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 0x9cb9b253be1b92dab414259024feb76950e52d1a86025f85ea23370ecad5b454. 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/011b25c2-ce7a-4c59-a6d3-ec2efc7a1948.json and https://artists.proofprofile.net/proofs/artist/011b25c2-ce7a-4c59-a6d3-ec2efc7a1948.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 0xa1bd2a1cf15f00f8ed97228394d875aa13b623d78da99c00809a3e1fc8084972. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USE830943398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46802494c5a3b7ca65fd59d397814481d80184231727e5957b9c505bf70da36. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USE830943404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07d56ab49f84a7273a428e727aaf023acf7a6185d4d1aba4f80a76755c62498. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ROAAR1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f4ebcaf29d0fd4d9e99ba7d26adc4abd222e00a03840f723d0613ec7f1d5b1. 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/ROAAR1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac79a2d4c4672d27e441231638ebeb601534a45f15cf390a8d03e67daacfc89a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ROAAR1700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8205feab2222a04b6d030c0c3072826598d3bc7f4675ac4f93a6aa2f74ad7628. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ROAAR1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbb6d1a65c8bf038652071257feec13eb157a29c59d4b418f7c9ff63c0534e4. 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/ROAAR2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b422e0b4208cda45c4f8321a948a1d001d31748ecc0cac0d329e7ea2f368df. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ROAAR2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c659dff1f1cc03b958de14f06fbc7c8d73e6c43bb92a9cd4451728f8dbae33c. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/ROAAR2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eed490252e20bc469dc432189eb6a52e6adea6c2fe91bd04474f78275abef5c. 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/ROAAR2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d7816dda985852b3e53fb5ca735f1c4e634df567ff39eb60c78c15fa68e889. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:52:42Z), 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/FR96X2310680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f75da94040c647cbf82f5b4cb9eef85a0179becbb034c48193888cd9b395f31. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA082290862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf943e3b32b3a42d06f4835a7f77bb69d4cbda008391340d7cd20803658ddd211. 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/FRX202230572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e683fb88ad63932002c8557c4eb95649b2c8a4f7643d118d4e6bad33e66c7fe. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/ROA012300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481fe7683db7bb5ee533dd17b3d72d4bc3de0537cfb5d6870d1fb9fba22cd4a6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ROA012300010.