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 0x9b0f1320b57de083b0eb2e8a9da1f475ef44de10528116ec1afe63b2f6e004cf. 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/0678b131-e318-4bbb-a5b3-188d7a23fae7.json and https://artists.proofprofile.net/proofs/artist/0678b131-e318-4bbb-a5b3-188d7a23fae7.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 0x957621c81ffb62581661656eb1f620e5191870437451cdabc94ae6920f10d570. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH3131613168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7f08735d46f8b0de8df31f25bfeabe088169a61468bf22f8c32199d82e1f8d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDY41717628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2616325f1a3dbb64c649a0db4982f5b7fd0c3625821ba444ec14991f68b7f6f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBSMU4074504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73b5f0d601359dbbf39476a8bd847fb23f991047680c7c0af36f03b0a05e62b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLFP1848733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8003ba0724df67c8d1e9ad6006bb3b55f30dbcd66e00ad33a879e981da002552. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BXHBP1800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02972e7175fc851569dffea459ca6f6dfc98287080285383d409274cbb38c98. 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/BRRGE1805549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f919d3be231e929bef460a5248138b9c43f8dfddc193f6463393fde5574f3. 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/BXHBP1800459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994f030516dc153aed5f361ad96d6655052a39cc0cc0441a2c12a52b0b917ece. 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/DEEE72001248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8460b2547159727c13a3589f0043cebb9e69bb77e8263146ef5e9fda6f0f535e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEEE72001249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa146c5d041816d7d1ccb7154df5b34d522a69050ef4004b77dc66ccd221a5ed3. 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/DEEE72001250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d7a436a4a56c43e1e328aab2d2090cff2e63668e407a262cfba039bf6b75ec. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEEE72001251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb8384e7f2cb0c1570fe1f4adcf110f5f957f94e15b2338004bd2fb98512b5b. 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/DEEE72001247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef912974cfc26e3e479fdf5701bee22a4b5e0fa3c98c743467272abb07665e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLFP1901126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29f949d19aa234fefa9c47e2d862d0da3ca8bdf296bef7e0b06892399895ec0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLZ541900251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d498e882888220a52f85928ebacced9f669ef5a11e1f710bd2e969542842f2b. 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/BRRBU1600032.
Sometimes (feat. Woo2tech) - Shapeless Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed376c030a82b6db898259b74c6c15e3d254874ce43393f1a979d9413756fbf. 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/BRRBU1600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f9e8da828f370a1ac69be99ea82ff8f51a5ff5a89ff54ad143e2b906efd71c. 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/BRQT61400025.