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 0xf52027b5a25606f14f8bbc3bb9bc29eed8330e1250123e50a59bcdc32994cbcd. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87e37ea0-d51f-43a9-9580-54c0a9e07dd5.json and https://artists.proofprofile.net/proofs/artist/87e37ea0-d51f-43a9-9580-54c0a9e07dd5.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 0x13165795316071397a9d10cbff22320a90736b7f2cce96299f2a142376eee00e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FXR752400773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca18e2fed8d5b618d54034013566731ccc97b40eebe2e44de8bc754211d4e431. 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/FXR752400265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748b7a24bc9c013f4f509fd3a38bedc8ffc6aa64e8acacab832bee9e60dda23f. 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/FXR752303725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429ca83277d81f53276b3403fd451a9c58939cd542d5eaeaba08418714279016. 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/FXR752400775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6a8cd1990ddf5977dd07ff02ddcc9201341f840f72d4f76d7307269ba3db10. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/CH6542142835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1fe6fd54a4b5187b3675c31a9073852a21b18b05f1d93d0bbb03e6234c3b6e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH6542148644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b3746a52ba3a616ff71d2a13f4d5e12c25419e39b8dde11370bf43b38e4d98. 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/FXR752404625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca18e2fed8d5b618d54034013566731ccc97b40eebe2e44de8bc754211d4e431. 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/FXR752400265.
l'amour et la bagarre (Mila Dietrich Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b97292ca4e541e4d9d4b72c644fe084eff4819216f2d54354b21cdcf426f429. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRDKW2311168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cee9b57839ba3b2966fa7112ce04ae54fd690037721a5639b36b0cbb8102ca. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/CH6542328986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1052a99bb1baffdd22ad2ce01b5b333ed094c26e2d5075f1e78567276e5fb737. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRDX62210740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e39a070cc7cfc9273fa9fb873d6696a3111640b66711e5cb795493fab41fcf4. 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/CH6542246737.
Infection (La Croix et La Banniere Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3235e9b810ea9cf968c1b31386b3b2583377f11901243e8a2c93281c53ad202e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR9W12008205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f43d119453d5982682a497b3895b314556d23d0ce7a94b54e59dc6e43058a67. 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/FR9W12008204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75ab3eda1cd71e1c03c9874b3948c62decfcde0d5d31b6a20fad5b7d5d995b1. 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/FR9W11924241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bbb28faa7e2cde6f3e6cfe01e5f062e57a594ef958200da0bd893babc443e2. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/CAENV1984768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8d4af5bf5956ca96d80783ab87ed8416ebcc79066019abe8d396c91f5cee1f. 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/GBKQU1928770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7949ffb19a73299d93c7e2e6413615ad0ca4fee8f437a15cf3a2d1f5f7cadb12. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBKQU1886101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbe8059173adde8bef8f478acc0c0feee5da0f40bc2e60d6269db34f224ef94. 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/TCADW1864581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccaf8cf9f2f2c7debc39f3953c5a31d99572269b6782cbfd4b9b974e6243765. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRPES1700140.