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 0x27b6b3529d8f846167debe6cb9d7c5db6124817cd7dfc6f5f78352db5cf34d69. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50f3459e-2b84-4b6e-8be0-e579f55c762b.json and https://artists.proofprofile.net/proofs/artist/50f3459e-2b84-4b6e-8be0-e579f55c762b.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 0x12562f14ae89fafbb162680d99d8179e43c108d87453f310a7c36ba883b80935. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM21917586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae43f5dfa192e76a184a133a2771a97f753f865c06cab493f9299ed57592ae9e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH2063952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17b4c038d6f2a16a280639c418a9763cee4349e2ea3231bdb7d455e831f8fa5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLRD52216839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6396d6883221e3398fb0797193aee9caa01b6ac13849bec4ffba423996b1e009. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLRD52216841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0da1301337d6ae20887cf4c9fabe43bbcde8c11cc5aacc35a96b0bf3ac848af. 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/USCGJ2450445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1d8911c4d9cb6f3cf553e2a4105984d15211f882760afe72f88015b6a50a2f. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/UKG3X2200352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed65e70434e3290f47ef729d07c313494e33a5fc2da3e1c530f6554eed2dc03. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKG3X2200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7ca9f34eb751296c709d404f022ecf37ec6b698b65a71271c64415ffd2ce69. 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/UKG3X2200353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1d8911c4d9cb6f3cf553e2a4105984d15211f882760afe72f88015b6a50a2f. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/UKG3X2200352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53107df4711d96151e94648a221301769336a2305dd8a44af4f3625a76ae12cb. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:46:41Z), 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/UKG3X2200354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689b34463713993c9ba6fa66e80e7ff7d71cdf3c9e8fa4ad8a85dd20e7caaabe. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:51:43Z), 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/UKG3X2200343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7ca9f34eb751296c709d404f022ecf37ec6b698b65a71271c64415ffd2ce69. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKG3X2200353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53107df4711d96151e94648a221301769336a2305dd8a44af4f3625a76ae12cb. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/UKG3X2200354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38193d02d587439ab0c549079e573a93fc4ef0aca6870708ade7bfbf0bc289ed. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/UKG3X2200355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689b34463713993c9ba6fa66e80e7ff7d71cdf3c9e8fa4ad8a85dd20e7caaabe. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/UKG3X2200343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf419f22315ca52a40c8abb44a4cf937de6d2d5b343e37f5c8fe5bb140e792ddf. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/UKG3X2200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed65e70434e3290f47ef729d07c313494e33a5fc2da3e1c530f6554eed2dc03. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/UKG3X2200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196c4656f625496a06ff49c9436fc05e2dce48d45457ff1d4ee3dd512a58d0e0. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/UKG3X2200360.