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 0x49eb1f25c0ef90ae9dfeb456fb617cc9e48aebef74f3a9adcef55948e21a3fb5. 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/030b15bc-966e-4175-af43-2798550bad47.json and https://artists.proofprofile.net/proofs/artist/030b15bc-966e-4175-af43-2798550bad47.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 0x3a25c6dedb1fbb24fed973ba0f8218673ba8e15e0f1485de763cc991d1a8d62b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CH7812217981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ba2bc6adfb81a15a57883736467c95d4c141b07204aacd7583051f5168299a. 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/DELJ82024900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2d38254371b13f5f33c208ab4dd4b1ac016e8ba371f3114eb388371bbd7fe8. 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/CH7812413314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aaa9c49c80b51488c359ac6cf5feb0b997699ab54a41bd1af78654ac63dfbc. 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/DEZC62405369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9913fe8c42af2aefd728f510c3336c282801eb3f94efa88978ea71787a3d43c5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE3GO2402001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0895caf5108e9dd42bac0c17a5c63501c82dfa688c6b8db8428dafebed7ae97f. 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/BE8LH2300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb968a0c467bc6c87e630b3595096640b5ff445f57671882e68c423a8a6e81aa7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH7812355971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2938b604f7f3243cf8b3858dd0582f2dbac2d5a769944b2022d421106194ee34. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH7812352562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9d4491c3ed4bfc341a78e45903ec34a37932df293aedd589fb1ac57babd051. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH7812343249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e168036bebb1c089aef8ede3fd8de5e14038eaad8eb3b644ae7fc6ff9a7cf7. 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/SE3GO2213401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc590e61156e48bd5f8d588e2291b09d136552b731da4105c74ed9ac23c90fc1. 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/BE8LH2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2eb792a604f0575c23a55da61e37a13fbf00121d4416b9986141a12fc605854. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GX38U2243919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9101d9a35243c6cdf57fc39d772f06cf52dc8c80b09a34b18c5bfc81275579. 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/QZS672129544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12c87d98c6e5c8718c1293f401f2fcb4709caecacba7dd39c41cdde50d658cf. 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/QM7282073913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ba2bc6adfb81a15a57883736467c95d4c141b07204aacd7583051f5168299a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DELJ82024900.