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 0x89fe7cb8b38a2a52afadc87d85b1588552f6bea479ef9f9e68b17f226ff3509e. 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/2b68aadc-78a4-4396-9215-077c01f6bbae.json and https://artists.proofprofile.net/proofs/artist/2b68aadc-78a4-4396-9215-077c01f6bbae.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 0x44bcb7c4a285db12568fcce3173e401484350a2404f1d02d86ea7699e76a1270. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAFK2128027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af61a379ee4bbd8fd0bcfacd648c3907ef4c8d656e4ff2931cab12fc954c0b9. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAFK2128034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36db50e862b48734e8df28b0a5fe99a36efacbe78cb13c566cb10c0009550938. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFK2128043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1629081301d6daf9f39e9f15e466ac3f0aa78d3182b67140bdd781588e71325. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAFK2128047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02597b6f536442e7f68f8e925866a0809522a31cbc5e63049222270714bcdb8c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAFS2103711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f348f9cfa5bd1fdfa5e1be124e215e0e82b4603a90e50fb134738c049046e25. 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/TCAFS2103731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2e3b5ef1ba33c064fd1b3bb8496d55937dbfbdd180781ffdc10a2f44bd0fe2. 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/QZNW72224937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6617a52152c09c70e595c7288a675bcea3bcc908c59fc4c643e828ad5120fcb6. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZNW72224941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1176423b57261fc3a26c16479195da36cb3e1f3ca24b820671ce3881b57b9f3. 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/QZNW72224943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a18715f2552a505448fc6d513a7143800ad063fcc430e1c1663a28ddf594ac. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZNW72224944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dd39fcd6a05970b09ffab7270c843ea1c0d8144b5a174949f1581ea68cff62. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAHI2304161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf5ea5d61f84bd73e25a70e7cea983c8b954d5fd3afaeffb0fbe8fa86b58804. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHI2304166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1506f4925e183db9e8c252e8bd58df41337ab5d56c512002f1cb7da28193cb. 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/TCAHI2304172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bb766d4d968d5d4bad2277c3eef34d86db2642bb4b36ebbe62696dab61fd52. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESA012333456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cc9550be100838abe60dae94b7bc387e1c28fb41a7e1eb32d368dce834406c. 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/ESA012333457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efdd1854988acb8584ee00339c12936eb38c93b1af4ef7f0a83a2a1dfa98682. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/ESA012333490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b61227dac20031391f83acfb1dc575122f01b412d079790f5c8b5c331f9cb0. 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/ESA012333492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e4394559637ecb4b6c95ada75582bf85c6219b4c8418c9692d2fca9192bab7. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJF2500509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3feaf7278331dda1342b1abe99fe6c3527523c328e8b8a95c386ef8623b4c7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJF2500598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0adf6c4adcac11b405e56610b0c5a8372c5e1641938833e94defd7dce6be125. 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/TCAJG2500686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f3d4e52b94dd53de53a1253470ea57e1e19bd9282d5a8b580778bd27ab78ca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJF2500751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0523f1e756a4c2434d6379fadc3ff482fe0ed973bd1b57c16950bd18655c93e6. 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/TCAJF2500864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1659b170f6a25713995e4a2391742be1eac45bddb4abfb5bbb27ee26f650552d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJF2500879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa807e0f8d9ffaca9d809468b09f9e4894a9746b08c39c324ba77492223c01d7. 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/TCAJF2501094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c17d1e5485d055ca26649973cc21fb6b07ac3a71181d88977a6d91956aac360. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAJF2501250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14851ee4000e5ca8c81ff803096f68370a84efe4d7f03c7457415f4af09a4d52. 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/TCAJM2515130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa534bb3574ac44a7ef2a4123c885ac8d7a77288b575429957a3fc8936a860ad4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJM2515156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea65b36e4a6b50cb344f5e623e52dc352330a3566cc19bbb4c28e679aa7a370c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAJM2515229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf939ebd3374c7e715115885e929535578061deb5539c6052c57b199ec503e818. 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/GBKPL2289648.