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 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 0xb7a1ddc4f6a69ea09a137a57a8b43ff99fdcb76d4d985802bd5586909a306a25. 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/8c5499a4-7582-426c-8b96-269458893b9d.json and https://artists.proofprofile.net/proofs/artist/8c5499a4-7582-426c-8b96-269458893b9d.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 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 0x10f66ec8d68d507678ebcd789f8192ca07cbc437659a99a9b0775a2d816a0f32. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM82037545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cd790b0fb1993c7589b99905408be5bd109aa22b1fca1db681a2e2fec9c7a1. 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/USHM82037548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b6ef1191d480dcd01ee056fbb167d48354cb2867969bf35b2ccf35dfa0136e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USX9P2032449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8745cebedad53b23eb5bc4bdc8d9e84ce4f76396b6f114cfc99cfdb154ec3e. 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/USX9P2032451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89191b61914e0b19ae510cb83bee1fcf09df92b60334eab894713ae61b27279e. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/USX9P2032456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed20aebaccc13bec8ca3b2fe006f616d3e642df38395b7e5837cb8847c7aa75. 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/USDY42167501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e421ff49cc9beb9489bfa33a83a6c6ab195e68098a9d34404666cf68ceac5a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/USDY42167503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb760152613611a9ede3caafcfd6ac63d5ef080448974099f2ac2c2e394756753. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USL4R2125260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28084ca26376bdd4b600a9bec40fcd53db3f3d3660a6abac40ae82763df6070c. 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/USL4R2125261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2597e6ceb29e845339188ad34ddf835114eca42a3e065d7fd4d6b3b025d9000. 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/USL4R2125262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e16c887b29f7cd8b506305a93bbe45949e925c06f26eddd477e2ad95bc6903. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USL4R2125263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9258204858e1299ba75b2bdfd846621521f9021cf61097570d7b78d92324987. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USL4R2125266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e4b5ffc8f002d4c716a9e741f6c89c17ee08e30aefa727e098ad75cd56545c. 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/USCGH2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dcbd4b215ef2321ff7353fbed649f4dd01d3b343a80c9c2080cb385dfbed1b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CACWV2228835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ca77f33f0fe2fdbc002d7efc792b047eef1c4bf4aa13012e0ad369a87fa37c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CACWV2263778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc965bfe335fd8e7d61591f7eaf77451eadbb728dbd2467b1e58f8aad66de73. 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/CACWV2297389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9fa45a021aebb3f7bd298ffbe92f7d4fe308ec82823db2acb936fde938c7f1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAHQJ2211621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04ebaeca5725bb6f4f53f581f8bd5bd7e7687431c9dadf47bf20df0eddfd043. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/CAHQJ2257464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf35b71100d49eaf57c03717ce53561b2242e13cd7211c0b42107c0fd8329845. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAENV2240688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628770fafc1b926d787493fe0e0cf5c3773087bd3d75d6a2a6bde84536a85955. 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/CAENV2261240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b599d289136535618804577b379d57b556a15b85240039a12c16629d6ad640. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/CAGOO2206825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84ad1a46389abde0a885a40540fd546908cb0205a81b92adc548372bb219799. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CAHQJ2332967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf05a60955989ea1f29f1d0d157504016c6e950c9d745cc75e0fd46670ea8cd. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/CAHQJ2399289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243ac9dbe40544d7e2e685bccfdd8fbd00b8e1bc2c3361337653297c41f50d30. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CACWV2303634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa80556a38337cc3dbf5931e00060c70387eb88872016258d79fd39ce0553d5a. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/CACWV2314109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8fa043ec7e9653d68cf7b7ffb5a48301af403fc867837d17a885e4f0f0cad4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CACWV2326886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccd5ca18b52c9c0cc0670e5b81d7f7b93141695a8483bfd7d971cbe509a7598. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CACWV2337030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53e35ab7b65560c27573a549fec0910e2e58d5075a6e28bf2ed6506f01c6a56. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/CACWV2347904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3097a6fc3e7115d86ac8b6d0516adfeea6050a2d4849e4f7024ef29fc7cc9e55. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/CACWV2358470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6768ef48bffbac4a91ca5ec40f20df304bb44b611a217f68b99de5f53e2e9e0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CAENV2337738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeec4cc3f5d0231361df232d1ecc6c3393ba6696b49e683f0b749eba8d9f2e74. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CAENV2362978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42bdc4ad79a2b55873cf79c330e18369c8cf75a33d96d78577a77011638518b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/CAGOO2328112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536b2f8f0fe7c31ff241f8f97c6be3b705a1576dcd847d1a5be7fa87d803c753. 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/CAHQJ2479561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139bec78800eeb9f608999995e44abd75b388d3d7fa5b5b7aea83a6c4d5ea40a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CACWV2416406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d87a636230eff2183287a3ed515b3b5c9c73480972fdcd7e2e6aec7a48bdfc9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CAENV2461830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db314beb799b49ff279d09142f9b229bec18df11ccf5ca33b0e5140610575a1. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/CAGOO2478443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba3acb930930ea7271d3cb63933bd81b9ea50a6e054ee4e767e26313d562bc2. 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/CALVP2438475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0dbe805b93cd7ee1780b147b5e8cded9927979f0fba5b269286c788fe42b99. 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/CBEYJ2430381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2663ed0ea90d427ce994d0bba9a8ecbac2382ed53ac530417d71712ffe0cd6a5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CBF8B2473975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ebbdb728ae30f9e9a752f47e8bfa04e0e0267654fae8280ba6c816a2308164. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CAENV2547429.