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 0x5241d1bcb7cf37a739da68f53f502c005173104658040c3f86c1c5ec5f778136. 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/2216804f-395e-4c8c-b383-d118e386d9a1.json and https://artists.proofprofile.net/proofs/artist/2216804f-395e-4c8c-b383-d118e386d9a1.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 0x6e0c36915d7c38707df108ee16911cf09232ec879eaaa4d1632264ecb652b1cf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN52492391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a84e932947e7bec1ad3f9a6cc841a90c7119c17b3675279c58276a4a0375e27. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:40:31Z), 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/QZNWQ2480874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aefd295fa8ac46fc2ecc22781c9081c21675a06bdb2be857a3c14bd9bc58a7. 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/QZTBA2433012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb414377eb5c9f79ee02c1291fe19e656d371fe0fcbf0b9be64692b21863643a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZWFK2476874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb727547abf7fd99f3d66d1c0f2fc79029c63beddb86587b608c31c115c3c432a. 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/QZZ7T2426413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef16cd29c14e8ddff5ed62b2e5ba294c1b6a11131fc7cf6aae78cc87609569. 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/QT3EX2439579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53770cf04d5d60f307f04bee04300c5de36e86f1e841b936a5c014ad3f8d6bd8. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZDA72506033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1757bbd3b4841de8d45920b22595c2447ae04609386ccb29e11638283a8d88ee. 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/QZES52560403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60807b563f4ca38728b264a377426577926fdc7c63d3a01f0194958b1f3e795b. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:27:49Z), 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/QZES52560404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e369c154f4fa7e6ca66c8c502c353239010fc2bb87cee6d92a731f77c259870. 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/QZES52560405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edcdc402e278691c2743505f56da96dd19b716c758cd0f08f0f029394fd7419. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA82585274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d91a754969a4afd3f8786120759e1fcd69c7a6ef3a045df7288703dd672343c. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:10:51Z), 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/QZDA82584142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7e079fc229ee85b34c8fcc60274aedfa377d0d4141b9dfb4c51e53ec697a78. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES62525481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba392dcd78710adf8bdd12f5da0916aa16cf98d7f9ab46b52d9e03cc44c74905. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN72504989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57b5ba09ccddb5214e48845c15309adaeee2c3c94a93c63abce8876fbbd5dfe. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6N2504487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa170bff072a2fe12af0659a5f8723408598d2404f5bc474a68a320276645e6c8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:03Z), 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/QZHN32420556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cddfc39ca718389c7516cc45477b5b550b7128413df6318d74dab905ba230bb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6J2526301.