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 0x5dc46d16b5a89b7f40846a5efdd158c380a6bbb083de14db603875b49cd3516d. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cce0aefd-5faf-4a3c-8632-9ee3f7f27191.json and https://artists.proofprofile.net/proofs/artist/cce0aefd-5faf-4a3c-8632-9ee3f7f27191.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 0x962f19b1d803bedb7b1aff70cec41a5c8aa62feb7f1fc5dbfddf3caaa509a237. 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/CLKT22204254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d64416005f33581c627cb1179f7d1e35def2d3470b861a2b89fef879254a2a8. 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/CLKT22204259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fd0ed61f1e57ceedacbcf402bcf995737683ea30ff11f02cca0244ee25d4ab. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CLKT22204258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f56bb64a3235e502711377308b7c736c866d52c97d21a14fb313150eb6ba98. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/CLKT22204257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2703652f3bb9f389d8759f9c6b1391905f83e132018599245ccf1d4b95724ec. 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/CLKT22204230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6782ba300f1c36c47061650b0e8da2b02732aaa44c50ed3cd5ee10e888f5f0e. 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/CLKT22002299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ec7c1a99744975a52639ffc3f3b4ef4aeb2c6fce7332e37d1af7df86caf154. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/CLKT22002420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cebe89d933c0f2151d53dc92617954e376f92d245d9710a995542a598a2ae1. 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/CLKT22204231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22173c879a1fa60d6a88a1fd9aa462e23357295f7eab370794621daa462602da. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CLKT22204252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4627a5a8750aa46b25f83a288228901e1224c1e6de7ddcce487508e918c64a. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CLKT22204256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4971579d7b67e7888adbe1e67aa5afda0788dfdbfae05d50e8b63bd29daad7. 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/CLKT22204255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c2d5d7625fe220fbe7616759cb62826fab0d550ff09e6163ee3341ddc8262. 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/CLKT22103664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7e38fdb83907913079b9fc08f2a49c8a7f503fbf0dff5bd725ade46e519709. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CLKT21801503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2702061f7a9d6c8f54de09e91a64bf7fc14fe5d18ea2b1827177463b8f54d0. 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/CLKT21801574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb890fb7cd47a198e9c5f3e123192bdb40d055c6945f52d268ed3c2ddfdfbc79b. 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/CLKT21901716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736837e972f63d23b6f2b40b09b3f0699c049139d7f41ef1e122728f48aca218. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CLKT22002321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc337834117f8b90eb8103b51777ca00247c435ee56904ae3c83f662d4d5198. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CLKT22002323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8abde8b237d4ca4b47e4a69404b4f5ebead768f32c00e5157ab16964da2c1c. 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/CLKT21901664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e90efbe564826acaab033000db639cfdc82ce3c93d8e70e880769bc24f8c56e. 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/CLKT21901835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7b11707beab495149cc786692b65f0a3007dc2dfa5d29ed736122d4f9a3f3c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ES71G2246582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a634c972c4a1bbfa7d5c9591365feabdfaade1493f8e146e430a4d6a638508. 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/ES71G2305380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f39a5611e6e8ed53e24adac5edd55314a90032abd3a4144bdca372477d1921c. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ES71G2305381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fa0ab4c3109eff5dd43b3e707c9233dc41f1559f7f2a2b5b7c183a71fcc540. 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/ES71G2305382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9b164bd3234d5088a1038f35e42bda99728822fce1c2d2e4b1178492fc5a1a. 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/ARIXB2201047.
El Canto de Todas, Vol. IV: Concurso Scottie Scott
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc11adc27c49d63ea40a20ce26fb99b5379f014823a0ad2a2400fbfbd4cff35a. 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/CLKT22204313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad7cb13eb7b89909c689eaebdaf579c8522750748243b4be2c531fcced11dbf. 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/CLKT21901787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f757f30d1627189b3344fa3cf4fcdbce28d0652e70fa5ccd299d3cb3b5b6fd9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES71G2317148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21d4a04480adfdbc2c079ecb56a59e1c2d5c3e3fc99931a627a15979f5e71c5. 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/ES71G2317827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c2d5d7625fe220fbe7616759cb62826fab0d550ff09e6163ee3341ddc8262. 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/CLKT22103664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e4416195a393bc924330b6c76f5284bec12438551c2514a3524d3787174d1e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMBZ92596282.