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 0x6fa8538f56ae386ba2b0053cb83ef31934c8ca55e9fffa9100c10b4d5e4d7840. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb4eb26c-3ee4-49d9-87c5-e22f2ec878c7.json and https://artists.proofprofile.net/proofs/artist/cb4eb26c-3ee4-49d9-87c5-e22f2ec878c7.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 0x4806815636272548c27fd37d662a04dfd6eded51e536fe2fa523cabc0f50c1a0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:56:47Z), 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/NL2J92400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa9c32bcd61034e707a5e7fcd4385b9ef7eda4f1e346addcb1b8955f1289fb0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL2J92400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeeab940ed6098f1981efb0794523c1ace76cc58e8dd9f9bc139af8934d5e709. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL2J92400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b253e516f6ddb27bbad462a7ff2f93433102ca38cca9ec4c5c460043f207d49. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/NL2J92400294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261c3314a6514f111a463ed37f951ad5d889c2e96359e0a30a36b3984e3b4d16. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:07:08Z), 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/NL2J92400295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60874f023d466d1a66904ec74b8be340e01b6c50500bac50826443a36cbf9116. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL2J92400296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a053499f0220e2a8e44d0ca172d3ef4f63d0ecab2a6a47787cc543e34e137d1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL2J92400591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc0cf2ada12935aeaa03650a3ea88545fa4910c7ae21e295b8ee48aeddf8a0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:00:01Z), 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/NL2J92400592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e75f1e323562b763dbf729678dfdc96b08f2db86e87795062b0aae21551959. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NL2J92400594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5b69b2428a9c01f656b4f5427d410c23e2c8d53721f8d24023e75cc43e94fb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NL2J92400595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7245a881107fb3b0a49693078338dda97aa85c105e27137941535696d53208a1. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:11:25Z), 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/NL2J92400596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fb5eca1afeb963b9e8537b7c90b711a75e241061be089d94609df2ffd772d4. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/NL2J92400597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3110553e09e4cab019c3ce7e84e866a49addc5f7cff9ec15035157d292e7b87. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL2J92400601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779f8e445c5855ad6135e743b1c1cc4a304cc4d016c9ee9f46b1d84a2eeeaf3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL2J92400853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec894d31eb318a7c7829f1aa2e4b94fc074a561bd1eae66d54893ec9725a12ba. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL2J92400856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecf77b64a9fc4560a2ad876e26d959f43099ef2a8a6ef620a3c3941071f0515. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL2J92400857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6241def1a2d59057047acea26b95703655a2c7a1377577807568e9112a24a7e3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:44:41Z), 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/NL2J92400858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f68bec5a62769270e2b64ae4c5db1e90b4ebfd1b3574265766a9f01a530e6a7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL2J92400860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab042cb2913ab85911edc43a3343079df6dc18dc342b5964fd9c623f023a3736. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:52:14Z), 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/NL2J92400862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe19f52889bc88384430336fd193453ed60328fdcb92d7637f9ebad93e2aa947. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NL2J92400991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9814c623610981d79079977c12b0534cce602e5bebbc00365615e311a69bcc18. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:08:20Z), 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/NL2J92400994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ee2afbaba7b9b7eb410d81d415aa416d639efc46bffa200ab115d3f1fa81a6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:03:45Z), 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/NL2J92400997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1142ceb050696b0aa1047de2fa06fc493cfe483a61c6970d1529f4306421f074. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:00Z), 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/NL2J92401000.