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 0x1feebca2593a7bdaac7235b88833981feb2c35fcea8825b621860900afdb251f. 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/35d3963f-efe4-40f5-840c-d945972888d9.json and https://artists.proofprofile.net/proofs/artist/35d3963f-efe4-40f5-840c-d945972888d9.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 0xb6e72fda719cd208a8fd7be18fb5d907d12f3b74da3f929fb84928e3bde0a219. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:55Z), 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/ES8241762206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf451659fd78b7e6deee03ea8a6fb801d55a723e350a5a4918b9aba41be18a5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES8241762303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecc619bdc3ca8ca50a0a1c40ccd5189045a51ccdca4070c1a5ed4169c95fa57. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ES8241762309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88461f3b1a0a9e947b8bdb584f447ed4274612b66ee5065af62e93e6ac5d977a. 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/ES8241762310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3beb5c5a7d71bef4db71f468da04219a010fb13eb7cb17e5429673a8aa110d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES6101087401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b36d6f1be4b882599572c27251bbf2818bb29874af6f7002c891a27b5c8678. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:59Z), 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/ES6101087409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11a69ef44b0a6beb0a1300bde614937dbb2f4ffaab7bd559b6c0b53a9b248a3. 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/ES6101087413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0278bb8b3201163c58317517864f1df20881da450504859e4c9cbe92fd0e228b. 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/QMBZ91393554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fe3a5e1c62d5eb4ecc417776d5cdbb946179cbc073ceb456d01ac0b49afc60. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QMBZ91393557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bfa7ea620e1e7a4ca8c4c429426bd1ff7bec0c84d98a99098587a47f5b7d06. 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/QMBZ91393558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f9ffad8acb4c86e1963918c9602a1faa8e388a659128fb6224f77813687fa7. 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/ES8241825104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f8f7ec8dc4f6f3bf4b95287b14bc5fbde20b7c3333d05f9a579a79b3886b61. 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/ES8242341101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90e432f785e2478d38235d6f75459ee0567dcac52546e0dbc158b2c1c081158. 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/ES8242341103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1635a42eff687a5b40751bf7d1c51431c90a16807937399fdde7e94fb123083. 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/ES8242341105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b767f4e15ef6f5b0a882e286b53402e6bc318636f60c1e2e18b972552fa0718. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES8242341106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f8f7ec8dc4f6f3bf4b95287b14bc5fbde20b7c3333d05f9a579a79b3886b61. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES8242341101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a64100bb36bf1bffff1be5b3e93f67465885d495cf23f1137968dca35a1ed. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES8242245901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaba261d515d8926382a98fbfcf6ffafe8fcc4c8ca5d551cdecbd05af572646. 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/ES8242341107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b767f4e15ef6f5b0a882e286b53402e6bc318636f60c1e2e18b972552fa0718. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES8242341106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e79d203332a84f69322097d0892409124038bc75bade25f5ff719665566516. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES8242349101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa73a975fb767760e2b628a0d74ea46b40f99c1ef6a2693ae0fc8c4c2dede73. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES8242341102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9036e578dbcb4344d990cfce7896b183fb596e945d0eb5fa47e9ab968e4271ea. 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/ES8242341108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90e432f785e2478d38235d6f75459ee0567dcac52546e0dbc158b2c1c081158. 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/ES8242341103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e4758de4ba08df5cdb47956e8c315cedff4231490540eca0843b7d0276e04b. 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/ES8242341109.