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 0xf1b288d22504d7ffc20ac1293716787e8e25cfe6d0fd13912a9c9dae422242f9. 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/e1b42992-0a62-452a-8218-1511f8464a13.json and https://artists.proofprofile.net/proofs/artist/e1b42992-0a62-452a-8218-1511f8464a13.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 0xb7fe68bf6c15e86f5b67b35219450f6f2b11a1ffa0dc2be03948179866efd5e5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHZ52036620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0b2332cb6dd7a422a5932a863963bcd347d8dabec047e371b3485e15b58f8e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMBZ92018872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c39413ddfdea9dc384075340f375c6643087c24a220bfd1eea6208c644e68d. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QMBZ92018873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3c70bdc34d952bf0566a76eb14fd500143eda057667e6ba1e96c8a4848c638. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TX2103547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ead87346f26fc4201c9b032f279f186867f4e1027cd333ff98badd2c98e3f73. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM6MZ2120811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ed65cdb1ee9a7d3a048ef3f5951bb2b61c91872069adf347578aa3f7f0d99e. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QMFME2160049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d28fac31913b3d7aefd671282980854d37ce0cf52179ff7c8c366eaecd6ae4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZW9L2258549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abaecde1b76b725cc92ed49a5bbcc24c43c04fba393fd70b62e47b1048f5875. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZNJW2364732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69af1f6d99dfcda3b41a3d013b07561e444d026b093b0c5eade992829c6c5585. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMZ92457415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715c5b626758d1a5dfbe10d127e213949b94f3422bdbc5e1ec85ac20b31aa92b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMZ92457417.
La Pollera Colora / La Mafafa / El Animalito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230c7736764cf6be0a5c7a8c5f273262a7a48ea84c4ae938af8e52f9d29dca33. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMZ92457418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa106a7abe8b9fe6f481440207d5c50a558ec327254fe0fe63004d4496a02ef99. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZMZ92457419.
Cumbia Badolera / Las Mujeres a Mi No Me Quieren / Arbolito de Navidad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ed6501162b942c59d5b3bef2c8c83fea669d80fe70ec1304a5990481146292. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZMZ92457420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444ddcdfd32e9066838cc83c46c09c191fa119766ac368b819e4651bdf7f27b8. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZMZ92457422.