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 0xdcc098f6725b988df5352c172bfdd0ab54320947cddca2ad27a7ab9b6a26de65. 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/fe3ebdb3-a793-4443-8fac-29f79dcbe931.json and https://artists.proofprofile.net/proofs/artist/fe3ebdb3-a793-4443-8fac-29f79dcbe931.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 0x52510fc6c489e565013e01e1c16dec47659145bcf62cc3127b57013fc0199fca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBZSD1000004.
Everything's Different - Calibre Remix 2015 Master
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe948aa3b7f7bb3e85bcd2d99fffa1bb10db1dbaac9554732b10679209d87cff4. 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/GBCJY0712503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6799344260a3781e97ce541b76050b34da91843dae0a9b3402a6fad19e82614. 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/GBYQY1400006.
Hospital Mix 1 - Mixed by London Elektricity
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590335d6f08359ad99937fb27b12923b01eda6a6acc1d6282d3e1f0c3dc21ea5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:05:02Z), 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/GBCJY0239007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a43d29079bd2df18a50cf72af285ec3cb3fa355c7f89288a4128ae05f98e160. 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/GBSV51900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326fda0bc2ebe27dd63e598836bf6e06663b1e303a29a3b2b9b6eaeb83cde052. 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/BEN582101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60037c543f01bf5bed1105c827f0ea16406256ffff21b1e221e5cb54e8be0f78. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKE3K1600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8511f751e5f73d3ae3c268d28ed03a098a1a5f775d7a827a5009cab19b5bbd6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBPWR1200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e058d508da9a0a6014f5f15a2901abe2bbd9dd7faa80b7ad8bea3adada7c0e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBZPZ0600010.
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 0x14c24d179a64ed72af8a49db3765f79bd73493f4296a0c2ac52892dd9cfa9802. 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/FR10S1401421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf295a827518ffeca1874e6b731be42b0f2e0d9202697a4eecc8d72c02ec73256. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBPRS1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe974a2736df859e752ea6e3f01da0fa674ccf604ea6119427ac4e199cfc87d98. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBZPZ0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf72d6d93ca838920e1131d28ea3e9348789091d74865dc3cab07de1fea3713. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBPRS1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b631582e8dfbe9d18ecb0611d7f5d7c68ae467112c8735877babe3d9e71f0. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DEBZ71700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefb3f745aa249f8d61c42957561ca90c2809bf30efb01cc3f2192e35d7c1010. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBYQY0500001.