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 0xd58c0617b8c2ac9a53c4dfeff2c7f1a311a7bec5fc97614ce2fc184e088be5b4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46d6ede4-cb6f-4d40-8858-3e2117dc98de.json and https://artists.proofprofile.net/proofs/artist/46d6ede4-cb6f-4d40-8858-3e2117dc98de.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 0xf12206a395688181d42106a3dc0df9eab652ecce935847e06228e6211658484b. 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/ISC109002704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fdfe1b4e932d90bc7162a314dca5dfdec81163fb71310098d4ef8c18fad724. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:56Z), 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/ISC109002705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccecc0d55c427d33f9b3851ec152e2ed45d971f0f3eae17faa99202cf689795c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ISC109002706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaadce336f0464c05fef933f768c5deebd19265a0ca36b386774736c2548c67b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ISC109002707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb617b2b2db408e207c68c2bb7929f41aff3e6874bc403e0b3554ac48b458cef. 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/ISC109002708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df52805029cf36823835643f970df919ec4e25ffddc3fdeaf905ad503f6238e. 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/ISC109002709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a08069d178dd0b0fe093ed1d947637be2dad7c6915d097d4ece9286e7b6b50. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ISC109002710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ec3d8f988df03c5639849271dc6f4f6eb72230965ef0a9659058597984baec. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ISC109002711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220e2237ac612d1ad2ceed4791a80dc3d3adf0bb02ca8d5154cf30f4db52ca62. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ISC109002712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca767301b8f60f90dcfc4aa091f5a02dd287217706d7ee107292d78793889471. 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/ISC109002714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08fcb064afed715a270565a013ac93c846054281e14f9093cd853e583394237. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ISC109002715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaa47833ad5869b5daeeba2c35197ad899ffcab7e586dc68315a31b553c34cb. 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/ISC109002716.
Björk: Vespertine - A Pop Album as an Opera (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbffe44c64667ff5d197f02a9c33d8e58e4a9e221382abdce5cfc79b39972f6. 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/SE5K61600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8d08fd1d234d93ba2da18830c5ccf8c1681802fec9925060642c817e64ce45. 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/SE5K61600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88272b34d94ee1bc156733adab4576fc09a08f4eec067d55ec1455cb1b9f719. 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/SE5K61600109.
Tavener: John Tavener - A Portrait (Mccleery)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf954dd3a0bffbe88fa25538ea4bca32b51ab67d428e2d6313910fd9694b997c1. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/HKI190334102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dfd87272d854981780ea14b422d407b914ffc12db362a2fd2fb8f2c735ba85. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:21:44Z), 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/ISCRU1000185.
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 0x1180da73f939bc90fd3f3b37761e50d36ffe83baa2c315c6240b14c059201027. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ISC100201106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805978d008e2bf275a5fab80f8266c821d320aa3c4c497e72b3e127ada34a718. 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/SE5K61600106.