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 0x03f4dffca37925b037a276f66a6baad9d1b959840e8a2d3f9e732a68b7ffa2f7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b7c3b0e-ca56-4f12-9a38-c5957212279c.json and https://artists.proofprofile.net/proofs/artist/6b7c3b0e-ca56-4f12-9a38-c5957212279c.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 0x421372f039194d534759b7b6e2088370830d3d3d52fa334431fa6c28ba359d1e. 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/ES71G2148785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae2fae8d6d1a12edee464efa641ad18c1bb1aba13d610b208fbdecfab40510c. 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/ES71G2148787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773eada90f8dcf5c28307e37a9c7e2272632c43b1ae93166d5822b13f33faafd. 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/ES71G2508021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bda4c529b48cafb9ad2014bb2d33546a9f22576c2add5e3ef247a0d5a50457. 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/ES71G2421007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1c578275ff58583f5a01381a4005eff9489bf35518a526942cacc14dfd4b80. 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/ES71G2421008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629c4ab84514ce6aa26d9fd461031bebe76714cd0a74b2ff52c706f136a42a5e. 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/ES71G2325479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64558a8b42a7af3ec76e3707c6f324e36ad55674e7553c5093188cda9b03ffee. 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/ES71G2325480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3e4e06753a8f5667863c5a667087b309a383c3662575270fc87f8a8fe729c. 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/QZTRX2558353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf094e0c3901cdb7cf9260925241588b86b81ce64eaed29628b1efd355c94e828. 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/QZGLM2541756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6034322bf5dacad0486d7afc2419aa4bd5a9a9087e87a127df60ece5d1cafde. 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/ES71G2500646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa99484caa5bf19a537cca3955d2945de41c97024e7d9dc8c9f4ef229611d28. 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/ES71G2305024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7919a496327df9321447a96a6fb68e3ec5f461e73d02b7c751b66f4cc949fc. 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/QZFZ22347808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc454e01d4836e072154190dd6b9a36d14b27ade536e5a54442fb134a7fde1cf2. 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/QZFZ22347815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6be79e7283481907b4b601670741c2c77419c7a17c3c277feb6fb91528fde99. 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/QM6P42043611.