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 0x544be48fe707d32b923abc5844c8767bdd0f4a95ca31b48d17d952a557bc1ded. 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/05c6d541-2311-431c-8dce-bab67191e53d.json and https://artists.proofprofile.net/proofs/artist/05c6d541-2311-431c-8dce-bab67191e53d.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 0x4ba06218723fa51fa02f8afacf29cf1326bd1a2d68bcef447b1eb9d94832dc5e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEP2032916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d67cb5f1a2d2ae0fcafef22ca983c9803ed86e119c3df0cb9b9d1bc8f013ae. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAEP2032922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821141530c2becbc0ce3c21fc7ad0a0f2742751df1c13e8cebcac2a61248f608. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/TCAEP2032926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65e18eb76a348d24e1c7d8c6b6f6691b385c24de40b4303bc2983ae513c6824. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAEP2032767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e35eacfa53058f51be3119dd01d9e92162aee85e5e05bd163b78a39560aa3e. 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/TCAEP2032781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e63e34ded489b4679ca1c105f1fa415ddc86da71cdc86028f13e4f6b4e9b1d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAEP2076047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b108ab92baf1278834b30ce2872cad6fc2179e2c94e6747e488d2ef5781cd1. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/TCAEQ2005955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda08434ed638f444ebe8d2ce11767901c5b4ec5c4e61163ee67d120ed8b5af7. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/TCAEQ2005957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62c7eb043c6a27a94e962d4c05f888cceac315309ae1834cdf7844862d72185. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:50:31Z), 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/TCAEQ2005971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f8f3db009156712af0ac85aa39683f64cc5d1c2f6dfcca675730d8199b091a. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/TCAEP2076257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ef772e80fdc36850e96e4263f884e4207cde5f9ce4952b3a27551173a9ee9a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAEQ2005612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0257ce4e4e2bd928a4610b60c6e0c0f0583b57c813b5cf59bb1b8e72ace5e97e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAEQ2005628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dab9664b7b432917f89764a416faa720faa9f92eee5b829281975d858725245. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:53:11Z), 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/TCAFK2101714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4762bb9daea4866ee8b4735a32db3c0eafde5b1c41de8abaa025624c85886a02. 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/TCAFK2101890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbed6b997f4e087c316b15ad4cb7ba68219176a247954002854534c35aa3617. 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/TCAFK2101718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b7bc48b364b670b0877c306584c750cbbeb1a98ad0d5c0a03fcf32a9d68f9e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFK2101722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a9d883af9ebe825f7a0f24e5d0e97d0b316bb4a379a1f1ceea9419d826d676. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAFK2101755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0543405f46115132a5238d9109889b28c89c78e75bc73a08553655dc689984d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAFK2101759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8e9431009c91ab93dbec5ba0eb946ba1005e7ecad45b58b0e1707412ddfc07. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAFZ2110162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8478a10b05e7dfcb87a4651282905b25b587c9a4ec0604ec86b8a596b249e95d. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/TCAFZ2110172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d0e39bc3be48715311e688af7250a966528094f0e7edd62213ca8ae90f0302. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:18:04Z), 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/TCAFZ2110177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d16377bdf90cc866853e0aeeeac8969ba61c5fb1a647ba5f071274111584e5a. 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/TCAFZ2110183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593fda9ed685377ddfe2bab4eb8f89d5900a88be43d507559a096da420f804fc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFZ2110198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa018bae352dc7c310b509d760bc189914a79d3d4de977c60e4819d30ec11abea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHG2337989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831bc6f21ba0fa032766f8671059c03699b048d798f1110a62b5f859052d2f96. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:32Z), 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/TCAGM2286876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9593a920de653ce05509e8f5877d28e81f92e16a16c9d93995ddb5780f7fec. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCAGM2286881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3108d798b025a8c341de6c5023908a205b5f3b15826dd18963441567d7abd1. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCAGM2286893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf747b8231733496719a7321eb424d162e8f1ba1e7be9d9cfc66bc6bbd0eba3d1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAGM2286945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9104b9766a62f7befd0936e48ed41c50e70b6a79a699ebfa68dcfe686ea0b4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGM2286952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26872741a1d63655faf83f77db84dda25c9c3c7df7a9d2b91c89c83a3a920c55. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:00:42Z), 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/TCAHG2337424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab6f32d5a016b083333fb88bccf58a41aa9b7b13755b125504717ddce480fe0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHG2337551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffda371b62de1228498bbc42dc52e9e2b20c0affc6a6129d4f4950184b194549. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAHG2337863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5911bff093c7c8eb8d0054537456e27f0af40b511fd0dd1e36ef18d0087e08bb. 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/QT6632573325.