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 0x6b589923b8e0f992d52ea858f516466c34d94a25d7c3590d7a6de8e7ab226790. 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/6f7ce5cb-d356-4e45-9c99-33055e593a02.json and https://artists.proofprofile.net/proofs/artist/6f7ce5cb-d356-4e45-9c99-33055e593a02.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 0x2f8ff509cf004d3b00f2065b9ac4fc1ae0f40140fa91b4f3d284c84b78d6cbaa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4R2129862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f641014c5181381190b63a86494d07e2060653574b62d3b549eacaa2ac43f95. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:19:29Z), 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/USL4R2129863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6853cfab81e606e63a7f597ba54f510b93c50a22388d5fadb75b4219dabf72d9. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:51:46Z), 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/USL4R2129864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddcd0f3835813bd77cea972f3044c0ed7fc664997e93f4df9ccc5f149957673. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USL4R2129865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9f7d1a426b248dad4ed735c92fae4185f589e85bc98ce9bfc890d4843d25ce. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:23:07Z), 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/USHM82248385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd1c6a4df52146a2dae92ae978a756405935a112111780f3a664069c15520bc. 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/USDY42387433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621221b2a85ed9c11167f7366dbc0c682776458bf34bf60784149c136d514cf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USDY42387434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c36aaab4c59ded0fe8b940b42d93c25321f5564300e4077fc2efbd40f918817. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USCGJ2386859.
Strangers in Real Life Friends in My Head
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadc1ee39cdb1bc372c504610a65ee7332d52f47e979f84a38182481d81d0474. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USDY42387435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a9e420a583645feac1937a70e57206f279e45342ca9264682669fb2ced033d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USDY42387436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907bdab82b5a3991bbd76400df5851c8db569e39023ae5432c7b072ea1010e45. 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/QZK6N2497276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7877869f3fe6bebf6f6fc32aecbfe69b60caa68d16e81c186a9fb6d631503a9b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZK6F2404992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a3e9ddbcd2d543df3ac7c837abd28ba3aa7a4a81cf7716356232a944677563. 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/QZNWS2430949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8066cff42aca304c13810b1bc27ed92fc2ba1ef22529b6c9fcd7a1f0dac4f972. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZNWS2468729.