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 0x395b013ac11e9bdb4ad22286fe9fcc64738d52d0bd126ee43301bcd17c2386f3. 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/3857e909-8486-42e7-9018-8eacc0f507a0.json and https://artists.proofprofile.net/proofs/artist/3857e909-8486-42e7-9018-8eacc0f507a0.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 0xe17bd453cbf222a165ac4db9a146cfdb817ec8043075932da6a2b913508a907c. 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/QZNMV2328893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55a487795e07377a1d286a27962f88d5dff27599b795e294a4fd048d97f11b4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNMV2399826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d24609f00bfa9dd417d25a3a575ace83ae3d31e0eb361206f798d63a9f59773. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QZ5FA2350188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0095be3311a7fffab7945ec14d6828f318f101ac3b8848d5bcb435308a2468c3. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:53Z), 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/QZ5FA2350181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb70d1b831001314a07267043f0d616246a37af775fa3174a71c824435d1b1fc. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QZ5FA2350182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de16f54e054a68eb0c3c893cbaa4722914a35f3fc0a93dc18d7a6c8a214fd59. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZ5FA2350183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900870ed8130493ee8ce1e9aaa7745a1f2e1e1a1ef999fd3c833923bb28e7441. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZ5FA2350184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e09b99711d54a2681cf676c7ee937667f5a66a4add2d0b41b17ba114211ca41. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QZ5FA2350185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e28b65b180f91bdbb288c459dd4db4aabbd4d3cee082ceb66136b1872aa1dde. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:28:27Z), 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/QZ5FA2350186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cfa85d5834dc81fd121e72683b178524a3a84e336e6228974aa055ac19b487. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:12Z), 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/QZ5FA2350187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b13a09ef62981ad9ecde9d1c2763626afcbbe30154ec543c6f6725cfbfd9980. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ5FA2350189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb70d1b831001314a07267043f0d616246a37af775fa3174a71c824435d1b1fc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:10:49Z), 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/QZ5FA2350182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7751cd0afbf366969923ce15b387659411974286fffc2e330192a66aa84a4032. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:11:53Z), 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/QZ5FA2350231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe6fc85398f50f17d8c6b26f1f114eebccb9eb4f6c7a576d635efa6058fcbee. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZ5FA2350234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24cbf360849543c91025d732558b615ec29740b2cb9c954af59d223523ec6a8. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZ5FA2350235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b00c3960faaa406ee9e9636797ff6b4e4c6439aed4557601f14337cd4f43188. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5FA2350236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c64753d0a2fe6134be3fb53b2a3c869e0fe20bc09ef364ec9c7ba198ed4770. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/USLD91754910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e812fb525646c31886dd16c6ef69c748e3dbe64d7a99ef9d4b2aa3f0a7c0bd7. 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/USLD91755552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035b823ee557f7af2214746f8fb98b9d2b48b10eeac766597a30fd2a22228e08. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/USLD91756522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d95891e9bf57b75f141100e1099fdf24a8feb6e0fc967eb6df93d3f6d0df15. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USLD91760240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aa3ce4f32a55470cc404498b521a6415b4860ed8923a5d30c1a77cc54bf59b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USLD91763463.