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 0xfa5f77f73509f2482d541918e78e7657672bbf9d4d673fa836e714a1d8789ecb. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e03ca52d-b206-4bcf-8385-9b4eec691c85.json and https://artists.proofprofile.net/proofs/artist/e03ca52d-b206-4bcf-8385-9b4eec691c85.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 0x513f57ca1e2a7470bf977c9e2b66be632da1296cb5521cc2dfb528541ccbf198. 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/GBKQU1883977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb02a1403059796e2842425dadfff24f13b2719496d92a53d1b06c9cfe4949b2. 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/GBKQU2480256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7919774fe262b7adfbf55e40d505ae08b462f602a27fdb6dd42e076745b02ad3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU2519061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14463d6b13f6e4b3da653bf4565d8b8c203e7d1cf12dca4bf9f99696eea8b469. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBKQU2529687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c49f188f31e22e3144ffb37d9eb619f99f59d5d728ccd7ee7b47dd538ab6e35. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:03:11Z), 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/GBKQU2534717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfc9f93ad33f3638e516bce11a082588f90c3bab8c696090c99a4e4e4bb16a6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:47:08Z), 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/GBKQU2534718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87648814261c2e0dc9cbc0c4f926c89568e58b97bec3979daa1c732cdaf03c1b. 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/GBKQU2534722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde16addab691fc70bc7020cea0d7afeba1fb0afce3579864f18a42d39d4a124f. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:39Z), 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/GBKQU2589182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a55610ec6bf7aaa1a6c3b5887bc7f334eb5e59921665c581a4123cd76b9ea6. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GBKQU2592734.