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 0xe1479395bdcb39e363ed12d2b347f02812bcfc6b747ae71479178175431f1682. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e6ed474-de0c-4a56-8588-1b8f8793a4a1.json and https://artists.proofprofile.net/proofs/artist/5e6ed474-de0c-4a56-8588-1b8f8793a4a1.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 0x86f70f93a4f29016125819d7fd2faf62e92a6dd5c0ceb5de1e2ecb39d27b0360. 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/HUAC60502455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec86539b5395293e5231e484f77a385a198b89770ca5f48cbf5c1985e9228d7. 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/HUAC60502456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276ad3973d7dcfce7c70e4f2552010c1a7eecd85b90442bed8b5ba9db88beff8. 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/HUAC60502457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7991d0c77072f60eec20418325b489e3c67127f7a7109a4eca1d7bacbe2726d6. 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/HUAC60502458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769ec8f9184ee394b081fda9fc6970365511a18b9920643a3a237a478a48cf55. 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/HUAC60502459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf20a23437b66c1f5f9ef56b88df7c173716c915bbad8d53dcaecb4a951042b8. 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/HUAC60502460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078ce265237caa8a3c12e222f0be2082a2823a0ae92fc7505eb8d2e9accee70f. 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/HUAC60502461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0075f86ae4db5ef9c8cbb6f89d4245cb36ebeb3ec682436ef7f72bb5ec4358. 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/HUAC60502462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9005451f4f11f7122425f646e758a75378692e93580b80f711497e7f4d9570. 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/HUAC60502463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250145453684d57c77a8a4b7b844868e3c0699c1fc4c3ae1b9eb11af3a5a293b. 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/HUAC60502464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14748ade86b0221d1d88218e73065e5be1b7d1ec3a7a6d96001d017c4e0529c. 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/HUAC60502465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b53dce64885e19ea583c25a2647d022d167663db673cb1d38a25f75928d6ef. 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/HUAC60502466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd641718a9e0d521c8347ab5a68e1ee110d49034d6691b311f0d2e581a2d462. 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/HUAC60502467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bf2793adb6ff62fd18df1337ed340150f1fa3885fca1eb77963592e67d10f7. 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/HUAC60502468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0187861658f1154e1d429584fadace2ec52a0b08cbde3d15ecca12e1d7cf12. 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/HUAC60502469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98373780321daf32ed0b116834ca4f4cc470aa52056de001fd7b53fa77df66ca. 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/HUAC60502470.