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 0xaff198eea9f33bc92854ae12f4289dbd2d15ab3ec1030ce23ba5dc0a67f86995. 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/bcbc7653-879e-4152-bffe-1e19df92d3ec.json and https://artists.proofprofile.net/proofs/artist/bcbc7653-879e-4152-bffe-1e19df92d3ec.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 0x59374a605263ba730f14f43e3881c04e392286d2b641ed10e1209838a36442d2. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/ESA031208402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc315ef02d31c7a719cdb158a4ccbe15a32081253d6c6d7f469aeb6f2cc7958. 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/ESA031211006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424efe9e77e78547319baef75805edd561db511a9ca18fe1a6c3c44abe3114b9. 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/ESA031208301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672e289c4df6d5db5584381daa9205dd5518b472a3cd023c0f79282845528a93. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA031208302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7216c7d332880cfb158e2b6e512b390ed87d29bdd95f0e3f59fcb5f9c6220fe6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ESA031208305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f9de491130d176529f284910fa91781ae745097f0ab5550d3a6ee3e491274e. 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/ESA031208307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0355e66101e004fdb1caa1e62b20003525d419a9ec8ec9b2bc69236f80d91b79. 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/ESA031314605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645f5fa54c0b5ed05a83b95bac2be2d2284d82a39ca517afc4822ded08dd4f18. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ESA031314607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d90e7875bcf856167a07263b4251878aaeac1786983abde6a30f9b86ad4a8cb. 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/ESA031314603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e83ba7495fa4db59d3340c566b6f7a288c93fc9bf4ade012b36f2616f39d80e. 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/ESA031314601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200c8b25f084d732b6e676890fb86617fed39f99ac9acd17bb8d8b74e74aacda. 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/ESA031314602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449551afb5a1989edec32c986d0dc3f657b512725b1234ceff2a3ae3d70cd080. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USHM21671711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce33e0dd8477a16a0d7ec2f152333cb6dd5852a467d758c7cfae0945dbe6687. 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/USHM21671713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf0fd43656ee79610a896e82a76140c1f544853ac7ad5dde78c3ad94ae6170a. 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/USHM21671714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ce75ab1356dd16aa1acb66763c45e3e242ae80898afc7bb1fafe7c99449391. 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/USHM21671715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75de445f300ecb9bff6e3ec6c182b1c976eda64ca423e176c38fb08737a8cd00. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USHM21671716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429781148a15cde4ac2e330d357bd532e985cc3165f764bd487116c3d770a7e0. 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/USHM21671717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20becd148f37f8d3db9e4be37f5542666e8bbd13e2360ad5bf60f050e5a54cbd. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USHM21671720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a06b7b8e34cb66f42ba0083697fa58cb5f2d3d6709638201b0abdc1a6b0245b. 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/USCGH2178969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c049a4b04e53cdcf21c20d8ff61a286b0a3420341c7fd7b88899094ca46b909. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM22225868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5832fe843666c963b257b9a4e148113cf03e566e1e41bc0a399712394dd1ff59. 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/USHM22225869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d562ea1b8ec6b0e8a8fc4e12726f93916e4706b607d41e7d549c3d1d9f0e6a. 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/USL4Q2295780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe735046244ea2748df880b774e2e5e650a82a44df61d6b6263feefbe5629908c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/USL4Q2295782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4d48e510dec5471c6160931ce9af67426b471965769d090e0491d639c679bf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USL4Q2295783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958271ce9175caa7a73cb8e65b689acfa3bd8d5e4b468615d7d385de50a57ec0. 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/USL4Q2295784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44d0ed133058e018e8041411c01cccf519cba5df04b06ac9cb0ed3e61a32bf4. 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/USL4Q2295785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0f17bd30ab3bf6597baa8001f3375ce2a92d1116f6f9bf4f5cc2bb4ab71450. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USL4Q2295786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12700adb67afa44d0c624e7db53384dce706e2bb5a41faa2151c800ffa3b5afb. 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/USL4Q2295788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921cf6915cfd238a19a6153c52ffe6e59572693927b291cf8ccc7dc23a403e61. 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/USL4R2464189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7995997ba7115b79cdc9df65b73ccacd3caaf2a45395c3a20dc71f6bd511b59f. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/USL4R2464190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ad26c77e23f37e907bb7d472d5898f0d4d35c9e64281ca665c5265b495b171. 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/USL4R2464191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2db7778233d2d26465dbc10c48788974c63eb25b24e8b353444822733975e7. 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/USL4R2464192.