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 0x7372390c45cb56b1cd5950447bed5d9e1cb7968e4747cf25b2dfbb8c8731866a. 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/d247283a-5273-4e65-a79f-81f42eb0554a.json and https://artists.proofprofile.net/proofs/artist/d247283a-5273-4e65-a79f-81f42eb0554a.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 0x7a493f4e0b06f4796b4718ee20ac4c3661682e7dabd25f4c7db6f9f09a5aa28a. 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/NLH3Q1700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24c7725eb31bb6e778f2fa4751aecda1b63733cc057038528673ce78f10b301. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/NLXS51700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f94c96620e05f4d5a76d964f781865aa6f7a0be0ef807512453d07fbf855402. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:27:35Z), 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/NLXS51700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec040805f25af1d693cb828aab888b68562e8621d5866801be0678accc72bdb2. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:47:08Z), 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/NLXS51800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcd84bf20147b975ed898e1331c8b16d86ca16dd2146dc6cc4e21454d0c8568. 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/NLXS51800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8e6ef6d8bc3f243ba0cd8d8cfd819649d3d0ef8f519e5240c65938b36d8d82. 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/NLH2L1800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e9ab391529d641d158301c1a29f104fb6d3f840b8d1f44f83d87b5b5e74403. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLXS51900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2162283593f5c4f5c7cd3e801b8fe5a81db87bec0281a5ba08e8bc7895506814. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NLH2L1800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf15ba117b78bd0010666569632a888e65d454576efc5c32eec3e4d1b13f2d4. 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/NLXS51900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7526160e3c9b8620201e065d5a4f9890cfd31d08b323a3c157ad5fb3f2de6a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:30:35Z), 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/NLH2L1900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7278133374627095084356c7febd9527a9f867b973c7d4c017aac691b43741c1. 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/NLH2L1900176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f469fd647964b4aba4b25c447a39060dc59d87a25b7474d64355a8b52a7dabd. 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/NLH2L1900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e80e1eecdc4611a46365d34b22b038d480d105c9872aabf585dac2c73ebde8. 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/NLH2L1900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8b02bd7e6f9a843368f6a37c49ef21fed2dd5f05b59de2ce8f784d356c3327. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLH2P2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf611afdfb8e5f3ab4cff7ccef88ce0aff8d2310a3eb0e32bad4964e16785759. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:00:34Z), 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/NLXS52000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0179d62bb88dcbdf2f2336dfd43191044e4bdc0382800890965da8a511c04196. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:37:12Z), 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/NLE802100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da36148b7aaca06af87b43b22950e648b38a87d91425b06b693d5503d2cdc42. 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/BEB682100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1563cc753d250c00ea2e2a5ba648fe99a38408700736adea5a3dda38bb7c14ed. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:17:48Z), 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/NLE802100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c19b5b42040517d5dc27fd6507b393e5a85281518a756a4a7e75cf3b27c6550. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BEB682100346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46fd2d39b1e4c234376fe4827f1aa92932ffaad95d8d727f63a0f6725ecbaa0. 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/NLE802100696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ea2f128676c5efdb98b2f0900cfa8db4790a1ac95d96801b0b3a93917546e9. 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/NLE802300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63787bd1eb43369ad7a51d803bdbb0f1f3dce002de0d3c74fc44dbce0787477e. 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/NLE802300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d633e9a9367acf99edc06b66b9097df3cb2fd5b9fb4d92aa00ce298397c6cf3. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:49:25Z), 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/NLE802300445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a215172d687f14b6f0afa6ae60527094c46377b6344abbdc4f66f9f22f06180. 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/QZES82459385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf8ff0bfb2fd8b8c2289ed0c5c65dc69f5ff13c7b53349f937fb2329cd7b4e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLE802200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e686a3427c76c338edc62bad1277411a8b9d81fba6f960b43a0cccaa10cdde. 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/NLH3Q1700091.