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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1f1615ca4c642d0c999ef8ccb1eb7c61fd609714a51df6575bc71a3fe2f1fa. 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/f813fd29-7d7b-4344-9d96-3df9e556826c.json and https://artists.proofprofile.net/proofs/artist/f813fd29-7d7b-4344-9d96-3df9e556826c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9ec68da1eef3a4f28b2e1b9d6252d2888557e06fff6a9e9838521f12491d1a. 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/QZTB82238505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f13a8dce4098e38c0088292da2b4dcda349e961d103f0431d82548107370435. 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/QZMEN2119839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bccc87bd89e87390105be2ba927a10791f37c5a3e9790cd3125cf56a0c1e1c. 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/TCACP1669937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402fc65c3a4c8a2ec754b5f2b568856f73419c1807fba4daafe52856af889e1b. 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/TCACP1669976.
Its Ya Birthday (feat. Cascio, DJ Frosty & Chad B)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903a8c1dfc0f37605b08091cbe56c8be5abe3a70b85bfbc4158ea438f664a620. 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/TCACP1670286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b384edede5089d05dad4eb27c3ecad6426058326064b19ea66cf6240e28875. 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/TCACR1693885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830859c30f2b31e3acc3d66ca4956e897094fc33304017185dc6e29ba1b03d67. 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/TCACP1669919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f67cdb077ce3e4f2df8008d5ae6bb35bf88151493d4047a19aecd69d99db314. 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/QZPLS2244074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22609ff92e4726281250e7c9174dd7d1e6a15f751e69eaf0494d6c443786250d. 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/QZNWW2221987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c34ea63886653842471dd80661385ec75b2b67eaf307237d30c7b3ba5ea25fb. 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/QZES62285649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0e86b53d6d0fc7c85280e8f95731061e9f47576548161c0f50ab86ae20e46. 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/QZES91900285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ce50250284849932ad71f7a663c316e961fcb005ee452f9113bebce98e2ba7. 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/QZES91915726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d82033d4f5abbd8acb405831cafaa0b7c5d651a540cc1b58c8a1cdfe5f7d18. 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/GBKPL1821090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707cfcc33ee8bb6bd6b2909fcea5a8b06567954528d77d15816d4d27d40c8354. 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/USHM81810239.