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 0x783eb54c3e059e1ebe67e96b4abc2160ed11f872cadf8752bb27e2a5d226a3cb. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/846be66d-4e6b-4e66-991a-86f3d873bcee.json and https://artists.proofprofile.net/proofs/artist/846be66d-4e6b-4e66-991a-86f3d873bcee.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 0xe097b2266fa841068df5aa4d9fcff8f1cf4ffd516000c7f06f98b42787cd1058. 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/SEUM71402319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabce3f0cb543ff5e292af2a23004e4122e7744e04c431e5f301bc74d39c5181d. 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/SEUM71501969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640ed820f902b1b3fd99b0a11c0a52eff17d482a5d57a3ea85f040d597fd4f88. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SEUM71601396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b2048138e184a40a1400fd715364ca20c23bb7512adb72de7b6f5578d998e2. 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/SEUM71600758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed6f09b908e65e2aba90e3a9f794c30e4a26c32ddd6c67c12d9ecb4d9626a9e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/SEUM71700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d155df0ea7730efec5586ab9fe18bd7c051aac50b7f9f07dc8201d08d3f31e0. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/SEUM71501832.
Där på hörnet (feat. Mwuana, Samboii & Mxhxn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b475fc0a23f0f9c67c2fc7d551ee6807f95e19cc097179cb3e0e5ac94e1c4b. 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/SEBGA1500208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2260512a3d50f79d35bc34f22cc599e4514e089d214fe052e4fe728c5c9fac48. 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/SEUM71500526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b9701d626b248d11627b922718f95ae27356ac3db5800df6db712372693847. 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/SEUM71500758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408506e9d408a99610dbc4eb88a9eb9b14a64c3de98e2d777b42767ec466d0de. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE4DB1400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded181c0503c8576d892b153d24b4d9d9e90023196edd835c3ee5b007a91ee48. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEUM71401734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b015b05a926168328615cc6ea8a738e6ed4b02d5ef943915a7702c213d875c. 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/SE4XZ1600212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff4c6647a4b8d94564cf31ab079f437538655518c0663f09ded483c2446b5a5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEUM71402170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c396a903c4825a64acb523deaf768041986b504d643557ef37a1ce8b9f5d891. 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/SE3GO1500302.