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 0xe419033d2ebde4d01c3245f1fca95ad84c6d69247a24cd80491b9c579472ed09. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fca64c58-cc45-4207-b590-4f4c291e643d.json and https://artists.proofprofile.net/proofs/artist/fca64c58-cc45-4207-b590-4f4c291e643d.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 0x317013bcf9df1270d97d3e5ca65d36b294c340171f4850ad0a07eaac7fe01304. 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/BKPJN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad4863ae258faaf707c8b3e362cbaa6d0614014db5a95348addb0867a983474. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BKPJN2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a27a28c1930d6179784ac322fa527ff64d6fe6625cd9811459e9c2d330371b3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BKPJN2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47128fc555ae00572fdf4368d0abb292b9216acfee8c429e1a5ed89497f5e837. 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/BKPJN2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c5ced2b1132a79b34e03148436770b3b441ca1fd451cff9c17860f66a44c69. 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/BKPJN2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea6778699f64a65907bfb25245cdbfb25aae231a5a1aa8c6241a2b980717ef4. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BKPJN2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a163ec03b97f5891bf4fcd3b9b6989f60b126ce928a4b80aad0ba6d8a3b0037. 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/BKPJN2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc93126b5813a1c7727092e2235d6b5321333a9600426b197897945ae265ff17. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BKPJN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9131e73125ece8806a6c6e785269633d9b8f16bceb18cfb769ee43b60fa116. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BKPJN2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2812f0fd95d010850a705b07aea0ab03439f08bab99eb19df3867d1a8e468b. 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/BKPJN2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afed7f8cd566c3d2a2a93667a30b550ce0693da0ffaeb4867db4697bd543e77. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BKPJN2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09547debd404ab152ed2b1863641f8aa6c8b19487f12f5ca854c3a41bcf3d110. 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/BKPJN2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea2ef483b7083aac61a1a778c9300940e7ab4ab8bd19e084e6c5c6e753ab070. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKPJN2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb995bacaaafd058e4581f3ccc3473a1bd0e743f76d1c6759512bf6ee635afac3. 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/BKPJN2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8352b30399f83066c708865eb131fdf2927da87b0ae26498d16e9ea96be33b11. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BKPJN2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2710cbf2cc1ad0cf35e86d9dbbba45e72b6fe1d77f037ec1538e7505b93f2e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKPJN2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf102778a4ea243090874afe78667fed9b16ef223345f8293255a6ab8acd36b26. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKPJN2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a797cfc23ac6b2108b02f2f9ae698e60197b3e8d60fd68e4efda2a48e3471bd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BKPJN2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2538f16c7ebc126eaea5dac3e766b25c1a13e7f8b7dce89139223cefa94c149. 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/BKPJN2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8535fad19d0b1e3ea5b3311602159a2705e585bc02563d9a033a88ee31fc3e83. 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/BKZ0L2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3fd4929e959fcce0efa3e77c3f0762db632c23e8f4355efd7930a3b4f00fae. 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/BKZ0L2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d586d2a3a01588400dbc8e0d1b66a7af48b42b4a71766b455c18298859728f8. 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/BC1U32200736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2476bd81e4291c1dd0030c8761d7c34944b5c8170d6bbcecf00b10775592e615. 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/BKPJN2400012.