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 0x14acca5f0a1b33ae17649445e38745ce58905569d9d348531fc1a8b95cd43a67. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5dfc9a73-f811-427d-b44b-f7cc0faea2c9.json and https://artists.proofprofile.net/proofs/artist/5dfc9a73-f811-427d-b44b-f7cc0faea2c9.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 0x49da1dd77a7210c9c96e29d01a4fd34b6a4a926cef3bdea94791ec7fe4610626. 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/GBKQU2140527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8201b5a12f8796f0483ca27088d69f93a76705df21d04957314830dce8aba1f5. 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/GBKQU2140529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e69200c47472e5e5691b9a7c94c185bed8763ade1e4c2e02837d1ad9cbb394. 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/GBKQU2140531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fc8718c0632fff57a848d4a4ffe2e5170dc8448c33309ef04cd59706f747e5. 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/GBKQU2140535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a930da4f09d1bf781a1391d51942088e24f385024d2b982db152e1945d417d2. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBKQU2140538.
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 0xbe6d1e1f0beb613d61f031493029b52b64e0f9ce00d0c3904db95ed99bcf6427. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1601947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0d40d39ceaf08d8400776134bd660dcbddb8524c90911dedf9ddc2f2fb0e9c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1601948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a345f08b6d0bf60ea51cbd3262ef6cec599c61ac3a96f3d06c79432a85c27b9. 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/GBKQU1601949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebdf344e0305bd76163bb894871f3ad227662066617ff4f5353f017c7506886. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1601950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fba41056050a9d6ed27ad92ad331b338a065fb1724ca50c3d1be63e02421eb. 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/GBKQU1601951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f431143bc68ad345632c9c89c899b72accc6ebd5d15487ee11ae1c6d95f3b0. 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/GBKQU1601952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1b9945214e915525fe6bb696f6501c8de6c0bf82ed57e366e1465229ba5bf1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU1601953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f063527a353ff52a8dde2a153e6f4c25d586a28e7c8ddd2b7b34806b8ec27f. 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/GBKQU1601954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299dac431769fd9e102489faabf37e925db39f6472e52cf430d5de2e7f49d789. 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/GBKQU1601955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df09cebf2ba244dce6e21b573ef33cd501f112c039a7a0bc592669f359b784c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1601956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bd3906dfb53377daa267713c42007221d6a2d1c90de34d910d8ad7ea281b41. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GBKQU1601957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c59c8346fdbc5cc2a238e5c863ef9272daacf6bf5a80f32bfacf760c6e208bb. 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/CH6541661879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37d87981f72f3cf30cd945211ff1ebbffd3d3bedb3941bb5f9290b2e005258c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH6541661880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca09ab54c9aeab0e8cfd19dcf306ea5a28d6630b72ef0152d602549bca66bd57. 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/CH6541661883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee199ff6837ed1072c4fe79f5b85ab3a619f4aa6d51c75d45d1cd0cab0ca4a1. 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/CH6541661886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b55ef201e00d0b27406a5cb5ce6507209bb0f59e1a6cbb9f50c8b7c87b71418. 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/CH6541661885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1eb5f34829e6ccae4c9bf34673983e392529ca1c789fefafe5ce3e5265e6ab6. 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/GBKQU1755547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d1f71c85ababdf342eb98734579acea21b879682e061bdd6373554ff9f4a06. 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/GBKQU1755550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8542a3d9561ad7568d00b99dc21c648dfbf8500a3931ae2cdb9a634030ee8d7. 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/GBKQU1755551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a089e8b367038f93ed556dc5b8ead80dfa405c6c4c8d2267bdb903b6941b90. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/GBKQU1755554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa736188165b3daaa94b673e17b8bb4879d8792eb8c1631b49e47c42ef7bd3961. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU1755556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141de08a3b51ad0d3e258c7f1b76ed9ec9233eaf162cc0f638c2d62687c94857. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBKQU2149159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4e47f5c8958983ba72ab20c7d65d8a2f52e784b9a4b4a83902d248077aec3d. 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/GBKQU2149162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6502da3fed3d9d37d3ef2996c5e37a07ca2f644ce3c29b2d33f161ad83d194b1. 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/GBKQU2149163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285d6844930c8520a95e962740d71077bf06e78b9f17d6ee9c67b19afe80e628. 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/GBKQU2149166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deda6314e7d83c9a909c76848aa8325beffdd6838e53ed440ea5bbe09db084d. 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/QZKDK2073909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea57e7363d76f840c8e0965b688e595347ed8b7a034da80d756abe41198b25b. 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/QZKDK2009834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd313a54465d059c2258219420e18b1191017f773e9a6fbbf3ebba1b18fd8a0ff. 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/QZKDK2057837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa598fb6022465fa625db56e79b69910356904ef336a6f2abec0fb80d75a0c8dc. 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/QZKDK2028578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddf8a5ccb64f71def6eec74f51be40dc167dbd0ac206ed4353601510e0018bb. 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/GBKQU1512134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8033ef550cd6720cf7e57025db88ec615f35e045c01f0761be0ebcb77cddebd. 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/GBKQU1512137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89352fecb93b0bec95d489bf2c813877407c80dd487125cd3ead0f8cdb32bf2. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBKQU1512141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b301bf5da0a9bf6eb6ac1a8ff5812376fb3759d9ba9f323efb034c7233c9ea5. 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/GBKQU2374066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8905fb523f6ea7e99ca4c545974d456e1ab803f572a4121a85349103e2eee7. 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/GBKQU2374074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d6b2bc94ea871dc2b7c9c32f76dac55c9998700faab12fc1e1b49455cda237. 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/GBKQU2374075.