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 0x74fae60a66965c76ee8ff84820bdf2ef1a50180498d728e8241096e55ee9787c. 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/41e97f03-5007-4b30-9dce-1f7e1826d87d.json and https://artists.proofprofile.net/proofs/artist/41e97f03-5007-4b30-9dce-1f7e1826d87d.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 0x6a03fdb2a3dabbc03a11a9e511e6a24291234269bd3d9e35ab965081e6f16424. 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/DEZ901601249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7f6012f65e0871d9c231c4d3e2e17cb1d850aa959003ec3a80c1c0255253c0. 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/DEZ901700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe192ac7b43f2ce29414f156bd0d4f1f536f4555b4aa18a7125f17e05ff79595b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH7812373157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79541a9fefdf0dd7c247be312bccb7596c80914c2c25f995d45d8ee2b413e464. 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/CH7812355039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa857229971f6c3ad5d7c1483f4f26bbed49a7e176784d902e2c3b475b8fa0f89. 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/CH7812342730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dab92f8ee72fd22aaec4c6b1701824f79b79c4db3c991662a20c1acdeb5a12. 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/ATEJ62200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720c5b5e2b3b4ebebd892c6cbcbc6ca92f80d296d3b3df9d8383edcb59ade9b7. 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/CH7812217375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6039ae4a8f369f354209cb6f1d44c119f222cd496ce46188fe32b1cf87d089. 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/CH7812104816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98ef0cba8788ee7f6e2bc330b0095a880078b8ef48526737b1209130027c70e. 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/CH7812103836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6874c25e75c8dfc2a01de9e110cdc39142ee66fdc29f16f6cf7cd79de6240419. 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/CH7812197916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adf3c0622567a9cbf04693fb6689b8db35d8b22c48b2d6baaf77baaca1ad2f3. 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/CH7812548257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bbf211bfe697d9d2a84f021c3a8693daa29c9fd93978ce5a4e7c866f36ab47. 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/CH7812543278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad80f56e539e18170bd468c9b9c28ece99eabae01ae8ab0cada8d174e2121d11. 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/CH7812540243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1745c92d45dc3e5f12dccef044df12e8ed5fd9cc197111840e56af1dabae86b. 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/CH7812530603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98189b8d7b3f02546bd43154dd65c36fc143aba74a6ff3ef675787ece5a76c1a. 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/CH7812422134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657285acab946f7ff5df9703101681aa75ffeb1a1d17d5becc048e953fc7c2b8. 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/DGA0L2425571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12b21df0cb720d482481c947ebd28a3fb703f206062000e7b15ad4e7c286138. 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/FR59R2032727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac225daa615040692442aa3d9fd94f11ef153e9dd35905763ef21d39c414677. 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/DEPI81901006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e71ac3725f48e35d3b11161a13977ec4be16db2630f3ce09cd229cda3762e7. 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/FRX282092446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f89f29dd115af1c10c68a9628063f9fe30e7e6f74aae0144250ec35215039fa. 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/DEPI81800297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d58b7c1f8193a61e5bc4b18226989af7b29245323539018929962cd07d55e1b. 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/FRX281929173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5131f08b25a92944987fa2dd540c382a43dd04c360e97fffd710fba3dd8e88f9. 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/FR10S2097208.