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 0xfc563984d9a24e08def05a972213575c26a5138b2e6387a2dc18bb924c48e429. 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/759f639d-e637-4993-82ba-ab86b3d5c703.json and https://artists.proofprofile.net/proofs/artist/759f639d-e637-4993-82ba-ab86b3d5c703.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 0x20a4045b605d8e0d9d24ef12313e57ca60c0d10e6e80ac56b66a49eefb359be6. 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/USUM71402544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd9964d30f182b6b642328bae19a2ccf1edc689447950aa612a8a3217e56283. 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/USUM71402545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1b8d9592f430af68906752046180d0b9591ed04c8239fed8f21e6522892743. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USAM17100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98fd4f31ba541f5109e0ef346d3d6fd9b756a2ddefa3160393bf2fbf5663b95. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/USUM71308844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bbbf370df2345d7c1539f8d736770769346a853f99f9d4de29ea75c484dea0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USUM71308845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99b722898cd98ee1d48aea6572b5fcd74032d695e2e331d18f13ce29fe9d3da. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T11:55:35Z), 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/USUM71308846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad14140e416d638fed7d76c8930a1a3ca29615c7fb4d72a8767d88e5123846f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USEE10500422.
Sergio Mendes & Brasil '77 Live in Japan
Promise Of A Fisherman (Promessa De Pescador)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3f2e9363551886113f782e626f19d28d95696df29bc86bf1c87b13d7848376. 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/USUM70844232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b13ec6306282e5d694d1583b3e2b954232156ca56c74e5fa9f0033d08eb2005. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USAM17200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3f2e9363551886113f782e626f19d28d95696df29bc86bf1c87b13d7848376. 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/USUM70844232.