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 0x7f1dd3009515cec70c2320302874abb566892f7530b3ed7e3841af0aa7ac8a51. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a0e19c0-0758-4c4c-b602-44675e327564.json and https://artists.proofprofile.net/proofs/artist/6a0e19c0-0758-4c4c-b602-44675e327564.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 0xf7d93e661a5df5ee5506445df414a5587758b56d970e5fb3e2986c2ed017a45c. 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/DEPI82435017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a42d6444bc4037646f325e92ce30ddc113a2bf5dedcf4c9dd7ea0525670aa5. 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/DEPI82435018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7505bded0f8e172d47764145473f4e5f5debd506ea25dd912fbfbf5d262fe1. 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/DEPI82435016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba86e587d8d36d73bb6bcb4843a7feaa62df45a89429c5d508207dc8692b388. 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/DEPI82435015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10565a2bc243e782a401beb693b173aae6b6c896eb322882cb422c6078dba8ac. 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/DEPI82435014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab70ad32805b9860b857f9d04cbc33dc1f0401cf0f6c929e107e6595aba30fe. 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/DEPI82434729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0063dd636f6d86943c54f6a8041606cd3317efee65b01ebfe1aeabd5724cb411. 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/DEPI82434728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920ced1439d3aed909347f1488ec6e3d9be9fc860050a59e620b8cf372be6284. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEPI82434726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237542f8b42f6da046ac1195d788d92f0819cdb79af874460678c0d1d9ccfcd5. 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/DEPI82434724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6986508313f137115455eaee6718ada8dfe7f06d84e43cdd8f641655a4aa2. 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/DEPI82434722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e34565065419a66638ae3c798dae3e2b0470d802a7407a6412e109e7618838. 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/DEPI82433655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865ce9cfa4dbd3a2b3d74723ad9554233cdaaf9aeaf7ff23f06444791a7dba26. 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/DEPI82433613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d36a22de5f2b404d87e0ec75af765ea4ee0c172aa4b05175e98e6df86878124. 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/DEPI82433609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc145795a5658b413cec28c637fcc6662b7b109d245c0a042b48ab96b2f165a3. 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/DEPI82433271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7396550a3e7fb65715b7854969c186ba5d7eefa4d5798c0d2e75bc4adda606f. 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/DEPI82433457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4d52b5f861c1da65070e065fa8cae7ed98054ffa82a9b2a8f86c9c8a32fe8d. 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/DEPI82433456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7cb1ecde87589fdb24cd618f225e664a66aa195cd5f3aca5d9d28f54b25ece. 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/DEPI82433454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17776678b2b224a66c30219113756d9f7611652c52e1d5e3bcf865ba60dedf2. 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/DEPI82433455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db85663e4abbc1ffdc5659a6a49165763ecc0f1011e9a69f0114f2c29fa19da. 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/DEPI82433074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab07880810b53921ffd9083098ca8b6460431f1cdde87ef13c841c887e3c2eb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEPI82433453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a57efd0a4ad1de4319488524198dc16cdf7be8aa6b1bfbd2f12ec8fc4a8d5c. 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/DEPI82432844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bcdc6da24d1cd8d99d98a37990061b2676b6c2b11df52488069ee5a62db041. 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/DEPI82432523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ee119b473f79a550e4e4ea08fa3adcd3e7494a49e49dd28f3e3bde4c86452b. 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/DEPI82432002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cbc61098aa9a0700ca6ed2f187e8094b635155cdab2d0b8d277ce321d0cb2c. 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/DEPI82431873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75b90acfbcd0071c214c7a96c89b6fe4ee701af22681e0259ed1728d5c4091e. 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/DEPI82431835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe297a0abd8aef65e9658812e9c180b28e18800bb892c4561a0d88adf03d62d4f. 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/DEPI82431585.