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 0xa0404f235b269113423d2b60c6c53040059e047d873739f6c4417bad53c45d05. 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/55e66c9a-5286-463c-a858-0490408c9853.json and https://artists.proofprofile.net/proofs/artist/55e66c9a-5286-463c-a858-0490408c9853.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 0x50bfdcebc2beddeeaf19dbc251cdbdc7284492f37c925be722ce55152e1d7308. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZAKB2417777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0922518ad068246247e13bc52625a60ce1291c3ebb278ac3a0b80daaae45560. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZNWQ2100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bebf422679bcda2c9f3f4d6e71afeabef94a25a6d2295663841cacdd1ec93e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ALA092100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7a06b99fb23b8023ad95208269e801d98d6a846c12d5f4c53c770849af890a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ALA092000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7490b16b925e6d6fdda5326a2c4a3d4c35652d16e731bdb9cac74d50a937f5ba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/XKA032400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f176270e562696379ac369f00a204bcc6764ae3c2c1b67b383de9192ec6a1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/XKA032200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe335f12a65d255d1d9ed9079c3619136ea88f3554495d762d77ce73c9dbf97. 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/ALA061900514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d15b3f7f79fa42d7ad795c6c8b68415765ad1581ebd53aeee7d9ea51fa1c961. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/XKA032000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6d1bd5d402add61c639fea92bcc1ca57c134c5769c48880ca43b8606c53f55. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/XKA032000255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd1fe650690d748b8453c309badbef4ee05f5aa4c1bc1779adff1c1cb709cad. 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/XKA032000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f176270e562696379ac369f00a204bcc6764ae3c2c1b67b383de9192ec6a1. 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/XKA032200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c31bc9ee6d66cf0c18a55704a6522c298577b89dd537c760d51446fedb01c2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ALA092100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57443a2bfa0f8ddd06947d7386f2e6257eeefdba22a83b6f736bacaceb78a08. 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/FRX282164051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd824dcc101e0068895a6af2f74d34a52e9e8b9e61c7400463105eee0f1fb602. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZAKB2462216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6802c18cf49e396908d32707ff2efa2af7416f3e4f93971210a265caf434e2b0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0Q2415529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141755f0f4eceee943bd0eae4b09d62090c69373e05c3d89e8a573317b082880. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DGA0S2445368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b4b61a4d4644236f72d629722a10fabb21bc574437eef7a162e980626047c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AMA032000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6168859f9b557303a124a7549376200f3e237290c0ab53b127a9cc571ced254. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2404049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61574b2d339c954978078dd944604052a82890c17a9f59d0e2fc6fb0984f8687. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX7852200725.