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 0x52570492e99a45973d40f70c1c2374a8f9a80827c46468611992a99d4ed2273c. 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/6f493b7d-5f9c-4c1f-a5fd-0b863bbd43b5.json and https://artists.proofprofile.net/proofs/artist/6f493b7d-5f9c-4c1f-a5fd-0b863bbd43b5.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 0x215858910f17059062dfc65eb12b0fc850919dc737c8321154196b33153d626a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEND51210014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd53f6e4a04d8f0dff4627c42a4381d175de52deec2659f2c21569441e8a912. 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/DEND51210006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca21c10745e80c06945b73dc20c21ba5e8e0a1e038fa84b68a6e32b47f74263. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEND51210015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca5bd4190c0c38a7c81a09002e7a4c52bdb8915593d6073f7919d5fa6d8fc73. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEND51210016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc7afe7153127c3f1f733424106d5170248898f8499e99d5ff05ae530b4dc6a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEND51210138.
Winter Wonderland (Smooth Jazz Christmas Version)
How Deep Is Your Love - Smooth Jazz Version Classic Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77e78fc6da48c5acb93ce8f3b2eedbe14fc543c9442b82731316ffdc9804389. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEND51210092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b3602d49e151042c0ea737235fdb68c90f0986ebbc322923353bf7d6ce1fdb. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/DEND51210091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddcbfc304060c7d97914ba1fedee51f62adcf66883b1bb68ab3e828b0397dd7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEND51210097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24603f131c29cd90124de8f426e69eeeb290bc2001cec08c34bd1d6e5e2b8ca3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEND51210100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a36cd5cca86630652c1f8ebdbeebea30e8e50800665e0855d4210b5b5cc6f7. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/DEND51210095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f70ca482f707e02e76bfdb80c403368664e94508a49430ee1bf03b567f9320. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEND51210259.
Phils Freunde auf geheimnisvollen Tonspuren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae64ed1cd5c9805f88acede0bedc6d9630120be3ce134ccb79b5313ff2d5fb85. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEND51220009.
First (Special Edition Two Tracks Extra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb025541d5e5b326b5b8b838d3f1cc73117eafe2540b7327a5b8745224767ab3. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DEND51200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f02a4d59296b26153d677b73bac9226a9906975a9c3ed80bedd28775657c89. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DEND51200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a83eeefbc199d6dbcb596f8104a33c9581a144bfe85570d1cb47ec6fca8bae. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEND51200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dabcc99ce6da17d48d9d0e8449d5e34d0a1f22411cd76dfc701df581a76543. 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/DEND51200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa6bb3f0cb76238bcaa6e30cf507c4540e69e658643aacfbb6f8afa5bec44a4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEND51200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766a23a52ef7868236dd46173f390ddc902bf4ccd4af277096564daa591dc88f. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/DEND51200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ec653d1ccfdf9d48916944bc07e25b4f1ea239fd32ca1d3cdb4486589dad20. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEND51210068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1070c080042a386dd74d09752f51625ac0422b7921fb15675ba4fc6e3c60518f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEND51210060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174e296b816dc8b70bb7a15c8c8910539ace84c01b27197138e3c195d8ad6b6e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DEND51240023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32072ca6660ce5a232073b3fa2b3a9f3d35813cb6298ce2ace481c4deaba902. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEND51250008.