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 0x92f2ee1eb43605b340ff38fd472aa384b6fc72f4b5f46cb4cce9407586c4546d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61dda6e4-639c-4b08-9628-7d652917598e.json and https://artists.proofprofile.net/proofs/artist/61dda6e4-639c-4b08-9628-7d652917598e.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 0x5b4216f24d89ffb16b30c0451bb9fc6bcda230c1953b35fcf49ceadea866a541. 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/DGA0P2316750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9a281ad8f8e43ecddb1460f90111041ec183e9edbda768bda77655d3ac987d. 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/USUM72017930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fee2c11cd26b4b32768e0262294242a888419cfda072dd711ffb82abcf21c89. 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/USUM71920993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa368f5509260615f0f3d88075fd387cec22b94de4de368463faa09b948ae7d05. 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/USUM71903131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322b13991f7884457a23a7d27662f7555d5d8c083852048239868c06993939b5. 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/USUM71901989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1fb85d45ca5e81ad505cc4bf1000d9aea66b75dc1194ded60e4902cf5f076f. 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/GBLFP1840355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787d420494f88da88c0ede3dc30dbd0f47899b563678608b406b3d19b2e31616. 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/USUM71822241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914b35a16de60d04931753e8be444bf0908afb8bf2575a227ea73fb42939bf36. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB2004599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c60fbbe23415fa750d0c528d6a1c7f273d1c00fe1860ad7a1ac5d49890ffcf6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB2004616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e74fa9f0b2378c1636ed020485d44155d278f55a3a52da85b6563afb9b3f10. 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/QZ5AB2004624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5008e4927fec5233cce810c4ba50687442eee4e7d2ed824983073cc75d910d2b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB2004626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bf4a8ecbc13b0d626dee2d8f5ad4f82c80e8de9468d4a246d379e6c91e1982. 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/QZ5AB2004671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824ad078842e9764a2bc6b73db791caec5a9e4f1a36b3ed8769696418770ccf3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX53U2089366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2434fd319ee0553deb48746dfacf647080f380bffdc5e249b5acc877dcca10e7. 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/QZGLM2208518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e505e7e10495cad14a592161d7615fb5f7dfcdfc3e0e13d1ff499dbc274eee. 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/QZTAS2128361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18066ced5d3da521a8c8149a67d20ee40fdf127837ec10d0703acdf03e6b0c75. 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/ESA011689059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f92b48d8a534d9f986e2de690167a33094bee14b3d9e1a7dc22140b8a206cad. 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/QZHZ62169910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f3ca25a788f9d83a933dd0fab910006f74991e448de9fafa2436a14792696a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKXN21949483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cf65a0b5173ddba0836eff67a60b58d2e26e612b9d207f87cd3e7ffc753135. 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/QM7282043060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fee2c11cd26b4b32768e0262294242a888419cfda072dd711ffb82abcf21c89. 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/USUM71920993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269beebb951a0d5c77b6dd0a4c96813999d499e5c6a3553e7c191ee68424b64a. 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/USUM71916222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa368f5509260615f0f3d88075fd387cec22b94de4de368463faa09b948ae7d05. 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/USUM71903131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322b13991f7884457a23a7d27662f7555d5d8c083852048239868c06993939b5. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USUM71901989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52450d678cd636f0dbcf6216ea329cbb81fb1faae6edd7c9a531faf807ac553. 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/QZ5AB2053996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc72704e9cf1f2ac204aa267c95520e0f8a52f2384842a30325f1641c348d74. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLR2514558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e83b913154d6c4fa1f5644817d61ec4c06055165e3b12df323c7238b220416f. 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/QZZ8B2431890.