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 0x520642d3710021aae96227e3c3c4115fc208980b5f6964d1c50489d3e2136f40. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2168c4df-d387-4fe1-a948-507eb38f4ba9.json and https://artists.proofprofile.net/proofs/artist/2168c4df-d387-4fe1-a948-507eb38f4ba9.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 0xe74c418a5fa58dc68834f59f243b57799b9dab839afb3b955aa6aa1456131863. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZXLZ2359348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166824eefeb7f112bb2725ea4c9da65f53e9346694336248cbdfdd0b8544646a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZXLZ2359346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7dfc8774993d693df615e350a809260fbc7d36ea5d7bff48f0ab5441f7d159. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/DGA082311614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9613434666480d114efba85cf1cde23ea03d72448f719f2d4205f53c81b74445. 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/DGA082311615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc7130944a83d66a4d524b2ec20cf42a105e77730cd4e2cdca1f23cca4d4467. 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/QZXLZ2359341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3283e999280db8b104492c9be8f49f5076d6df6c853b28fa3a9f12b5f178ad77. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/HKG731681911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a81862d1c4b2124526208d43fa2e45f2deb728c64c60310c3a175340d56fd4b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:33Z), 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/QZXLZ2359338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ad831d0956753c593da89a13923d010e05dc9adb03780eca6f525f98c60b9f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/HKG732406961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c71036a1d7842d3e1974cb0577184d7aa5eb93d6e93b2fd7023812a1af0d6e5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HKG732406962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e4dc5f01793f2a275bd2ae21d5a34b58588339bcbacc4f8a1acecadb0e3762. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA052488463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f00900cb804c3d0a46e1a166a08f90b9909fe599c77383d11cc315d7c7612b9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/HKD012473655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc09bdccaccfa6815e6eed0042d7640964e3407513ed1acf92b65784f3e183b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FRX452523936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73a729e58df42769c5dc99b090cb7065800da53a8dae06109840500c3688f54. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX762554669.