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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dd078754d5ef0f79e8ab903cdd28a709f9f268b99ede84f8fca80bc3f87594. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff39027c-afa8-4f13-b495-b3f039fc452c.json and https://artists.proofprofile.net/proofs/artist/ff39027c-afa8-4f13-b495-b3f039fc452c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb174b0f3f4fd74dc22fdeb9519893bf9cb6c9e4357d8f2e3275d5d485f2fbfc5. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:48:53Z), 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/QMCE31801624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a624691c7e0a9c25eda4c9339f4a2c80e0fbb2cb3a33f56776f29f79ca8aab. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QMCE31801659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863a3bf2f1bfdfe4d16532e9ee11bc0a3fbb7e9ce69c4c5891ef56d9bfcfb3d0. 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/QMCE31801660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169c9ad229d1b369a1f4cc633c15715d3424af718aafe148b59970173e6dfd9b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:43:06Z), 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/QMCE31801661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d460c10e9cd7f60f13936314817d15f21c67c66217a74531ea1647f70443876. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QMCE31801662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7802820ab5865f35c1e6def5c7cae366652f485644b31da901dea70097b4576f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:04:16Z), 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/QMCE31801664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba99dc2a6b085ae13e1af94975bb7cccaf68532625d8e14e6f1f93bff169e85. 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/QMCE31801665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28c622bf0626b1a5f82d5e9ff042ec7c0553693248d691a6f4f72b19be4d8e5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:54:43Z), 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/QMCE31801667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcb2fbb517fb227d9d88f100bc5db31fd720ac886713bf53cad331d1580158e. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QMCE31801668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d2420a8a2beca451368a2033ac486536f86bdca3ae85250a436cf3aaca5f28. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:49Z), 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/QMCE31801669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdf14797728ced8249beee9dfd90ec492f569dd25c82f7f7b11d1bc86136626. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMCE31801670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b756daf9bf92c0d44808db66aafafb5ffe9f5c48d5f4dd73b5271e4ba3bda3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMCE31801671.
Seventeen - Recorded at Spotify Studios NYC
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0027a55dd59ddf4fc022d181a6818c68df2c37614814eecf57a9e9b266ca5d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMCE31802112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec622fc13a46be2afc0dfd390d13964138b15a72dfb923bc414c9fc2fac4cac. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZK6N2245053.