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 0x5cd60355bb59c33f03e8e9d79c76ea4c2eefcf59e972450b69d760e0bb69f7cd. 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/7389cf9f-b167-4834-97fd-d323e7ff8a81.json and https://artists.proofprofile.net/proofs/artist/7389cf9f-b167-4834-97fd-d323e7ff8a81.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 0x0a1385d2a203cadf9d1f90edb408a4bf183f087f8f58c3e6f0e41080dd0a98b9. 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/USJ3V1815865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b2a80de3ebd7219c70d8b9a03aec9ee7a3a79b295538cf6a6c194d0ccc1cc6. 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/USJ3V1815869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5cdc843fe7c6db021a77069a8304dcd6f62d66d9af59eb4d651b75d02c968e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USJ3V1815883.
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 0xc4506033b3c483b543a1f08ba7e29d91f27c75efeb536b43e94229a094a50d7a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS632128668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b3ec2fdfe6ce8c253b239eda476525b8ff6b1aa5f1b04c2d1a939bd8a2cff8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS662170864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e208fe6582c9fe7e46ba78fab8d29dcbe30f951c8abd6940a02b6fe3d971d0. 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/QZS652100798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77006e3260c659a43927ff4551fdd8249c5d30eb58425a808930e63741858d85. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS652178665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a4c683bdf11538324a9af02650731c70c020e2c4f8dc1ecf17df9f3ae92f19. 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/QZS632143586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf669b560e6fbe3b202cf02239466e4b7c5110092df5596a01707f7a8a7959d2. 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/QZS662159725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cccb952f01efdf67193950d663e8cca051b4284f864eebceef55ff159563e9. 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/QZS672190032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eabd4ba4a70d64415b7c41f53cc87f3ac488852495b4a67d841cd415f2fdf7b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS672166961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2510ea6c63e96b74310d50148d49c480ca88662b4cb23ac8faa07e462faa584. 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/QZS672139800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaba807e2d816ea9e3eb7d7659d2fcdb502ade1e3aa1dee5a04d6c7368e3729. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZS642176273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f94d7c8a8f27c5a53e507862e18e1bb12b58b00d351bb2b38979e9e9acb618. 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/QZS672100365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c0f7b6dc5bd6d5e03a857ab0b2bc9d1a131be17138e8b6826eeaec9d0dc566. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM42K1902929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323581d18a6c734eb07dc91b5179393467a7678db4f3a54c4877fa5517ba6c8a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZS642102629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28483a4877c00201f83e0005505803e96ba95625ade996111c42d70eb520abc. 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/QZS672110778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7d8cd03ab4a6afb4f20998f0f36aab9e177bfbd02695e6ce6e3b11528a2296. 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/QZS672107054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc8a4f8e35083c07be48e885f9752f701605922c079cc086ba871a2a390650d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZS662144408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72607cc43e7ea163146a157aa28028ec00a68bf5b0dbb39d6e26a1fddb501511. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZS632188115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63022e19546bac700943e65c5e43e0a9850619536315af95699f768aaee2efb2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZS652183406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0338948799a9ffadebfb8308723606d25eb6ac7861e0287617c604da9f5673e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZS632118934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf09867dd61081e1d235ed756c7ff9e35813e0fa5fa3d6a9860960cc0bc9843a. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZS642126559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73a3ebce4d93fe4784b90dcca5757ed15644d6e6073b7b5172f7431be2aada0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZS652154548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b66b83368b30cad00319f8b2a9f8bd1b8c8c1f1905bbab445851cfff5fffa3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZS662141418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbf8ba046d0d67d98eb50f7915e05b8d426a84bb7b14f616a0e491abae009a2. 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/USJ3V0804010.