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 0x2b26a3b439a7c246d1b7e6c4769a294799225afd138491ec7a0a7d5794900cdf. 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/5b3740ce-5dfb-47f4-8846-0bbea46f5e52.json and https://artists.proofprofile.net/proofs/artist/5b3740ce-5dfb-47f4-8846-0bbea46f5e52.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 0xc5fc71b7b74d20cb58a9fe8acae808fded0d7837618ae6ab3f775b3c0a1e6190. 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/USHM81604391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b99e53ad7ee9c946824a1822302ca6f117882daa129e86ed473ccf7c15e5bd3. 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/USHM81604392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe468d7b1360925a441903c62d8321f7efc562b65f3d6ff54155f38563e152d0d. 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/USHM81604395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adbde0431e30553313256072885a72d03c686126c44925cee9b6e3b075e1722. 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/QZWFM2411262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92b09887f52b9c3132366bfb5419a904f0ba8d5b88f42eb0b2b2e10266f820f. 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/QZHNB2273316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd173e8c71a44c62f51c5750872c1c30b7b810691e93e368c6ff49443f41f0951. 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/QZHNB2273296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b9454f08915e096207e4be646b76c72560e5158cf9ba17e1043af0eda7554a. 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/QZHNB2273275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37cf17397e77c6b5ded31fc11f92411bf65c37930b46208ffd99de01c690bb8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNB2273268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc363447ba49c16a45b0b458f619c090488b4db67d25bde7b33847f595340c1a9. 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/QZDA72268007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9140d5e78c2777c10c2b833c8271e895fae2dd69dee904ffa253b3bd586c749. 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/QZDA72268032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d22a1e67150eb79ab187d397867ae5a58cf84a676caaffe87f9101850d432b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:44:39Z), 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/QZDA72268010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62b0482c6b8eef2a4ad2c32342ddec461006321ac795a150dfb0b16bd6493ea. 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/QZDA72268005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c9fa84cc55964131d96132c32307df0ba28190d526a045cf27563a6b503af6. 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/QZDA72268004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856f08f5f5cd29f3795fc3112c93da718e0d191f9e9ef4d0ce3969522734800d. 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/QZDA72268009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bebb9fe754fd7145f50093f216a333bc632c87dba717574aa0497a8f215236. 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/QZDA72259401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf330c1aa895eee57a0b7731ed5b4d4b4ee78fdcf6c05d150c726ca3c22dc14c. 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/QZDA72259462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a827ad2e3e19602309c12ac18c970f3747d2bf1af371c778e262bac24d3216. 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/QZDA72259410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238e746d12fc679f3b4a4a7ba464afef21af8a8845fb1c2e04b56b13a4a39278. 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/QZDA72259472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf9438d5998be05aa534f8e48037ea5835b8a6ab654cde49f4cf41a0a11466e. 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/QZDA72266173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9156019ddaad34b40c7b55f76f10aad71dfc1f1deeadf4c59cfd53f6ae3edcf7. 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/QZDA72259426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eb63670f7078072b20fac2eaa9b6bb3620d5572b1f70764e3d90f8d0a6f2eb. 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/QZDA72259370.
Abre tu corazón ft. Coro Angels (Catedratón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706ec28b6e0a2de7e73ac6736548341f7914a8d93ed6297ee4e498785ba16075. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYY2290771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d267928ba3ee31c1f6004a7942170cfe34082429ad5b869ceb1dfe4a4b28eb. 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/QZMEM2186632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a094f024b7677c14ca051c910daf910448a574aba7ca2281eb5a35fa865af8e. 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/QZK6G2190322.