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 0x9107d73730e7ba25f5f1f26020780f4db82c2dbf0e02a97153803261eec85602. 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/1bf3edf1-aa46-4ab3-82c2-c6b4763ebdb9.json and https://artists.proofprofile.net/proofs/artist/1bf3edf1-aa46-4ab3-82c2-c6b4763ebdb9.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 0x64360c9f3bb3dadede99cefe34fdb7df9e3b0d08f54fb769da32b70b2fddf00a. 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/QMSDU1400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86fc12a1a221f3acf17b235e2395e54d6cc503af75ca482c120580685a605f7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QMSDU1400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddc1d08056dc2fd31a83f791a3a27f14928542d647d24c61d1c0ab48c21cadb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:25Z), 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/QMSDU1400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64360c9f3bb3dadede99cefe34fdb7df9e3b0d08f54fb769da32b70b2fddf00a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QMSDU1400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddc1d08056dc2fd31a83f791a3a27f14928542d647d24c61d1c0ab48c21cadb. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:31Z), 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/QMSDU1400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6cf474a6e3e28555c3027455367774278b8068b45d1bfb868c6337bc75ba19. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:34:48Z), 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/QMSDU1500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abea4f75c925e4a3972a20287db0bfc27984e837f8857eb3e2482f09401f8ea. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMSDU1500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9027673b4432466e53fcd4a516e45dea17b53f2fea89b7864844198a85ce370. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMSDU1500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe77d80bea2f9f176407adfa36842e0919b8a8a806364fefc18c82c03901f4b. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QMSDU1500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eb1d6acfc6851498871b38848cc852dcc0ecb7c8b1b88ee870eaf3116e36a9. 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/TCACR1607945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc726a533348bcb40e11e8f6f065118463b56c658b210cd191f2b9e46cceb92ef. 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/TCADC1763778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2787c1f78f5f67e095de0e28711fbae631120d08d9a18ea00cc3e9d0f3f7fa. 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/TCADI1764274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30652ad5e78f204b52563168c4e72d6a27a36cd57e2a77a53fa05f51fb911c89. 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/QMSDU1700238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d175ece784ab7c3f0f7216b92cad579760f17d8cc41654b80e3417424bde624. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:19:13Z), 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/QMSDU1700242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fa859cbc5c431dbf25b04521b05c6d9f6651aaa19e90ba3da5e7b658fec75d. 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/TCAEO1966251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363183f0e4d41f7b36efb920700d6bc845d63283dcf4e2a9fa34c60782fbb1cb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:04:15Z), 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/QM4TW2121478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cd5df029f6287231eaed95ea6e0c85f78d2b8d8d2f94c87f3d493f829c3eda. 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/QM4TW2121477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69335d9d55d0cb48b7fa3a5fa93474786cf24266eac9d49d68bc601ecaccb174. 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/CBAUX2512202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d53fcbc8580ed64e44fb709fb292ba751e9eddd92d0f7f261141208631cc96. 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/CBAUX2512201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0665b03474890a9a0d79ea842432efb39bba103f1bb25eb36e3c7637e62618. 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/CBAUX2512203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f90e8dc40dcb0a9466b3a26ae9b40be72824a53afe05906a9ddedbd34cbcda. 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/CBAUX2512204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69335d9d55d0cb48b7fa3a5fa93474786cf24266eac9d49d68bc601ecaccb174. 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/CBAUX2512202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf46e0a10bead39da6ef3682905cdf5a654dffff6b4d559b0428823856b48c80. 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/CBAUX2512205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16de2fdf913c1b26fa340f75ccb7004a8594e11c32c6727d02be5dc507c45c28. 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/CBAUX2512206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f69584b6b0ab66c2cb36c8a9469989d0edf6f8257372368efd15bd6c3d3e584. 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/CBAUX2512207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b811d02b2834628579fedda92e98e01a53ab78df782fd5ff32172b2f8188a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2131903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f7da25e1a66cf644a6b1527a31332a229a4c04e3d518156d7796ff577e937. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2131917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ae1489c70b15b326faf4a921e6c16c8983a86ed507472bbec4cd247f2277db. 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/CA5KR2402365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebff238a378fcd47722a723a8c894f2bc15720ec7c11d301b9db546bc90f5d4e. 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/CA5KR2504650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebff238a378fcd47722a723a8c894f2bc15720ec7c11d301b9db546bc90f5d4e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2504650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc7c8c9b1027c5c44ea9e4f943f8485883ef524edee0ec72e8aebefc1980d92. 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/CAPGD2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3967769fcba30e3fe35c2790d3013660bdb71b2cfbb8efb31e61b02c21a3998. 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/CA5KR2017135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638170856b0562e2dc99d0c34227951c739fa83f5ce2ae8790baa902384bbf7b. 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/CBBWP2200001.