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 0x9419c1a5b3c0228155559fdeaf269f356660751afad239c9219f0e8018f46cd5. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cd5e619-5238-4a6c-a0f8-9925b23eb31d.json and https://artists.proofprofile.net/proofs/artist/4cd5e619-5238-4a6c-a0f8-9925b23eb31d.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 0x06e521397d482e1f0048079510b5f63ac18a538a1ea8e1012a9404f1d373f684. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7X2487610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ec4ff0d57ce051a7fdc99a1e6995bb562fd95069a360b2da7dc50c144093dd. 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/QT3EY2461194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3a3e630fe07b90871e55a83f95c570d52c7ef3e15dadb4a10ce9a887404a0f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT3EY2464525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0aec72b19b7f68b22d5c31f704facc5395f3268093bc1e670f06958743d546. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QT3F22429590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc093e7337211eb5f3673f6afb695debafea6d5aa2cbd8b5535a5db72a5b4e78b. 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/QZFZ22500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621d0980eeed9d3f69a86fc322bfb33d51dd4c76d5d00e82602874399313de31. 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/QZFYZ2553217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd928ae3c605fcf1d9d034314e95ab8e78b8a06623864c1d68d9cb90acf86b2f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ32553351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b605f06c49fa7df0ca320819860fecda5c1efab3ef7dce558cd1befde02ab3. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZFZ62548843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6c2b8ddd6b02898ad43276ee3a5368802c777dda1e62dd4e7209c1bfaf314d. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZDA62580593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaf66323f404742d385c8bb74b4d5160009acb9eaed2a65ed3532fdfda741e0. 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/QZDA72512456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cac3b25dcde934437089f034b576de531945b698c3a3426d4650050b2c9d60a. 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/QZES62569908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd008d9ad1598b50b07999e82bd4025d85c4b6dae29bd60b686fa5b0ac45039. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHN72565924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e7f7804c3eaf10461f67c9fadf401cf97128b2dbbd6648205efa862014b20f. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZHNC2560349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c05f6ae5aad08b1ab215198ec36c6c5617bdf8e0b61571f410b3eb71b637b4. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZK6N2548597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedbf25b4934ca1a573ca8ba8ce14c2c455a9774a1d91f57efedbc73f220a4a1. 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/QZTB62593068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b917addadd36f1dc1c78a078f62a09f3f1e245d1b7d9f8012ee1891e6bb7ed. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZWFT2593431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde359ad6c0d07a12a8f6d4331f776f58a2902545c0927a271a61a67426d91b38. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:28:55Z), 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/QZWFT2522018.