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 0xeb44348ec63c05ea110353dab90e703bc8f1a16bd00ca95f46438ee047fc28a4. 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/4c227655-60a8-4c7b-82c0-d0391dba872e.json and https://artists.proofprofile.net/proofs/artist/4c227655-60a8-4c7b-82c0-d0391dba872e.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 0xa5966348323963dbc00758367291f12a6e17e5d6116d48f04d277a26c8c0b680. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6Q2090640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f13be2aa615a1c6d0fabe9e17cb9d67fdde36014654f7025f4eddc4a3ea22a3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6Q2090642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52119467cb8803c70f8e51726fe46c0a0a81aefdf969f0deea00a7c5d9ac8e1e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6J2195958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0466680fbbc0b1df6b86190f4ba4fc14be19e2e8d950abde7e60d2b8f1653d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZK6J2195959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaf249eaa94d99119b485343150d5101e8c2728777ef02d2c66fe50273dd630. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZK6Q2137553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011ce45ebb6ca9db6429c40b31240037391c7a2b99fffb8ab4a55529dbc652b0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:44:51Z), 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/QZK6J2195960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506885cd84b82d8c3372990bd833c9594e6ce9fc6d4019bdc7ef1b72635c90d8. 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/QZK6J2195964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bed1a55c2ea87fd6ce2edb9d6d32046d346373efc4281e3f6bbb334bc26c18. 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/QZTAT2233622.
Unplugged: Šv. Mikalojaus Stebukladario cerkvė
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b092aa7cc496b6dd04a8ad2c71ee6d27cb0f4d10836530d4655a6e3239b21d0. 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/QZWFL2305570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239b0e84a99160d187cb393e105f2571801294ef94ed7408964879eb14f04373. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZWFL2305571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf060bf7c12cbaeaae7dc1840b78b611b4efc7cee514fd132a2c130c14a2b7d60. 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/QZWFH2305213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5b7df058fb9668c1468924f98c3cb42344519bfb97636bd678217ff33a8cad. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFL2305573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9522c91298f818116ed858210e07b4ae181397211821dc85f0bd7a088a397c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFL2305574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd887f954171d6e4cde1ccfb97918741f23aa8ffe01289eea3bab15837756b089. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:44:54Z), 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/QZWFL2305575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449b97b7d63bfdcd4a57855cc7fdc42b45e82b675accbd06a4ff45e53c847e56. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFL2305576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be2c8f6c83a1a3afbd71bd1161f2449f59da93446e0eb7a94c021116210e333. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2424404.