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 0x065e94a4fa0c33c0e5b581baf3579a3980b12e1c4c1e044ad853d4661d343c33. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2d89682-91c7-491e-ba64-45d527090b7b.json and https://artists.proofprofile.net/proofs/artist/b2d89682-91c7-491e-ba64-45d527090b7b.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 0x1c47f9d229a48485ed90566863d152a219650240026faaf716dcad4a7e653a9b. 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/QZK6G2557589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfe8f2f4425744c006706eb4ea7d2745e427c6ca630dd8489c9a902eae6dc6c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6G2551501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51278d8d87fee3f93162bc4713df8c8d2d24d933d944863b64d430ead6a9fa07. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZK6G2555971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c891bfd2fb6eae4ba986675c47546d8a6cf34229f99d9b48d2ed17ed27c01b7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6G2551540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa261e2241d70b5d3b3f28af8afd3b18959104527af98c169b1b1dfc4041356db. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6G2589924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4ab57560a2c21b7d9a91829c5c17199698bd8e01019891d0d2f9ce05e8d6d0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6G2589919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1fa2558be31910bcfcaf504fdfbf9cd7758d77fd2b377d9f7872812ca7225e. 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/QZK6G2589925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508f4e7ca475f622ce22f338482bdc9ca52466ed6413c3e9403226097b08b3c4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6G2589922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce78b7b480ed78d242c7e57bc4cee3a581088756f8ee1905136d673ec20f7bb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6G2589923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf774ddc6a2f3a7656b9e2b58e76ae1e5c01bb1b71acd8f76d6ad09f4f78b3fc0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:01Z), 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/QZK6G2588029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b64b24ccb2bced2b05487e60c298c186d8be7317d19e4afb369a2aaadb53d1f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:02Z), 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/QZK6G2589921.