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 0x4e46d2555a73fa77882cfa3f6aed87d533ba89360ee870b79f0cfd24d8333928. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/529f05d8-7a55-4fa7-acfb-61ad56591aa1.json and https://artists.proofprofile.net/proofs/artist/529f05d8-7a55-4fa7-acfb-61ad56591aa1.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 0xda849c0a0e8983cdf967d6a77da7c6c4151a0b7e4e8f68826751d44c1971da7f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USX9P2049616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc384f9a329653dd93f0ad4d4d32d752b48a88f36f23d31a05cf19f3e9ca0922b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM92094955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fbc44ee4b1973e790dac1f131bcc43ec9c6130fb212739ec46e619a0c57282. 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/USHM92146033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949fa2ca6ecb6ca31f9a927207062c7c28ea89d8f43b587785c6813fe9c7927a. 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/ES71G2204516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6339db819c3ba3307fece5dd6b493c088208c90239f71c89f250cdab0a331c1a. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/USDY42152320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa25c0f426f9aa7ae901d77bee4ba2da3cfdd7f36f83292a12d0f093e5514593. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ES71G2203622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0df284da78652534cf0966a9606d51d9574462068af9067b858ca1258ff538. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2211208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ed5c8972280b299fb444d58114d3839e3bce1bdd7f366af3df0b9a1b4a1d87. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/ES71G2317715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c64849a6536a3e07edfe267aab473f590a63ea50be286e16ae9dc3cb57584dc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES71G2329606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94188421912fcfef84d35a3cd6b5abeb25fd50341870b694872cf678c11cb894. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9L2353394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1464cdb75c17521f3c7403ad8320f648a86886e7389de50878977683e754f99e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMZ92407535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6431c3ac1bc2d20d991cb1bb1c65ff6607101551d9f6a7734a1f350b7e7aec6b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92407537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6367e17d6042ddd8f31c8c34f55c7516f89120ae9acd23442b8c34f3df8b0a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMZ92407539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954b54cf382317a0e38254c5a983f41c20037cdbcf7bc9c0d5202230dea63a8f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZMZ92407531.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56007bb78d4280ae53cd7612dacc4083ede8ef339b346e963769081b7fa991ff. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QZMZ92407532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfc494ea3fd79c223ae3af0847c2076361c4ac04c80fa1c6d35d4a8c5bf14bc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMZ92407533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2da44754286022cb7f3454b0d8aeb20a15d3d9a35efabde70af4c4e68f67039. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZMZ92407534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a38a388528ca41447a6a0a2a8a98303f81231dcd24eeb30e271836c8ef23d07. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZMZ92407538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107f9620878be141df09552521c4984bb408374625aac28ffd8215a4bd700e81. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHZ42149751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb720a4bbfef7921724bf8cf1bb591e0b34edd9feb7610ad0b9ca59656d4a3d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES71G2034923.
Strike vs. Blaximental - Cuartos de Final - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321da6591785b4c910d1d895db1937b83704d5636075a78b1e83b3bb25ca39fd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ATRG71880004.