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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f35b27505d74db500acd81a5c362f9fec9f491e9804f39e205c958fcc62d91. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85b444be-30c0-4443-b9c9-b25d0a87de9c.json and https://artists.proofprofile.net/proofs/artist/85b444be-30c0-4443-b9c9-b25d0a87de9c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5d25ef8f2a745e3f96707e3722bfe3da378ef75e26cb8f16d7ec02ea926718. 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/PLUM71801205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cf11a7f412f9c82790f59aae9d37f99404e7f09f207bba4fa71d625520e221. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/PLUM71900626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f302d3fe121d1fc45bd68ccdb1fd6ffd7216f5f1fb7dca6c75f3a9ea995c71e. 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/PLUM72000734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bf4509d167ac80f4f8bc34904aac5fc4b571ba6833823960836bda535e3f29. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/PLUM72100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cf11a7f412f9c82790f59aae9d37f99404e7f09f207bba4fa71d625520e221. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLUM71900626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe026c3db653ca8af721110b3a9de71f3bbf67e633b63cf4433eef720210b1b4f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/PLUM72000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc048ba4f7ffd81a624fe09503a455523a090d3930433e14fe70c4f601020747. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/PLUM72300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45f14de4daf72902e4ab507849f35e9f10f77595efd93292b40c2310bc17b7e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:33Z), 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/PLUM72300548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8e8506cfede4a13d22b02b6b12e09b8e63d14f8bc69951f52aa6eef879c3ec. 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/PLUM72300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd8867872a41f9a66cde54a9d07aff71a01f454c559c6fc0aa7e566cc3efd09. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/PLUM72400322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc048ba4f7ffd81a624fe09503a455523a090d3930433e14fe70c4f601020747. 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/PLUM72300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0047706adde24c51c6f6471203a02cf973435642dc5387db6a37bb6873e78fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLUM72100809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90809687bcb7c085bad1bbd1825255be1fc382adb8afeb189a61fa12d9a72a86. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLUM71900266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567ce6d672ba5b4690b5390e7614136d1ea8e23b08de960c2b0592fc8d7bd030. 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/PLUM72100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e6e6cd72d7971cc482724e6ad89807deb1909ce69443c6499633142439dda1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLUM72000304.