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 0x526ba00d07b705ae019b138b55feaa93853f6c478568e54e847f6899c0d3a893. 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/408018ad-2075-41e0-8838-261e8d6aece8.json and https://artists.proofprofile.net/proofs/artist/408018ad-2075-41e0-8838-261e8d6aece8.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 0xc38ae9a398203893543c4870eb19eeeb1f60ecfaca1dab45bf9b5a9953b9eb9d. 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/DEGA22303814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a07b6830d23f31db451eaa11a686487aec30e2a6ada780cb8ebaf10dd6b325. 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/DEGA22103399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96d973b9910322cf9e7cacf6817fd5921669445d968bb33c98fa39d7502080f. 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/DEGA22404170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82401f541362e335bd6ccfc68d4d59254d2a59065b32ce81347b8d871e8cecf. 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/DEGA22303977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da77a64762b2e64d314e146632b5c7107e1393f6b75efb4689e348413345962. 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/NLRD52080736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b46a03af65e44565a98201cea01558bded2f591201ef8c5e7c1bd73cdd8bcb. 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/DEKC42300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de94786a709811798e94ce8798c607da1926a8ef11da305dd31040d95a9df7d. 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/DEGA22303908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2802d14225ab9fe6c2741279bfea008ced7e9a4b77bff3642561de5536e3c855. 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/DEGA22303849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead7e3aec49d9e8d05abdcfcb4dea96718c87b7ec54b3bb5e69a0b9fc50b26e5. 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/DEGA22203749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd727854bbd3e2e769ec7a103d676e0d3c1bbd9dcd77dd2710f130767211b566e. 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/DEGA22203723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c78f62d429787e135fc6d4115b75836e43c0ff4f93413fbad9d2bfa36fb412. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEGA22203659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3655c0317a8539d86d88b1e4535744921f2985de6088125f56bb718b13e14d8b. 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/CACWV2271284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1475cde61212057b6549a7fa0bc7809e79a0d866cf0219bf092a31bbe444b915. 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/DEGA22103566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5289222f3daadfa9c5ead492b03fa014205ab57c31401b95a4baee37f14928b1. 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/CA5KR2116993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cea2d03f8052307edbdbbf3560f10ccd2c019efddf18a2e4f2ed5f9c8f782f. 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/DEKC42000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c55a216b551d6b99e8a01609367cee2a72ac86168f211b858842d2aa87b0173. 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/DEGA22003265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56970f064b0f6ac05ce1770e264c1cef1b43781269f006907e379a6dde558387. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEKC41900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e467f0de50a5d86c429adb895840e5c610119e1e1ec4d8da50d46fed64bbfff. 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/DEGA21902893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd4d65c0d9c233cb90d73ee979a62cd9bb7df3bab4e58ae88340ea1e644e1b9. 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/DEGA21902894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7e78389e64119ece93b590d5a9b85abd57a9e8736ee7029a48510366086da5. 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/USA2P1535200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f09e2e0cc880178c4ea4f3edac35a7a73550453b1d0322f7d1d334f9cdf779. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAA012300244.