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 0xc845bfa8dbc3cd1c6d5c6d8d550ebad6aa574eaa664b69588347b75273e6edc0. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71acb8af-9841-4944-93ce-cf8cddad2511.json and https://artists.proofprofile.net/proofs/artist/71acb8af-9841-4944-93ce-cf8cddad2511.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 0x08af064588d489d222e6a8fad7df8ca4900e47e99f6ce17f99567a0d9fd50b25. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWCT52217378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f9b4d8d30dca77c7f676ab76761afe1564c8f8111dcf50bc65bc0710f94801. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWCT52217541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b421993ad4af19d199c3f8b5aef02eb3a310186ab81ac80df4b0e66e77e3e41. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWCT52216731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa796ac4692bab360d065fe6270f750976c956b12273eb9aceac489b2b3bef79b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:10:06Z), 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/TWCT52216736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6f1e6f1012cb77b71de3ebb89e19363fb546f7de82077d1f2c4fc754ba26b5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWCT52216815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb6f20579731269e73b31be921042eebc35bca35cc2c329d94c5a35c9c1c782. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWCT52216820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5853efde33247a10c018591fd35f58beff0227228c225ede63f7c19cec44987. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAN78690113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aa40769388738b80266954ebdb756739bfbd666951275b2e72752b33767f92. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TWAN78690114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98426e0875232c3beab7693b65d0c490a5fd19b38b2f2f48561e7fd56242e7da. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWAN78690116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2a6f8a6cf8286613e9ce3fb42862baea7f062c451e23a243742b2dab44ffc5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWAN78690118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa8ae635cf9d7bc53061ad19eaada1c3653b75e7e7433c6fb6cfad42dc6ae08. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAN78690120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d33f00f83a84bad06908dfde6f12b530b078767bb5e2341953187d3929de024. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAN78690121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a3ed09e9ab269e04ad8b0349c4ddf4b6fe005f05e5b6a5fe60a0da92e94d1d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TWAN78690115.
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 0x28bbb3f0d461482e8f90dcce4175e5ae6774d3ab7daa2225e488f0ca9b17015f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TWAN78690117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00656d8dddb2fcd8b2f7fd158898cf322a2905e8a94fbf684ddcbb6072050788. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TWAN78690119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801c0ee385b7a130b3edc9798349249fbce8b85843f7067c7feb5f585bc5d1fc. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWAN78690122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6fa02bef5b79804906d4fa40626b7676926c6a5d12dfa4b807827a2b156f2a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWCT52211995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b67fe2a091182c819f7e3f44fa2e1a09719d876f0ecdb09fbd83e685b91cdbf. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWCT52211987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbb789e0a13126cf25a9e10633f56093886f03706cd31ab0d076844ffa7b2f4. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TWCT52211993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58df185a3ae4144ec0a60f0ad5901cf66f3008f77d76029b9da1a7f07949e5aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWCT52212056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25f4885b824db20aa36313c2e0b9f3c9ef085120fdd8e3c1194f94b028176a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWCT52211848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e395f41521571c4339758263f91f162d12de0689ff4e54d1c62d2cda6de58f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWCT52211852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc3030ff679452081379a1a614f4e6412710dec0939eff2459430e9ff7a4319. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWCT52211859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb9ceaa2c351243bc1b15b72e8342b8ec22001ce4b65a96ab088c9595744146. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWCT52322834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17bf56d6af07687c600add954aad0e4ffb4a16ffd3f5c7e3f484ee6d7349721. 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/TWCC37000909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ccfb6ef5b0c75a7f5c4401c78c4d71d320e2a1fe48be121516d865fc98e489. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWCC37000886.