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 0xe3f6bc3b667d121e71c21671f309b341adbfbbc1e9ac820e8eaf64c36265a231. 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/036454d3-04f9-4110-8d20-5296399c2792.json and https://artists.proofprofile.net/proofs/artist/036454d3-04f9-4110-8d20-5296399c2792.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 0x4815aed04988f2a0a79bf0979a9089402da691d093845d1f942a5d745f8c8dbe. 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/US92U1614308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4981cbddf78b54ce006bf537ea4df09b8fab5805f472b27700f3de980da32c76. 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/US92U1614314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3697c4267d9b34bd2e7c1ce69d6b10db822e67220fa0e71a88933f8fab2e6bee. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/US92U1614202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019ede58fc0d1606533458a97ef01b1b2c6e6f6182e742f7eefc12465eef10ae. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USCGH1919438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f3fff6515fbf4effec5b7c237cf30cf1b3cbf3e99e93b1ba7506fcfbd30ab4. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/US92U1907164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bb006e1e0d207e9e288e61b207ecaa1127ad21b6cd959cf0f9db491c37b850. 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/USCGJ2551438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7d1a77e9481c8b34b609a4ea557bd84cf9535a68a5bcbcd6b27ddac9aacbdf. 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/USCGJ2551440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaba0ba2c85deb05b7fc3417d112d587545534784fbfcdd120316670e1e5c8f. 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/USCGJ2551441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6f2c28030fb08134bf996ec6ac72e86ca33a1075ee656cc6db37ebfa83c010. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USCGJ2551442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2ae34c0a6b30d1f85d0df7e239815e1a678c020bc12b351d8eba0cd1823564. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USCGJ2551443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade56d2d5c01976fcf4caabc5cdc6cd7af2a076e425a0067de2a00ca10c3b6ce. 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/USCGJ2551446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0914645de8eb63dc52281feaa8fa8894674a5fea28274d52cf3322d4a0c75a06. 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/USCGJ2551447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8254660456a87037828e0865875f669033fd99bd3748e70989d73dd35978f0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USCGJ2551448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d5d28e727b9d849b6492c9dba72f6ef88d02373cc0f52aeb373ebc2bb31522. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USCGJ2551449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f67031239440e4bb37de3da15e1020060024a2b88048a31b9ef3b63253979a. 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/USCGJ2551451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65240112716eb0acf37ae041d3a9bdf0436ae87c8042e6e3ce5d1e121ecf920. 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/USCGJ2551452.
La Boulangerie 2 (La Fine Equipe & Friends)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122f8675ac5a09b6bef6368a5324eac20503f295628aa75b47b5f846a63faabb. 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/FR1A91100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb926878a5ee498b7cfc621803e90b6487749a005ed11aa7439d19b8c597f9a8f. 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/FRZPA0900610.