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 0x38a3a6f196a5de40b2ec991c164bc1936eae4558ddad72dab63ed80ce86e78bb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44396cde-695e-4f7c-a0a7-a669f687c8b8.json and https://artists.proofprofile.net/proofs/artist/44396cde-695e-4f7c-a0a7-a669f687c8b8.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 0xadcc711d4cd819605993b94a96548eb9319db40f5a48be22c9f637ee73b0a24a. 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/ES71G2426948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71c60920a23c98ea982d1dfe57471798460114f24a8718a94c67c42a516a746. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:58:51Z), 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/QM6P42584399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31090799ee9d491cdf795418bc3a1f7e87bd04f578fa6a27d0aa1c96c8a78844. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USANG2535981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9b0d6d4d2e53cb864d91ecc14087b8d4a5cb6cd0afdc81eef6c89428bdaed4. 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/ES71G2329486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aedfde9774b788e23e7d4bededa401af872ca53fcf6d1a8edc0e0d4c4cfe173. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2325888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1e17ff4f2a5d4c334af9c51e387ccc3b47b941d32b25f38a5a4739cfd25b60. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2321086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5392325114282c3d954159acfcee45b34dbaeddc6dbbd2dbedc7bfc0284a686e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2044069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5412b966e6f8c02f60c73c55d8c78ccb0725555b749a867e390e3ba88281e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2017958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f471c3932e8831aa5d0e5ec3da2ab24ed111af1f68e7befcc572b0bc7bc3cc5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2005973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679ce393fa70ad41c306f8b9e00cf5528793bc9a6b7ea1d013cb4eea437f4bbe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAED1925749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cbdb3c08410fd482ec3678868df59e9e95a48c831d6fdc5e854dbba2fa4d9b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEB1905568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879b2b2d11e6aaa91466d529dd3eec059ff0ad9aed14cac116aa0d62f980be3e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADX1897275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588d20652f9d6dc349b25939e9f41e23772b884520116dcde71b7938c9406c25. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ1894602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf153bf8e3d7e8b9fd982e08a5d17a420b92175feec1ed577559fc18da54c2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADG1717216.