c451f99247a5a2ceb1532f10e6afe6efabb92b4d5d80. 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/QZFZ42580789.