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 0x0b059a0b2bacec722c6e9153483c74345dfb4ae4f6dd1b41291385dab31b578d. 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/1b72e84f-e293-4fe8-acc5-2bbfeb01c9e0.json and https://artists.proofprofile.net/proofs/artist/1b72e84f-e293-4fe8-acc5-2bbfeb01c9e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage Tango Nº 11 - EPs Collectors "Famosos Tangos"
Vintage Dance Orchestras Nº 63 - EPs Collectors "Cenando Con Los Violines De Pego"
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 0xd5b11f2eb0b49fcb36744447eea74218ae31ab21b3017a0b358444a23712e9d5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CA5KR1963023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faa1b18ff9f1d9cbbfc28e30b4d197a68ee9e54c444843b186092839f645e82. 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/CA5KR1963024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b83ca36a352c6461a7af6c0885892930564579d9c478373b0db15557de152a. 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/CA5KR1963026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792d3b02c789b563c9878ec7f838c77160d1e504a051a4c7226fce5587a4558e. 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/CA5KR1963029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a835dadb4dd15d15e4ba6ea420bcb04b25f2efc00b55fb60a28c324038aede8. 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/CA5KR1963030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc713a5cb2f8a8cb31fff519b148b543119327df5d80cd1855473c77ddffb3710. 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/CA5KR1963031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10823a0dc169f42b0782d2059f1d78baa4fdf49beab4dc0e94526f3a8d9966a2. 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/CA5KR1963035.
L’âme des poètes / Dominó / J n`en connais pas la fin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2783ab3c29a984cc6ff4c0b1c71114413246ac3ad7c6a510e2da72744a9823a7. 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/CA5KR1963036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9429901070fbe6c21316c2f5d6863b53e98fbe078f2ca43e4914af4fe62694ff. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CA5KR1963037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ceb6b51e0282863c801faa2c5729917ce8d30d5d248d7269ebf81e95431c54. 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/CA5KR1963038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d70e425d445cb9c04dd9efa90fc5950f383f623e40e8f0cbcb9769cbdc47d24. 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/CA5KR1963039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7020aa40b7dd959789f50f078469918e1950f2af8bb9814b0ed259e141b259c0. 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/CA5KR1963042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5392ea70c7e366336085885eeb32d18e42a967e64beddb283f550316d99e08a0. 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/CA5KR1963044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be28465124b3f489f35a3eaf4efd4d13e88d60c9a645ca3fd1190af36a5e58c. 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/CA5KR1963000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c77f2722bb49ba165e5b65a3de1812bf00da59b5333eede0230a1db9c68265. 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/CA5KR1963001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945d83f72ee837d78f124d52b27f6771f00e965e378a6ca5ea630f7e4f2af643. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/CA5KR1963002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219563c9c11a2c4b35b194c1bd060881686131f98b0f83d0db240a7c7fbfc5c6. 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/CA5KR1963003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a79c8b02ba942c73f5f9042023db1aeedf8e5571d0326b4fba4800cd683557d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CA5KR1963004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2990e4c0821370cf0ba90cdc698cb967af53d7837064d3fb7e6d11638afdea26. 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/CA5KR1963005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5760b7517c4a6905536cd81188a8024b62721717bd84edf102ee747ff0af815b. 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/CA5KR1963006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65eed7083aaf944b1a96d45761be45e634a51c7d8bc46efacaab04f57a977b82. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CA5KR1963007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633e13afbfeb56b42c43d59f5c81fd65653ee9658b637d6d7e6737b86164c070. 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/CA5KR1963008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d52c6a686508e3395ea2ee7c9f3dad9a3d2c9a0b407c684bf09ede78e6dcc8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CA5KR1963010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4999cec821707616cb85c479f5cf17e92bf9f6a410cf84b2be57d0f9a2377b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA5KR1963011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e749f16e2fa31c6419d492e86911e2d16ecaface5fbfdc3ba11aeac9664a4c0. 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/CA5KR1963012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f300a52f9aea9923ae832cacf7a3f7e5c5dedb242f7ee98d4b10016efd7f7f. 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/CA5KR1963013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7048982cf943c6160a074124936d1c3ec20949fa802daca18895cc50796a61d3. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CA5KR1963014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3547ed3b09a22845c48920d3f59118b9a733389314788dad5277da7d29b3bd8c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CA5KR1963016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104d6e90849e3fc04bbf82d3d43bed640943060a636a90287b02914620e91cf2. 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/CA5KR1963017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e59aba094842540a840621745a839599e0f9b285afacc1e9cd566352f20d7e7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CA5KR1963018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799a466ec50d984531d2ee5e5ab14b7809ffb4f41e27830a1c5afcdef45107da. 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/CA5KR1963019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ddff03ebc2f0aecf9ba01d5dc86f37a180e9c86509c949daba21419c39ad2d. 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/CA5KR1963021.