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 0xe70f0ea3eb17c19f9cab42b291139a9df6afa18f31a96e9dee90c0990b0d5552. 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/7e3f8d17-d573-4c63-9822-91ea351adf9b.json and https://artists.proofprofile.net/proofs/artist/7e3f8d17-d573-4c63-9822-91ea351adf9b.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 0xb168af60c3ab00f899fbfefbea81ced98cb629d1322a2a5929e93a6e38d5c156. 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/QZNJX2414010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aefef1f26f0daa217fafc0c8cb7e9449cd05e3563a4de35152fcf7347d3379c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ES71G2043826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62d48a6762bab52cdbb0fa4bc9d22dddc5d1dabfe78ef0e792094ffa25f9f34. 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/QZGLS2443522.
Sigo Pensándote (feat. Gabriel Drago, MNZR, Kaele Bigger & Chemc)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f88b2485029330b4247f3e8f518cea3c3d977f8197d08ce19c35767633b989. 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/USLD91747548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92babcc2c7c37ec2818e8fbd935139acc826c84e24d52b8a158ef2a403e81fa4. 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/USLD91747549.
Viejo Pelao’ (666) [feat. Gabriel Drago, MNZR, Kaele Bigger & Chemc]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763d7f47836c6e4a974e618dbe238d19fd046c639b792d119d85df92852f003e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USLD91747550.
Lealtad De Monte (feat. Gabriel Drago, MNZR, Kaele Bigger & Chemc)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ad24998cc3790814bae92595ce0f048486c9a81a66706006de8b3c5559d000. 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/USLD91747551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89db3dbbd875432b46b11463d87adecec5d9f8dd54b061248022ec679c7481e. 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/SE6XX2151881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c116ecc6b8b8aa725777e2e9c4cc23cf4f46afd9d53ca383bbe4f456aeecac9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNWX2275477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4c12cfed4b8c8580a9be116d1c62b691d81924d2ac8cf933a91b5be51ec484. 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/QZWFM2423695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28a532acc7af0ec96f22d36c3757650ad808c15768f46ffed2d99470ed79779. 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/QM4TW2580214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0992b5e0ba33f11932839cefa38411ae79a9463c222cb6ece6d3cf4349740178. 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/ES71G2230740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21253078c91c79e5b509c84e5671788a45bafb201745abfdb74c0945c7317858. 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/ES71G2046244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff117deabe15f1e4e6d14249943bcf87ff0b47f84aa7a255c1c3a0d3f4a0b70. 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/ES71G2325212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b76a8f0e5a979470f7406be3252063469834e540a46e9eee197e56f65b6c645. 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/QM6P42598109.