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 0xe76a100044432b409766dad20f7286dabfd70721d5db7ae6ad9fa7dfd152fe9d. 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/c7bd6eb5-72df-44aa-b3f2-f1f224d15888.json and https://artists.proofprofile.net/proofs/artist/c7bd6eb5-72df-44aa-b3f2-f1f224d15888.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 0x49d701c96b97c8698e5df8d0daca50658cda3580a768fe10cb8bcb5998285fc9. 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/QZHN81996712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af4353343aca09a8d6ed6ac1bc3df843514efdec70c3ee255db8b7d427ccb04. 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/QZHN81996714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40b846740f0ef1e6e7f5a23974ff939c03d2acda667037ac9b4dbe9eb06352e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN51922700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a80995ad7589251b80e8f16fe87524e0b3d730807e01cbe28d0d1ba9d009d25. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNA1936410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b8c684668917e28c7390f0d36e0791f79b948bccdcccb0e86d16da7d021359. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:12:31Z), 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/QZHNA1936411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe367710154be2d088ef548e2d8f90296674d47806625b7f56af0982fe4adf50e. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZK6P1912491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cb442bcff09f45d7e58b4b3bff48820388d2ff17febf52f68ec5c06029f9c9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6P1912492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3701fff4bf3adc3369751196b630431ac9e2b38ee2ec8e3afa9e0ae9236289. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6P1912494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aadc08569e29b283c81a0808962a7da1cf544b91dd6f885ca554fbc563bb11. 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/QZES52031906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d703ee92f993fc90f0fde1c5def2259fd5c4c9d9a78bc34dce346d884eccc1. 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/DGA052088560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dfd972f3c1ee25b8d009fa71627a14471ba222843f52060d797e485f2bdf7e. 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/DGA052088565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5a0c720fecbaa9a443ade0b4ad2bec219e581cd1efe556ec277d3bfb0f1b34. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DGA052088569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf40a2c25d6eb5a4d5a3e0533d0b82a0717358f1ad1cb1e8b334491cea66a88c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:26:21Z), 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/QZDA42283453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75489ae05005baeb3bc25fb0191a82c5978dbebe95faf12ae4074638f12556b7. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DEZC62336346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc780b9b22fac4d322698e9bb78b44997e30f68a493c39cd4b95cf73bbaf1c0cc. 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/DGA052443582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaf8feeb381b1895c962c5b78052dbcd9d90cb9f8fb87fae60d1b63216b7d0a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEG932303764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77df9a0885e3c280ff4d453d9855d58f70e673fe5e90869929093dad3ea0fa34. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DEG932303760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d63255d2a5998717ec4126cfc812db212623f08af581b12929b4c01313e566f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEG932303763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8173eb9f2895c0324e3e905f6b29b3b2f5c4000e424cad75b2597675397cd15a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEG932303767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe0a8da739e5244d1b67606c67dc68b502b641445b5dc960d0bda61376bde66. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEG932303766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856cbd14e0fd2d54de83f8b4ca21b89d4d108777d36045f00de3bbb0be5a04b0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEG932303757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dd91f9281ea50fa54216e6b48b7199fe79e11f8b37ac3d3d3d2b4382c74f61. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEG932303762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543cdf5ed94623c791684e8deb68ce60c2885cc8d5fe0a601cf324c84b5dda67. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:30Z), 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/GBMJG2512637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97817edb97ff4bec4441e6beaf5c8912708e9dec4c41cae7fd5b3a9b6a85276a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBMJG2521005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec4d5db3a153443b292737452b5f8eed6323bf5d4aa42f1c2e4e85baea6a75f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBMJG2521006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543cdf5ed94623c791684e8deb68ce60c2885cc8d5fe0a601cf324c84b5dda67. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBMJG2512637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba39e5b7e09a3acd8363a4615065b4feca9a59d02840911b42a5fb3e47bedeea. 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/GBHLW2003694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3c517c3b63ed30623c9147fd90f3d2ad2534ee5cda8e9aca64229d4927a7ac. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBHLW2102119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1665204e06d80588ba50429ad7db6e2cb1eee698455d4efccd423287fcca689e. 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/FR96X1988653.