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 0x7f3f3e25fb9a238ad05da13aceb21d9df65f854e843c0754f75f5c49b9ebc0fd. 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/07ed2f45-f313-4906-a9ae-bba3bc43454d.json and https://artists.proofprofile.net/proofs/artist/07ed2f45-f313-4906-a9ae-bba3bc43454d.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 0x71601971ae505637c78edb50db18e84b6210c926228a40f42a248b3befd9bb7f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PTGMQ0700403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275991bd51be15a0eddd73378cdaf7a733c0051600147af4e76be99d708b390b. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USA561369924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b63305213f952a600800ffb1a0c9e6118228f45e0d6cfead12c828b604394c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USA561369925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f318931f906d918d306041097f841f4c8040306fcf68c99fce458109378529c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA561369927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719d591e33e65176d2bbecb2aabf9ec9e85756473f4f3c412ed19c2ea472d11b. 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/USA561369928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7354d91022deb61208100360d37e438a8ca782368cb39525c63ea86fbed97903. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA561369929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee5b6061a7c342a1bb424dfcfb6744232e8477114605462199fba984ffddd56. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA561369931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd16611b8818a54f9899db19b3c1fd88a20b5a47bba4456414ba04969c5faebc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA561369932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3de9cb20e255d9565dff3070be33edf15a0b04cc1a59ca9630ad0deed69f55. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USA561369933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a229299fc27f8fcfa7e0ea544d241f97a843cf288344e30e5611471b3a18b12. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA561369934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60e44beaa30b7e339e9408f5a32d6337bffc7f19803b46aca2db3e370d2fe46. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA561369940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfddda8f4e8fa81b53102bccc6368989136f63076339b8db4dbc9806a7abe916. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/PT7EX1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2e73ccec73ff3b5e1137830081f0907d743a217017dc2279052fdce63c4c29. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/PTJV10900026.
Sem Salário Fixo (feat. Sir Scratch & Capicua)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a235c79e7e365ed48dcd3769011094cfda501b48e320f3f746a71faacc9637. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH1496436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a72920be7396f357f65eb76baecb655b7a04be7e61ed6d736977abcbd72b9b. 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/PT0HJ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0308902042d2f6b2ec0d66bb1af440ba06bd5be0eef14d6686047dd7e9bba7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PT0HJ1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7264a24c198590793392a650dd9e665cf149ea95e145862124ef30ea4d3e115. 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/PT7EX1600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c1e16201c3423a28330aef7661e0c48238ec3e2c8c2d881aad76e78743a1e4. 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/PT0FG1700045.