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 0x2a9f43fa7602b7eea86f31aa045aeca3e8bf0928231e33f99bf4a001b8e788ee. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d23510f-c0ab-4488-bac5-8625cbd3c6fc.json and https://artists.proofprofile.net/proofs/artist/6d23510f-c0ab-4488-bac5-8625cbd3c6fc.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 0x2b8ee163656d7ee1963cb7b5d197c4461de850411bb12401ee6134ac82fed8c7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBWUL2487594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71c364af9dd9cc8cadd86be01f8d1ec19155b3cc1064a0d8fc822f15c166b2c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTV32492274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8edbbe23d0398d4fa8e434806a273791f48acb572fe1d3a279a2f1aaf8343a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTV32492277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee929d11afc99ae452facf6e98a0437b14a15880519062fb73e0471337ff39e. 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/QZTV32492278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d56390fba6b763904ddadb92f37463f3ec3962c73677fb17995bc4bbc4ee69. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6H2563447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df6aa5e8ece55a2954cc1ba396f9d97d4303d272797b19cd7d56f90255d7446. 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/QZNWX2577570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f8c7ad3434263282b693586c7654de2e974547ec86ed1e6138465db2102d8c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWX2577572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8ba18edc29876a98a02250edd40c146c6dd7ccffae13f8783e604b7ddb477b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZNWX2577573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2189c34bb0a232a30917295b9fc09338ad09a0eda46f3a15f4de9e689412edb9. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZNWX2577575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5957764b7a11f8396410befeb58a894a0fb7f12b4f4a028a43b8224ba96746a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNWR2507646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec5b5cd6e69196819dc4ac6f5531981baae30c09bf03b7ccba222d2f148c4c9. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZNWX2577576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0793661884a1b5decbed7326d2284bec24119159ad91c589f5167a106026b3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNWX2577577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf190ae78f4de776c91675c9f55dabb9858ef6369fc502675765a5ef2f909dc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWX2577578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757eb6341858455255540e87acbe579560244850040194717e5b698b0d8cee58. 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/QZNWX2577579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a44eb9b148391d4e038598f695eb1bb7dfb30a695a8ccff5364e2f4e5d0f78. 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/TCAGW2390920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2f48dfead144ea5f7c97f95e0da979b2419843bd071b14e58ceb90e23725d8. 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/GBJU21700365.
Music For An Imaginary Fashion Publicity - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b23572c7c01e6133167163dba12c7d6c1eec089deeecdbd37ba2bf295ee1be. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEG932100743.
Music for an Imaginary Fashion Publicity
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2161666f664492ce7ac0a8c936fffe8a8b88e75b91b27d41fb90c618ff61e19b. 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/DEG932100739.