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 0x9aaaf222389208fcddb7ef96a11d7ecdc51a4a162b8ed66ccb7469de0b783b0b. 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/05c29952-a282-489f-9261-a8ccacc44e7f.json and https://artists.proofprofile.net/proofs/artist/05c29952-a282-489f-9261-a8ccacc44e7f.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 0x8e09bbc23f50c766e77ab7febcd6383e4e7fab82a28f272b98c834152dc615d9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAFT2184872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51046b9af22d9c5a59dfe05a7d3250f0cd2c9397e9539d46cdefd991767787f3. 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/QZK3Q2300177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4042e5f15012727e427d9283d4b68cec90fd3346cd253a04379aea3acdb333. 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/TCAHW2487381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc105799f8d3034e0c63bd0a783e47f5a31460c39f4ae2e76d06dbcd1cde4eb16. 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/TCAJB2476521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46d60b49ac8ca067f8fb601ae51d160bba2ad8d318a85f80486845f52118ed2. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:39:38Z), 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/TCAJG2576357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68f1cff2ac3e53539a36dc904ae32e00f19c5f1af0f7fb8cce66ba6ffad3351. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:07Z), 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/TCAJK2567020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54d1a52dda18541807c6f9c9968931f24d3f29600240fc6259b660b169a437b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAJK2567046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96c3ec27297be13624d1b56a3b383aee31c99ea71b43445a45924184c2c4d5a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJL2567063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf122a3c994d416bd3f84f9b5c11c997a5ba3909c68252f9bb2886bcefb394fe. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QT65W2526640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16abe2c0ac84e22f070a5f12d8a13f5624b57be26ed35dc70471458b44bebda5. 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/QT65Y2582362.