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 0x879330867c6da406b5b787b2cc36625ba88af736508d3c0a9771f74a6f0e4726. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4903235-ba30-458d-a412-c082938808ff.json and https://artists.proofprofile.net/proofs/artist/a4903235-ba30-458d-a412-c082938808ff.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 0x629adaf6a984755a3f093cee5ec25a1e9975644da8211f5500a2bd31f4fd30d9. 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/GBKQU2313141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02ef81116953f8f76346894784e8c6797285a3cbd36723f2b076c96b3d22f0c. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FR3KP2403400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0854066745fe61227156c209dffe0a9deaa45288421ae81e3969c220d648ded8. 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/FR3KP2403410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acfe3f61145c393b43ea427049923bf659872033f389f92b62b9319ae5bb990. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR3KP2403430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80350c29ec70e6c21fa56e9233679613474011b0017f78bcfd49e5d68a61c153. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR3KP2403440.
So Delicious (Melodic House & Techno) [DJ Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0113154cb2aa9d3f06d218b0257bdaae82b0c9b977a724b0de63936e6e6cd0. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/US83Z2339769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ada1fa8f2cac557596d692ba0fe79a2c157dacc9492139e66af49a10fb65956. 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/QZTB92407490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99eb7bbb2796f429a4a1c43d4ebead9d8824e4ae273696f822997b5ebb88511b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR3KP2403330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cd13a1bc255aa754c3eee580a5520dc328080dad4a90c384e356f8ef0aacec. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR3KP2403300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0d9caec89ea312a3c9d46a30ca3d81e6bf35d0f926a05afbdccb3acf3ef1bf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR3KP2403320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92598ca2f83229cfbc18b28b509ae53cb9af8c5623740512f9906cdf050e467a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR3KP2403280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7963ef248c7144907f511d4dd7dfd3c5d99682781c700eac17d37e6f4d8a9e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR3KP2403290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2655f2954bc1cf0ef5919d2ba748b4acf2356518f79a86c7bdf0fb77244cc4c6. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR3KP2403240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de36e76ddb645ee204eef6a12f3f2231d471a835da139db9f8ee31eaefb0ef0. 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/US83Z2458823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ad17d4fb05ec7629496c32cd1fb8c9c2e17c005c54f6ef4647893e6c13606. 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/DENF32300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c951a2caac3a630afd2bb101933dbd8aaafba59f931928e2ecca088df2be229. 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/DENF32300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747e691239bf99f937a6751220a33da09c7797d9f93743184ebf29c8ba304079. 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/US83Z2334961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cb564e284bb16c804285a250dfadb3f9e0b867e939cfe79bf02ec438713221. 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/US83Z2334962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe364a28f351da78d1e47cf342e4f44bb6db55b9fbf1215b3f0dc0fa425d15f. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/GBKQU2311263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea24583066592894281c27e78b99b0afac62f9694e8a8052f3382a51cf514b9. 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/GBKQU2313140.