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 0x82bc8ca0afb264e2037b02ae0055c6c7a8c318bc24fbac6b0f0b7f2f161c1c63. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83948d82-5f4d-40d3-9fe1-983516a49d79.json and https://artists.proofprofile.net/proofs/artist/83948d82-5f4d-40d3-9fe1-983516a49d79.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 0x9a6f7de85c39e339cd5cb1019ae461c673c14ce04a1756a1d276511c67c048aa. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/AEA2Z2566962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56beaea8742b68b436e4db0a7beac5d033fc67d3d7f8b11865700690207baee1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AEA2Z2566963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee46d772757be13fe71afb8e47e10fc46c38d8a309b77c5b88afa0922dafc9d. 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/AEA2Z2566964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb304348153752d7e065b091bcf5342fd8ae6b793e66f1c4a20739443c88c8118. 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/AEA2Z2566965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ef52c7f5c174c1ebce60dd3cb2e9ea04e6bb2bd2855a58de7772576094f711. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/AEA2Z2566966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7162ef64dbaf87aee3eb1772c95619f17102ae25b76d8080d564a9d42fd5fda9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA2Z2566967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2df73e06a26d4f1e768912d0eeda1ea222f7641b06b7b5908f5416e70bd2b3e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AEA2Z2566968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68974ad7ec65d4a447359df106e4e912a5c17ba12669978b1d9678e5d2b4b19. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:50:55Z), 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/AEA2Z2566969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c5f033e62d8c7b6f50af4923bbacfde6dd09b8af039d7b3f0cb171d3a2f51c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:02:10Z), 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/AEA2Z2566970.