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 0x5fa8a2a8bd307ef22195dbbece6f983019824cdb963b0e42168a4478ad3bedf5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a879d54-b5a2-4e8c-a16f-ea149777f56f.json and https://artists.proofprofile.net/proofs/artist/5a879d54-b5a2-4e8c-a16f-ea149777f56f.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 0xd45ef883080141d32a78c9053f0753ed3360a9c282a72e3f2f923f0a09f30b70. 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/DELJ82046372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13eae626b671e422fdeaeba95d1c202be945ae90d57f7decbaa202026a75f87. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZK6H2158313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02cef2103d9446f276e66a30fc0cf4610269f1dcb2abd559c08f64ed78f5549. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DEZC62129366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366401773c64719708758f931c67bd4117259ca69918cefe0e6c019ca9f95db8. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNWY2105151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0416e620158bb7cb0fd8c202ee51577844391e84a24e117e9014719959b530c. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZDA62219247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c18d7173f9ddbd3c356c82479e3291015c836bcb5aeaeac11e11a2c8ed2ece. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZK6M2286183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12383ddafbf2437dcbb531ff3ef146e116b736468949f8001394ea956baddd39. 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/QZTB32252505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96df39c1bea19dd2fe873b85faba65e9356ddca9984b041f8c2123f649429341. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:32Z), 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/DEZC62336552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa865a76ba202a3dc40e76d0c237bad1bfa2f29581ba323e459e249b6188e9c2d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTB32376791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2498608981edca35df2888cd610caac0461479a78ddd4bc0a50ddc3db4caa4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFN2358018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0841562f9b7e9a468ca79992111114d6050e3ddadea95556bac5226e7d473cc1. 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/QZFZ62410712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846d4d5c237659d9902a9ecc12d768cbe84ee053f23d0ccdb6289f5803562af2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZES82407934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c54a12508df153146b4edbe6881b0ba3a21ba7fea23802635d4d23ad7190fd. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNA2475666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8061ff35942f6479051a77e8da37b44bc183ede6cf8efe0bc00c1e1a072b3d7. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZK6H2404969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e3433577f0dd89e3b97062d56cc8576656911a1160711bb05daf8e92a5850c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:25:16Z), 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/QZRP42458690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8916571e5c79ee4a803090ca67dfeb2394615531a3f2bdb9b3270f651f82270. 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/QZTB22454633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0077d26fa5f29f1fe892a2c888cdd48114c48d0e6dd55925d526bf920408fbc. 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/QZWFM2432405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1338fb68cb02b05d8a1782450dded344e17ce590ec786a9794b5ae56d328f151. 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/QZWFX2430444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a130fc203ea35a429143d82eed5f8d23aaa588261c7e9cb535c741688ae84e7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZZ7S2465267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f4fe45a977f51064c695dafa3e55ab54e5c8445e7f61b080660a80516b9fec. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QT3EZ2442615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aad946c3ea857fdee29d7912e0a56e7f7bbb8a68b446cc244c6a80f89ab094. 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/QZNWV2588606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aad946c3ea857fdee29d7912e0a56e7f7bbb8a68b446cc244c6a80f89ab094. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:29Z), 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/QZNWV2588606.