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 0x168508a4150afc5afe93f3c6bc8725cdc337e96d981785e32623f38c714dcdf5. 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/8c60146b-cdc6-4842-915f-c6af36e4e2d0.json and https://artists.proofprofile.net/proofs/artist/8c60146b-cdc6-4842-915f-c6af36e4e2d0.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 0x79aab1f335a731bc4d9ad19b4fa18d66ad8beb11f6fc53208a654f04e69a9ea9. 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/USRMK1005401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b68f63ec5f16e69bf24235b3bf63b6b0891359b733eebc97eb062a9cb4f70f7. 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/USRMK1005402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc166e7f5d2ae44465a3cda5d3f4932796bacd407dadf3d3843ca76769ff74d11. 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/USRMK1005405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d36bb467bb6b6842f6e733d62305a934a32d7e4d49bd4ab5aeee6203e8012c. 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/USRMK1005406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ff9971a9f0f4079a4c41492d30275c397a5161389b7e3e0655d92cd5a5e96b. 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/USRMK1005410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8b8eef243ef1d7cf27a1925bfb236e3b51193e1b4fa9f49a53af1fefc84601. 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/USRMK1005416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e7755ae70610523d0413d1508b0c1aa368f8b11877f62ec40d5e9223489f1f. 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/USRMK1001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e2326990250bda9da979467e7951fa4e7143ae70f4f31e7ec69be9ea7d4506. 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/USRMK1001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339f8ae79070760cc319eb8b62b2881a2ef1567d044e8a87dcd0166ab77560b0. 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/USRMK1001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89f1578d426c6426ce37658aed05bad7fbe6b4575e3d150f755a75b0654d8ff. 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/USRMK1001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee688777ce49253c902c0a455d3327db28bb9fd542d4415a5121fb731d14895. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRMK1001005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f1864f32eba1e313ae7e5a19633bbc9d80fb95562c5942099939eac3544bd0. 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/USRMK1001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a6a515bdc5e2a071aa6602399312aaa458f48e739e3fe118f1e9ba5b3e6b5f. 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/USRMK1001007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6422f4f06f9e39c4ea700efd9c740488e7fff8194d514f6949f8d8451f9c726c. 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/USRMK1001008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa1ecac45ce2bb6b32ae9bec9f0effa438aeec8bbf5559ec6d06c8d23123584. 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/USRMK1001011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cd0cae6a0b7e4b1a5668f60373d180683185c1fd347083d2fdedb3ab750762. 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/USRMK1001013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d90dac061762213a58307c4436c76c158a7da126b3b46f836cd6f810f17c0cd. 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/USRMK1001015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c9e81af09ee2c1837669ac8ab6b143d2d9af2439b4c9b267a9f197a33626ab. 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/USRMK1001019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa091f94981dd298e187483e7a0365047d6f52c0ab44b397dbdfbd6cd145b6d0. 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/USRMK1001401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba67a514cb505d1b62a54d6e4543b1a01ebbba91720950fe39cff2600bb0f236. 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/USRMK1001407.
Boleros Inolvidables con la Orquesta Romanticos de la Habana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2066577c095f8605210406db4ff03e7af3454239bc7832ca86ca125dfa5e17bf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USRMK1000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2d146b5ca508daad2186f44d4b877e4508568cc7599c31d02f34835ab123c4. 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/USRMK1000806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e8bfab72422cce8c54ade083cdceea784bffcecba20f84972adac743a1619. 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/QMFME2009364.
Tangos Inolvidables Que Hicieron Historia