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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a831ad1b1924d7311367486f820128d43cbe31cca5b605c7b76ad2b156c9eb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b468b05-1a10-4268-82ff-70e29d6d23bd.json and https://artists.proofprofile.net/proofs/artist/6b468b05-1a10-4268-82ff-70e29d6d23bd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ea7baa14501a1e265e1179c730f3e2ee5ab87108013097ce0a93a667b3ff7f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CA5KR1540277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12f88e015ae42f5088ad0f6e880785c64d7c4152000c6c29961d8a837a9942a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/CA5KR1540257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9377f90dd975ccb03eb1c9ca7204886679df3343367b70d6011dd4edc2d8e0ad. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CA5KR1540259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4718ccadd9abf33e49072f805ab01d3222bc679a3458bf4a107c2813babb2bcc. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:15:26Z), 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/CA5KR1540260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad00910f56992b39ec3948498fc2ddcbf404aa0a2d653b1ec4ac725d7c61028. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR1540327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c2db608e452f9edac3fcfb1fe05275c22b20c55bc2f94050df837da2130357. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CA5KR1540328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a41bd1cea067020009fccb089efa07d845667678f8cc54be13e6ffd64849c2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:00:32Z), 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/CA5KR1540526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8109f6dc7195c3fdfc51fe635252b5b743a87d677eaa220609419a3d5a0bd256. 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/CA5KR1540527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f04359386a5629711394910c38e75219290c0cd558de7395120e0ee00b6319b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:29:27Z), 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/TCADO1864019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88f075289fe268a131f09de3fd6f0213925cd035659761b74939104d2f26097. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCADO1864023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240be198e59dace149b17f8d766e6b1635b783dba5c45d0e2b1c86eedaf66424. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCADO1864024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d68f74ab5fb8bde272bdcce66838597a6c66d10e5384fda8153a7d96e052f2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:18:43Z), 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/TCADO1864025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d9ff62bed47b49baa5c205062721c2108163b52e99e232711ef6300bbf6300. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCADO1864029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461f8b58c9b08605483efed3c45e16b9e58457c8bc522ec2de6c3296db2fffd6. 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/TCADO1864034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c932c3a7683a6a45183168a5a8dd3c98d2a2248d5f1bd94ca514456fdf9147. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCADO1863955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397ea7f08f2dcbd184a719735e35ad37db35173b8b74dc473245cf5a268d16f6. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/CA5KR2238820.