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 0xf371fe0ac13abf7fec6fe8b76805ffbfbb2c16a95e78d8392e62d1dcaf21b5a0. 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/23a4bc77-0275-48aa-a5cd-a3b453ff04a1.json and https://artists.proofprofile.net/proofs/artist/23a4bc77-0275-48aa-a5cd-a3b453ff04a1.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 0xd7f478f1090304724d2b9bf9a419afe45302b6e48850c32e8a47bf3b32dac82a. 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/BRAPI2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4e5eb4f71607b74ca0186439f674c313431bb0688b0fed55ebf9ddbd965dce. 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/BXJIO1400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4df29749bc7372650b5025bd1e9a7b411bcdca2ca36538a4760504dc508053. 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/BRAPI2000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd3b54689562b575f55af0b7cb495f08fc2a5d83aacff954dc06cc49ead9f6f. 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/BRPUI2100326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97b389ec7ede9d35fbae0ec68aff89bb3dc9f0cd23de45f905e870c041725c1. 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/BRPUI2100327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf54efeaf53b85789c051a414271df958b82e125973a6f773f7dfed17a900ed. 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/BRPUI2100328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3fe6a789bfce9b32ebe7c54c6316682264137be2c57e809686ca7598f285b2. 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/BRPUI2100329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781e749d8c91b63631f52f82828efc151267f23f734e33b704c1c724759eb305. 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/BRPUI2100330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685f7dc2b95f90ced90a40576bc334fd4bea78d204bf3fff2c2f59a6bb034c26. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BRPUI2100331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0c8b5a9d5d18563c24fd5133b836612a1b80a482db3a86fbea52a6f9566684. 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/BRPUI2100334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f6cf5212f09b5d82b4ba0d880f4dedaf5a95c03ef1a9a0877a015fdfd4e860. 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/BRPUI2400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889358eaf5764427212dd7628e2f564f1273c45cf4a439d42c6fee0a432572d8. 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/BRPUI2400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37b547a1d628fdee20d1ff379ce1758fcf09448c612ec0a4de3f895901335ac. 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/BRPUI2400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9732ebc3f0f29fe5653258b7c8fc0842b3bb4d82cb7ec96ff03c1c64c30c50dd. 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/BRPUI2400234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee69209974ffdb75135a8925276f27a07626010c28cffcab562df3c101a3d048. 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/BRPUI2400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb082d88402d8bcc27fac8b3bed1bf67de4993c926b05033c1cd6c3750ec38ba1. 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/BRPUI2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a4b19aa0de730a9658eb24afb96a2ecb0cb67f3330ade30fa6fb8d9bc0b99c. 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/BRPUI2400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889358eaf5764427212dd7628e2f564f1273c45cf4a439d42c6fee0a432572d8. 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/BRPUI2400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321bf3ed0942793ba8eebb514494395a72cda658e3237d6ed63ea451a4c6205e. 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/PTNO12400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81bf485c4c22b8fc9b0bbb0a9ca29933bc09e3f02dfc26932a334bd14388ade. 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/PTNO12400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019f85b2d49284efa1a06e9eeafea6c7f66d6a40e95d5a8258361b457e723948. 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/PTNO12400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a78a6a053948b1e4f4f609ab2865cb947684e8bc9fee614c897d53bb3b82dc. 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/PTNO12400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4227508e1fe80bd2cb03d0cd1ddf36035c0e533c092506f985d7411fc44b95a. 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/PTNO12400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513be0f18840e1ce7302bbcc975f6154cc5159aee6ccb95c1e402f88b205afef. 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/PTNO12400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d8924daa0fa18b9c861f6ca36eff4850eefd6bbdae0b27f25ccf9e1864813e. 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/PTNO12400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1724e391c841d8a7f14e52835583062fb350416a70ea40ff38176dc6edbd93. 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/PTNO12400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768ed472019e806f3ab5d7d8d7b2ee24c7f96407c58eb9e3ba0e21abfe47e1ea. 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/BRFWL2400003.