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 0x01a2fef2d17f13d33308ed1fabc4e50589aeec09415cd4c97f9982566102e28e. 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/0f768b2d-deda-4b63-a4dc-b3be02170258.json and https://artists.proofprofile.net/proofs/artist/0f768b2d-deda-4b63-a4dc-b3be02170258.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 0xe995483b8b85e55f80ab1b5db1a8c73c4c1cf2ab52bb7aa6d24794b16d2f9804. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ESA012001452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd327aa4b99f4de7ad0b6fca83751b12d9d6cfbd9d2d38852afa1a2a574652197. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/COATT1900289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238b7a181221c10a26742e9132faa0a7f9e4c115dc9fd2da1c345e5a7aab36d9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/COATT1900291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8a8f99202d954ba25fd231832f0599ae36bea6a45a940e04eeadea271b626a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/COATT1900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af830e112369181c57cd5f4ca334ef9413dbf2492ab2f1e739265d61f946e6e. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/ESA011846861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26da3f9783d0aa157b65dc998756604dc535800d4ddcf6a8516a19f59f33f566. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM6MZ1704888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa479b7abf98494106efaadcc2118c55bbf7bb4fc8cbbbcbbe7bb3e4957b97a4c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6MZ1704891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124a72173038575e791f0dcdf96489f9c8149055a0147599994f501ee5ec911d. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QM6MZ1704892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c4fdc7ca079a4e7a4688ed4216278d5f2106b1202247b89ea6216425134034. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QM6MZ1704895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04a60d7d2dac33a5557a8883533bde3a5c735ee0bbecabb2f246215945aa0dc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QM6MZ1704899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe338282ce29577b39a1108b945cd092f61427b939bbcdca8ef43c44aa8a6b5cc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ESA011964907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8212bec2992a6cb64429d4651091008215572c889f1ca5b8d549479f10a687a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/COATT1900297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2876fbc29390c9f1403fe29d73b162bdeeeb627635d7002b96d50a4d5667adc2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/COATT1900299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ce4c5147b40a7d5eceff6edcff6977ded41dd14d3c61e6703694d5c8f89c30. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/COATT1900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3b75c51605bd0012c77f7444367ffaafcdd6ad9f9223dc184222f508066f03. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/COATT1900272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee9407ef3aa3b054ed777edbbbe0624d052b41f0b62debfa413b98b9627a8b9. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/COATT1900274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf65738ab8e7baafb2001b01d8a66c40fe3d73d82a1d6bb571567947933f981. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/COATT1900276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40130d61bfe56d398802a33b984ff993b1eaa1da9cb0fa1d44c5e59f4a6dc6bf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/COATT1900285.
Exitos de Rockola Grabaciones Originales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49c545a33707a75598868836e82e6aea3b519cede0c89e98199da7939c126a7. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZTVM2474459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d464cce76283b2dbd8bff2c12e0b13a2299174f4c76bdc4ed6317e792f1a0cb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM6P41556825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d48bf81dc9c81c2da4e9a04d147f679fbf60fc4fb4e75d92058acc3ed90dd3. 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/QMFME1535869.