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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60d69077dc77d7fbf50a97cce777ee3939339bb86d8ae0439ad999ec81a84dd. 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/01282a0f-b493-4219-8349-65c805ac1c4f.json and https://artists.proofprofile.net/proofs/artist/01282a0f-b493-4219-8349-65c805ac1c4f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8c98a3b93440bfe3788eb5da219057c8c289c0fff64047f713eda71c4e7787. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HUB871700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596e5091fd601755c0888f3e81b51461a42b21987b076f05bf9c810ccc9a12fd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HUB871600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cb6ce79f455721995b93c0700558ec9bd35933fddaa7c9cdb158f1285d5e65. 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/HUB871800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbe5187c68b8824ae163e70471eeb3dc810af4ebd7c82e7e427acffa0f76fe1. 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/HUB871800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f22eb6e4dce8caf3d17b286cafd2761af844d1833311d37271016177c9895d. 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/HUB871800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fff23ed1472915e239ae92ee5f68f6439208e5f987b71d1275b76e09f04d7e8. 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/HUB871800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ba967676e4a988387c35ded5f7d77f2bbb6862aa316b51000a801826fd3766. 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/HUB871800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131ab8482fee8915dbe80d342f9346af4a5df4783a8b095fae9c27cf28edcda9. 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/HUB871800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1d6320d1abf4f55a29bbea4978bfa5eb2633938ae4287c7333713344d43701. 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/HUB871800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51727dd23f211888cbb5756ca0de6f9105fb7256902d5b69bf5096253322b45. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HUB871800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba63dea28dc558fa9531fc4894d26dccc00c0adc27c5edac3f0057a0e615bc5f. 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/HUB871800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26d3e22f4ac7decc3873afcb8d4d5945d329bff53d1cc5911378fbdb923cf5f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HUAKG1700999.
A szívemet neked adom (A Szívemet Neked Adom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9599331c1dda8983769a0dbf6f5c00408babce096225264093876cd7278fb95. 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/FR96X2330193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ba967676e4a988387c35ded5f7d77f2bbb6862aa316b51000a801826fd3766. 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/HUB871800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294d53a4db56af2a9e4137c180036813607a89a5634c0c16b1f9fb51491a19e2. 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/HUB871700030.