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 0x4320e379d4e3db81e4181198302ac7847ae6a9f6d19bad995be23a063e4f86d9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b913e83-d24a-44d2-80cc-8b653a560587.json and https://artists.proofprofile.net/proofs/artist/4b913e83-d24a-44d2-80cc-8b653a560587.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 0x920b7650b54c4947c0c01d086fd0c1871970e5e47703eac52f0e880ddf4c9cff. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QMFME1921845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f7880e419bb9a4627b1046b41ba495cc8ba5247aebc5d981c6b4a3763e4100. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFME1921848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8890be8cc260fe3308e1400be5e17969a330dd7c94d3cfd91e3be30b604b48a0. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QMFME1921850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13714c84fdc07afe96c618f8ea30d4a1ecd359bc90f485290348e41ac06f38b3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QMFME1921851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebe55e49d81c9dc0668a8a688003e869eded3a163a635a6ef37972518265414. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QMFME1921852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0eb74a4e913a8ee6a23204d6ef1e1cb73cf61981ec0da7e16fae294a7c690e. 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/QMFME1921854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045387c6d12da909a457db588955cf587183334b9428b41b40e8252d92cbb292. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QMFME1921855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168302362fc1ae0c025109d8b8498daa7df55ad61e855420fac837c7e44f5be1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA011520953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2fa4c7e6edb6f7118cfd037dd6688a2030084fa5f64a7a25ad8447ad43e033. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/ESA011520955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb809944ab239077fa26400bd07346611d980bb94c45df0bbedce057f5c84d3f3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ESA011520986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f70e4e9ab1f731d7958b2dba3eade25f79f8ac860e2f225a35400bfeee0382d. 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/ESA011520987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e740adf88281a04282dc481d26f39ba12a297f3a8973a9c838f38dc1b67fe54. 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/ESA011520993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f5ecd5bf1d6d7d07e3fd0208b8a8fc92c2b2ae9bbc80080613cae9646b638f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ES8242341915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f1800ba325dc2bce4435c686bb09451d730e5297750ede62d82e4b4a4dde6d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QMFME1921857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebe55e49d81c9dc0668a8a688003e869eded3a163a635a6ef37972518265414. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QMFME1921852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f5d6ede069202a736b065877ba20f1aae1c47629b2d8b61b62b92aed15458a. 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/QMFME1921847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa8eb6d895da156c05210c3e5a2f1875952513939aa423f26abd63420ed57b1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ESA011520982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952f8e98c6828446e01a8418f5b56e012dd4b4904ec216eba8401528128309c2. 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/ES8242341912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e990774ef26d16e73158ea3749f455523c6f0e28a4c963dd948c698134d3ef. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ES8242341914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e042475bb1377fc3c0c817b2ad440f0717961d9679fad3d87167f11f402714. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES8242341917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77286bf2826be731b26ff685b7ca27a38b822117cbb149c260ae90535ca7fd1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES8242542401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899ef59047ed8ded0c7658356df6b1c9d697d7fac62c56ac20ee0a21e333b849. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ES8242542409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e130fa352f33810c171e8f5205eaa6e3501efc24c3c850fff99c08db6eafa82. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES8242542412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae80b01e65fece1454f7e1733af1aa402193c8f8020f7a18d7143195d53c0c. 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/ES8242542417.