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 0xfeda09076c2dae04bef6ca67b9871104c1024368ca4fedffec2b8e605dd6ca17. 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/fb13d0d2-df62-4b6a-8621-4318dc5f7598.json and https://artists.proofprofile.net/proofs/artist/fb13d0d2-df62-4b6a-8621-4318dc5f7598.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 0x7ffc53bd7cdeba4a14536c74ce17e036310fc844ac102a9f452db20c80cad0ba. 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/ATEJ62000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380d0aff1e824b9616c1668cd9ed1fca23c998df686d6cb47e9131af05ae0059. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:47Z), 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/ATEJ62100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee5fcdc4d23a2fb95f0e5123a54255a3255179bee06cb3b1a2a46049ab58f42. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ATEJ62100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3adb3fa323637998049689406a9b8d0a2a6fc5793d05d0b60b3b7f147ef3ba3. 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/ATEJ62100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ceaeb7069a80f99016838c762d6511323971fa846a33837ab90e8cca9a57bd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATEJ62100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf048db6584abc54b60499d8eb3610c6be6282d05c81ba862ac065e86379f5d0a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/ATEJ62100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e31921522e007bf426b5a503ff28f922c135119e06f9a5e5cbbc4eaa0b8f58e. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ATEJ62100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0bb858bbbfbf339bf8faeb5ea97375dedf05bd53c1dfebd4aa4136c9f65767. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/ATEJ62200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c9f4c4e1f2a7ebe2a48b50b1135b82fcb157841c707110b4a8de24515f33d8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ATEJ62200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c06e2c1b3e3b5de6ce30bef0d18229dd774c84eccbd34c0d6e9687aefa8ee63. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ATEJ62200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5808ad3a6c513aed54ab1805c9b206989094066d9c17ddbc690dd180e44886. 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/ATEJ62200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b3973d76ef5480176a090f2d8d246a617fd119877cbbaa610bcc131c1cc573. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ATEJ62300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe43a97ab4f943eb47ff0282641c9c31d33e93225839a2f958b8ae6ed24768a1. 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/ATEJ62300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c53b26b571c4a5489bdb4a215f88baa34f398627cd758ad75d9b427f2546564. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:58:30Z), 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/ATEJ62300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf125c2fb7d92829ef76f7f43ce8c82caba0c31ee01448d7ba1ba9e46c9989c11. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ATEJ62300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfa739ec2e93f56f24dea3b0457822a4557ec1a53f057296fae8bd8171a513f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/ATEJ62300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b3973d76ef5480176a090f2d8d246a617fd119877cbbaa610bcc131c1cc573. 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/ATEJ62300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c53b26b571c4a5489bdb4a215f88baa34f398627cd758ad75d9b427f2546564. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATEJ62300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa662ec405d23afa8c53835149e0d7c7f9596ce8e50a1172e15b5c9c5812f9164. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:50:40Z), 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/ATEJ62300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314cc20e73343b4a4afa660f1292c58f4b8450f004a7c1516e60a9fc4176ccf6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ATEJ62300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411094a637b38fad27f9fe3d869a881dff61a786da1d6c199d9029fefbeed27b. 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/ATEJ62300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6872b2f27e245258ac75bed0bfd9e79e355424ca36f2d7571700e7d26bbf196f. 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/ATEK02477039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb0a42077807eb21a827ba1dcda828de5c336da9e59c4a713b131a2840728c9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/ATEK02477078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268f67b2f21bf9cbd20e9ac753019784f9343c08b27b68863eec8b4668a06cf9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ATEK02477091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6872b2f27e245258ac75bed0bfd9e79e355424ca36f2d7571700e7d26bbf196f. 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/ATEK02477039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39f1f7035de382670af0fac6b7d4dd8e5b121cd16643fcb6da05aa99e681086. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/ATEK02577015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a4ec1ccc4520dc57a99c38cda0862add808f1056f33abdf10497b8e11d676b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ATEK02577021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e13da7e047a78a711e4e15cb515cbd31194d1f51c0aa2b3dec651ef03be6483. 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/ATEK02577016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e1c3fbfed4a634e2e65efb8a1d32ea21d02008800b630af83959354bf4dd6e. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/ATEK02577014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe880cdc7c745a996ed1605e227e58362cdffb9a37e74a8909d1e08182b2e1dc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ATEK02577013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf7fb30bede7482648a1ba103ab7f1beb55805b095e906c84d14055c64ecdb2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:40:41Z), 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/ATEK02577002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506a105f60e9e8a5d21ae8fd0bf79e068027b191db13a8b54ef03efed2a22307. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ATEK02577017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3498887c317ec6f9cdde634863a57067b9807cff1d9da9cce624441faa2b3b6b. 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/ATEJ62100173.