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 0x9140398b5bbd6235e7c5b1e882a354c61af79d2da17cbbf47e2e184c876bed8a. 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/72b75b64-9caa-4ba8-b061-dd6e96645948.json and https://artists.proofprofile.net/proofs/artist/72b75b64-9caa-4ba8-b061-dd6e96645948.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 0xb39ac39626b12960aaf4e8a322df6be9b9102a3042c9c113d530ac84fb8affa6. 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/UYM121601175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f8b05130916a15852566afb5e85534cd1205cb7d01e20d01f16cd2c08c5404. 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/UYM121602628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abea2ffaa051aa3b06a7e0342115df8900cd0d0283eec5179bcc288a9787244. 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/UYM121401155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b83ed5b9ca05a645937b4f700c248b7f0e2f6551877636d0eb20b34000c27b4. 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/UYM121401153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc788298ab5696458249c599ccb47dadcb48e1235c01538cbe40daf9c62e3f49a. 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/UYM121401151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b83ed5b9ca05a645937b4f700c248b7f0e2f6551877636d0eb20b34000c27b4. 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/UYM121401153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abea2ffaa051aa3b06a7e0342115df8900cd0d0283eec5179bcc288a9787244. 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/UYM121401155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802ff7a542abde3986187f970e34ec8444a52c6d73cb17459ca9e32eac2f7e33. 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/UYM121401157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d16b28b05d31406f3c5f37bde1b2708f540fd623e67fa76aa560eae55bfdf9. 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/UYM121401158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e833d4bb8a62ef467f798b6ef62ad6f556ea326ef42bf360185e309b1cbfb85. 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/UYM121401161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fa2af3e17918a6104b5661afb70bd0ef974c484c121344ad3d4044ca55a573. 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/UYM122400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c5e5d8ba2e7f773b38d302ecdbf9b460e02fdf5308ad5055aa20f8938f5d00. 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/UYM122300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f48fce653faf7972654adf1a436e8380edd342b6ce86520f4a5dd82667df5a5. 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/QZNWR2320443.
Para Siempre / Tan Solo Tu (Enganchados)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8e61a6872fa6d7af7bf66864dfb707c01b1f200b4b4aa86babbe376d9937b7. 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/QZTB42207118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead5b4ee3d198e7d4f7c0f81dee6f62c5225eb19592ef47511feb60dd5842037. 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/QZNWY2244643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d2b463c1bbbc830100463c50fd2e3f717d82fb3d0e792731157b467659a10d. 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/UYM122200821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bf92f754c8cf6c15c7ac1da78f02a3be59756e8cb8a9157baa1c0507d8aa46. 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/UYM122200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb00d9a4cfd4b3cbd8cb3c8b875f5d81e5fb1b5dccbabeccb9c9126c016e130d. 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/QZK6F2416713.