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 0x34249e9b6b1ff629aa546c00df091033a42f5c5bf346f1d6ee00ca59e0e4534a. 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/ed363f58-977e-4157-b973-ae2f04199a82.json and https://artists.proofprofile.net/proofs/artist/ed363f58-977e-4157-b973-ae2f04199a82.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 0xa1131d1aa198677ea8d7ddc4d618d475e87cbdf3159936e8b83497f2ef705636. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/UKXN22423634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a33949c4f7de4116cb4cd1538d61a54b08b2c014c7ede195be881a469684163. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GBMA22401904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115d435dfddd41b4d0702f07ec6a226da620f9098a2abd295f9933bf732ea2bc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBMA22401906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a5d5c176d3226d06aa89ffa2a8aefe3fea6ca467d5b9cdf7520f1c56bc6df8. 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/GBMA22401907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682bc220c65f2fb99fbbbe4646f48b1f27e429bf66337193b0ba14229681b255. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:51Z), 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/GBMA22401908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbce55f813b77a7a8063e1003032bd4ca134268d6c911d96330ad4c746eafb4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:55Z), 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/GBMA22401909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84db8b5b08b9255b2d224e19ebf1e2a26c972c60a81d4668c9da83ac51a1b2ee. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:29Z), 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/GBMA22401910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95162d9e9d0494bab065a4d14216adc3ba17b7cbaad5fd45a70730a18df2ef21. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBMA22401912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b168d76f775b09103aabd65b95b57ef4cb87c577fabaf1ee117bf613a60551. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:09:49Z), 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/GX53U2381314.