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 0xa792efc540cfe34515d48b0f061ddd8654a52acbe0276c93cc4020a54ea5ef49. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8272cbd1-04dc-4598-b41f-ed553527a2fc.json and https://artists.proofprofile.net/proofs/artist/8272cbd1-04dc-4598-b41f-ed553527a2fc.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 0x05be8d378331329fc469fc95f7eb397acb7972d68c6f3b90b88f4e75d07695be. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:35Z), 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/QZDQH2511444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ba98508b515c8803b3bd918edb92f6022a2e0165c7d5b706b9cccd65940945. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZDQH2512861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9a58e72f6139fbff493a97277cb8cbbb398691eeb34a5de05ac0680ccd4d4d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDQH2512860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2041858c8d606e1fb030dd45f18eb8458cbd989d3345e884fd5986e0e9e630. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDQH2513407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08063c292becca3ecda91f7b162b91d07886344bf9525e9870a6c15d9393d62a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZDQH2513408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e724e633ce7302fee27b57535c1f049ec17c3c6eac48233701d908b85fa790. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDQH2520051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727c5e4363eaad8dda77f65b4c6498ecea3fd1922138e29078a4fa1f6bad558f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:09:52Z), 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/QZDQH2520048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e4559da1f9191646cd0d8032679b2c705a4bcfa6e751be2d6714ba074f0360. 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/QZDQH2520063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde1bb690b93ddddf43bdee748dc306eeead06cdc01580a624150c4093b7a20c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:27:10Z), 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/QZDQH2520049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46693ba6662aa011e29f0251809f4bd58c4d5bc3135f100dc8e8cd261c872ef. 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/QZDQH2520050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad10b4b3923544b5d130ed7eeb6bf1ffcd2c48e306038327bfb324c31fbc5b9. 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/QZDQH2531371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bb5470f7d2c99a2d9a3f98104427bdc507164353bd2d60000d28800d5eb31e. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZDQH2531373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb9d443f1925d8748441f79c1e465afa29309b7e3f601aabb5d6845f97eb97b. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:27Z), 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/QZDQH2531375.