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 0x85f24dddaf6214e5a167d9a38d22c871aa1cfb72aaf27af00267f09e310b32f9. 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/50ab4176-69c4-454f-b077-7b79befb964a.json and https://artists.proofprofile.net/proofs/artist/50ab4176-69c4-454f-b077-7b79befb964a.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 0xc48671f8316a25ee63023bf526cbaceec499d790ad7e07a4d2b248338c154469. 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/CH7819500606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37132959fd547e0904bc5d5e947e3a5f740a5282ab566032cc08cfdcdd3de25. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6J2430290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61dbbadb7f63b9b94eec10270951cea1b51c94554a6f73e8843dce84b643413. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6J2430289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6bae1b1bd4f69a5fa99a82610a29f0aad1f776e6c43064edc7e089f0e15298. 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/QZDA62465112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab674d42fabf0770df7814bcc41ea9a8fc16a6cfb825a6d322feac010438168. 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/QZDA82400955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48dffbc6e2050baa4492f7c3fcd7a3badaf00f11c4c6bf3abb9167110e91abc. 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/QZWFQ2344595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9466120382754ca8cdfa29952274286a5af09cbe362da9dbf11ee6606e6d8d3. 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/QZWFK2320152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991472d3ffd60d45100aea2c2d681db0085184850221542d71153df7defab2bc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFF2354192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8350da1071f3227915eeed40fcf69eacaf6487565a961aecea0bd7821d3936a5. 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/QZTBE2341278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9e27a8df9d3db3915f1575efecee9c9d4d5d3fea6673cf5c39b90b45582c93. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBE2344557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d75a224d8201576ce6f52583568d750aa951ec73800ad64acb7c2aa7ac9672. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBD2391159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba2372eaf648f8b42cdfefccae0e91c7a03131e7104c9b3965cbf5176d87f42. 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/AUGBT2329777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c93957b254b18687f5fb2e873c0e1a21106533e9096f2bfee72e53ef95ccff2. 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/QZRP52373658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b8cd40887ef527bdbed40655b8f453882e084c221a421b056619651a1e792b. 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/QZRP52372564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457001035504c245cfa37ed6b80cbe5ea352886550ad4c818eebe02afac994fc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6F2342458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f2b7042887a84bc2617623e9bfedc53bbbd862fde51ca6483edbbb4a4a1cbf. 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/QZFZ72377868.