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 0x1618a2079090bda4dda294ebf3c5cd96110de227c11cbf742cc102083f7c4b24. 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/20f8febe-394d-4725-8e75-8e3069f8e131.json and https://artists.proofprofile.net/proofs/artist/20f8febe-394d-4725-8e75-8e3069f8e131.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 0x226b55f3893177a6a6f066059fdc5eaa434b5e47d9ade2d9f453b758336bfa6e. 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/QM4TW2336398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4218afcc42001b681c96cabefc20d340e94dcc048785f0658b4cb84bd02f01a. 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/QM3DF2272095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e528667cada3bc86a10894dfd9e3a2f155db7dc00b375ddc974d5f205458e4. 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/QM3DF2221860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ce2429fb9d98e7d70b0d5ac0fbd159bb1d446b199fff7344be8d823b7e220b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAHS2310771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354fd530907120ddf1397d8601f70bab8f633f24ffe56745478ce181ede0df5d. 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/QMANG2242045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc151c9fcb431cc1e7180d993b9e9bb3f3502cfc37ab268fd1ad9af583ebf9d18. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMANG2242046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553eab21c50301b4b70feed125c4fc53cdcfb45210f5a71e7094e2276fa11ced. 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/QMANG2242047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f6de5f9945ba3aa2071d198828d6d00a8a9348c0bc9d45797b4ec2c9ba0813. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QMANG2242048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ddd55cede5033eab3066321f2282916229db7e47065c9e2db628d9b60e5352. 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/QMANG2242049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9326a77c29508b7e133badd3277b348239909455309c81fa4a8338684cb0e69e. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QMANG2242050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c13150e4c80f79f4c59fc01c4669ed9fb050bae6413483d0c3816f022ae991d. 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/QMANG2242052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bfd0ee8931ed25ef924361e40001abb637ce5ec854a1ce5b007fc21372d44f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMANG2242054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf484d862612991fafeabee25880e10db995ae763942eb79eae1d60fff54b6937. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QMANG2242055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11750aadd123710d165af7fcf20911184818f07408abd492eb61c76a796fc20c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMANG2242057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2506f1d3d62346cbb3bc8990d8ee03446903fc64b35d0e113f60961b4f66a9d8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMANG2242058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc253a2fda2e6472b3137cb50e9261948e7322457e9fc59e6a5c4e7334b9c452. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QMANG2242059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441a0358f9836f3e661ab63c695a6f2ae4db24ec932fd38c3da5e8e9a2026fde. 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/QMANG2242060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dce488b35898a25640f44b304fb06d548ff98333ef6f76232ddbb61502098a. 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/QMANG2242062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295506092721f8f11a2033fa833f3c5a1e95f118e545b09f8c861e7a743cba46. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QM3DF2272465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874224aebfe0b97b53e2b5ce02b812372d202223e943938eda3520c0724f9ee6. 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/QM3DF2272467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4a2eac21f3afef392da4a8ec6fe540db21d74e0b74d992ed233c784ecb7f7c. 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/QM3DF2272471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766ffe18eee7484879b2dcd960609fad59b42ae9c4121aea1e65adb8e960cf1d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USANG2299798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02b365390c2ddcf48152545529109889a3f3b10eaa0dd9a0f73840d7bd0b6a9. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USANG2299800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbfc0f8514249e371e6c5034b9eb5ab38a947062d89960e8e75e0ff982b99eb. 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/USANG2299814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c8df74a35b89f880a107f8c887ed3500492dad89e45c81648d5a7dc45a4011. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USANG2241983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fffd4948012e576ca0410ee9a8142a9018deaa9ce8fee61381fd30a207f39d6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US3DF2246059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2393ee7d87faa76241b6ec305210a1b961ce3e97c83c42283a1d097d3a3299ee. 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/USHM92176703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcdf081dcb61e94af5962eb27ed632ff464efc6e49b94df271d1c4790407a88. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZDQH2392954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d6c9146b21027fb0fb9f417b9d2a73fcebe21514d7c250be524e04f5d9ce41. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZDQH2372717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fc10a956e5ac0e6c92fb9a9938441d67bf3625a5045b109efd0a7e0c94e0a9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM3DF2220162.
Regreso Del Mayito Gordo (con Los Del Sombrero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccabf1c3b09879e0dc8fce01bcf89aa2617a88dacd91dd833694403064074459. 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/QZDQH2384457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12e7df4cfc1411fc4207b180204fd5142d8cdf471318e2f003220b52c848013. 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/QZDQH2389119.