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 0x69a977599689622cf2aacd145ec9e98585292ddc156851d917442a2cfb490a6f. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/681d3396-d30b-4f2e-9b98-1b120f46326b.json and https://artists.proofprofile.net/proofs/artist/681d3396-d30b-4f2e-9b98-1b120f46326b.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 0x6bad4d2aba2f6a6b98f92e47baca57bf5b1fbacc6025ca24082311d9bc35f69d. 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/US7VG1721399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee8b021e2f7563aa0d47b4c5e0e5d9272fa85db38f96c0d9f05f19fe3cb3fc0. 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/US7VG1721400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab1d4cee1f2e1be67934e521b755e8ca3e0a128fa14ea6d960fd57fe4df065e. 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/US7VG1721401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722b75ff69c97d9a252cbd57803c8f8b78341282e4dd3bc3ce1d32c6afe3575b. 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/US7VG1721402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ebbac48bce7506524b3b236a06d82e1bb16ed555f12e4575472a6824b2e57f. 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/US7VG1721403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba77841c11bc3fdef3111b0279e30d1f4a26cf0cf09690720282065993d4def8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US7VG1721404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aacfd6a51b8979e4d9105c94507d9435adecb07b0a54c9a3b0d174c5f46f41. 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/US7VG1721405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201dcf3e333c939f160db977dc504d1d65825f0e116fdab421bd251def02326d. 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/US7VG1721406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0625a24cabd479f221d744831f1b958362b4053be4c689899a4fa085ebd9a1b. 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/US7VG1721408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc337fed6912e814b9277404e5e11029be732d4a488be051282f40f6c481f94b4. 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/US7VG1721410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38b40005e763d03ca25ef92ace6123eb5118c770224c70df9a371b1458edb71. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US7VG1721411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0765cd88790e32b3c69d0ddde9d32ed40c8129ae639406cec744534ab3cb0f1f. 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/US7VG1721413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70bc5b703211c21708df0616c7040e09587d3e0238f9a1f11abe25c3f82c64c. 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/US7VG1721414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35ededd5e1fce2533c1d429e694f19609de678316dd1880f201b7a49f38fe1b. 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/USY280725643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619c75b59cffe27d469d8c7c2330740e4649bc8623981797d690503e37a2d3a8. 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/USHM20443217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87c05a3e60a96e959b0d29fb4ca0feef03f2f8321201522c3c2aef9fadc1458. 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/USHM20443218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83a16f799be8bd3b8d5f9d9f86f76ce678bde02ea9cb74003c459098649c38a. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USHM20443221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31c488b2ab2aba36e8ee99870246da23ca16d71e611c6f4264097be863a4aa1. 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/USHM20443222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e6c3d0e9104f0c89542b001d8930bdeba2a084fab29eea48029cc6c6755dfa. 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/USHM20443223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a03140bec4fd6e7af3d8a3aa01e0ae800096f2298f76247dca6dfa96967df6. 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/USHM20443226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17771977792636fc0f97e3b8ca9320cddd838d019b7999c3fa9b43ea61911b1f. 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/USHM20443227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946bedb577ce2d32011ee1afefd45a3770345aac0498bc91f6dd7f5e95e9a9c7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM20443228.
Disco Alegría 2001 Vol. 2, Éxitos Salsa y Merengue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640475c209283b4cc4779352fb4e14f0f5b89a16ba7e9d5309099ed195666006. 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/QM6MZ1514808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dcb039a2acfb5d3b156d087909785fa56ae7644a473e6a6a569a78eb354d12. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QM6MZ1514813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2093a66a11bbe88644dc6a49d623be426812dfdd125073f13e30421e776e9a19. 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/QM6MZ1514814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a5fa77cbdc8fb8f2a2720d974809633fadab7600a27027355672d9274e228c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QM6MZ1514816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ce4a9339cd3123678d89fbcf3e3c589074838d0fef3c961525862829a9c69a. 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/QM6MZ1514818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f906bab52d449526006ea64ed495f48b1021b15a2937c976247baf3323aa1. 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/QM6MZ1514822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081cc21ef2584ead7495a98dae1eb7de17f3b98fedd4b8cc373cd96160d5cf14. 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/QM6MZ1514823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e8ec3d2878570a7c67898bc7ab38c1b6952672b48c0f991a31c229e6c0c447. 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/QM6MZ1514824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a9cec462a92062fc325947ace02f2bc752ac2afc91880094a3bf3249ea29e0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6MZ1514825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004142e5aa5b49b8c4ed954fcaebdf7b9bfed8d55c908aee8f7a81b58f03c5ca. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ITM770700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9036dfa83ee0e6c365ba1793a8e7c183749aa6cff4fd6c622fcef45baeba3d06. 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/COC011631847.