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 0x0f7e3ddea77de49c5012a8ce56e401d6133ebc2fba8b3a91ac40f49f929a5d8d. 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/eff01651-8a7d-4db2-b444-da8e5594ffc4.json and https://artists.proofprofile.net/proofs/artist/eff01651-8a7d-4db2-b444-da8e5594ffc4.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 0x585e2acd39edd0a1f69aeadf4fd4be89525fd6232c1a0d90bfb085fcf0a35ad6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIS2446222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1e765c8d0726dd2f799ce3a673569601f71d244ae0508323d1c5b63360ca90. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAIS2446225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb16e07a9b85d7168fbaf23db9feeba3cf3768b5d44ea77b910f30a1f91cd53. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/TCAIS2446229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb66e00c86eec014de82d240880cc1b398f0e67a67314806f4ec49a2103fb4c. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAIR2446233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc7af52e1168fabf6bfcf5b11060115e7e963dd67af9dc942a722b6f9e3651. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIS2446235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a57b6b307dad87b329dec69c33b1bf0cd66aa3fbf46802c22394929e580a004. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIR2446238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2447562c345e5154a3a62f7e0c6d850438f76887cc2be27e083b5cdeae991277. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAIR2446239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6da768f3ee2db03793201762a2fc26c5764e322ca96b097d4fb6805b52f014a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIS2446240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f889927684e5b69806ac05a149c01efe9780acb732e8e56974be5c8d0fc025. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAIR2446247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe615fffd46648de5910b7925a44d453520be9dc7ff62855fd6dfc86fff41c5ed. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAIS2446249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6845dde0ececf2174ded0c9fd653171a7b547639118a3819c6f974dc4e3a577. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIS2446255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2a2c5f093889a96edf469c9ac10d8dc9f8876c905239009c4eed5a3b7462cd. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2595056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1823d6b243174e4d202496cf31468382250444ad1190966c4e4b8330b977cb6. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/TCAJF2595075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5695584cd44746c597b8bbb15129d6bca160cc99fb35215de6cedcfb9e9658. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2595078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577ca1a717f7b6012719d8a82db2c6faa300433069f202a91bc4024daf07b742. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/TCAJF2595084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873061455cc451ed484bef02b8e7f7be3e14646a5b6b56e903c1b0914839876e. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/TCAJF2595085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a36dc5fe735aedd356d7c5012f50c10c89ddfa059cac0046ce2b9efc800ac8. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2595093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8243eda46f73aca76557c22bb14a887b4532a6bbf600d34952b93a30510104. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/TCAJF2595103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b865f6accd85a32705620e8d0a85ee43465188a4ebc63279ec4468b1d4c88bc. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2595105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268375d7a3a030bc575e8af3c580be483ca2f53f7449d554940f5044f7ad9da5. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/TCAJF2595116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d633bdbd56b6ef125cca73d248987ec2ba88ba15efb37424f64c2dd2866ed0. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2595124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32917a40fbeacccf8ed51d4444730c16c902aa61559609d57ba7ace2cb70384. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/TCAJF2595129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf850737af915d68622f3e769f7f15e792a49e9f58ae933a31eedebc55fa9dd21. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/TCAJF2595132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3ed35fa415eb993983b853f81fe1eba3bcd70d644b7fa8baf790a53d9be7bd. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJF2595136.