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 0xcda11a16201ad55273ee3eaf1ca430b2497ed7e28b04633e032c1cbc879a52ff. 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/a04fb073-c500-4a15-8560-102c5ae9eacc.json and https://artists.proofprofile.net/proofs/artist/a04fb073-c500-4a15-8560-102c5ae9eacc.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 0xc7b58ee0fa6770f65a21c95a5a889cf81deae223628ba00423f1cc075f2affe0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBEFR2309159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec34d12b297474bad50d40d2fe982dc71551e1cf64e3dfd91f2745d4f1d817e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBEFR2309126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd951bf06d78cf3b6468144d26d09e1c1181f579074c00c2507f855a88eca38. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GB6LY1601035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6b174d462a89690a49cb471fa6214fb023282b4527fa691d106885c056ff31. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB6LY1600935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6514eaf38937b9abdcb2dd70fded56df95105bda37b7919bf427ab9fdb6bff95. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB6LY1600938.
Messenger (feat. Hugo Revolon) [Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5844b2d52b6fdaab4e913b14d7589e9dae9652fa93383fd3d2b5eb0f86ea3908. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ZZOPM2110109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1718299b141863ff20685abe712cf32515ce5c5f768dd0c836a429d192131b0. 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/ZZOPM2110327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b148a383a526191dcf4c3fdf92f0d685d0ba346cf6ba0feaba7f0456554770. 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/GBEFR1908959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e5940e1bc4c7c88f1ddaeeff2adc407dfa3931654ce6cd7101a415b70df2d4. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBEFR1908954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41c72a803d81adb4eabf4a69a369b76e96647e644bc57b4be1d2afedcce3875. 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/GBEFR1908950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e2eeacc6ed84d0d9f31cef166d66b009eedae3f8deb3d3d37ab65ae91c988c. 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/GBEFR1908951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fd954b4eb23a4e9c0fdb581a223b5befc99529de42a81f0e7073e1e48a9f04. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBEFR1908941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9caf664d684d2950c8d3fc03e2e1d1d6de5e0d67572d2666c70c262c613577e. 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/GBEFR1908939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2a12ed3e26ec304b60b2f3ff842c7479813aa50e6ca06cd57493ddeb767731. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBEFR1908940.