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 0xa8bd03424b1355fcbc004be612c6f738ded3bd1ae72248f8d646f56779c77f7f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5a81f1c-84b1-4f5a-b4da-4f15d96d296d.json and https://artists.proofprofile.net/proofs/artist/c5a81f1c-84b1-4f5a-b4da-4f15d96d296d.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 0xff2d8c3aa2bdb8126228a51737ca0e22c00d9fabbf3ca20b3e25c3ff08b96f7d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:09:12Z), 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/USDY41886484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e54db12c0242617487a6620582dad4b5e69c7a3ed32e7acaf834e1e89f0c4a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USDY41886486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08747a51bae196464dc3ad16af5cbc2108fd7ddd514ead1c56ddf535a4c052dc. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USDY41886494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2305d24e64d1034a95c7d2299e2be4c67d310667d0eed1e47d85bdd7f55ad7c6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T19:01:22Z), 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/USDY41886502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484deb625b7238a51cf00ba5f21de095306794f56e39320d58397933a6fead8e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:06Z), 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/USDY41886503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a90c906e7950a35dd97d2ea8d2929abe272105cdf561cb9c9aeccabe28e160. 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/USDY41886515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbdf16f222da465b262f9cb3b975b5ac0410d9878fa48e128ec011d5864d0fd. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:59:18Z), 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/USDY41886517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0ff0a8dcb1c15abfed6f9db13d6e83e5da8956838b4de1036da6219ea7830c. 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/USDY41886518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46bab2fa4d2ab3bd4cb86103714951c1dee84779641de19077ef589c8332ef5. 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/USHM21864236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22759f6e14565a3087697ba525cf599b8e7d0c2f55af147fba3cc257a7425762. 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/USHM21877307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa604c04a68730278c41476dc2dcd268cb71a6b70454239edf3f6a72e5c574a98. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM21877309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa779370ac27568fcd758fa91dbd0f77574fce88f6582b639d3560c93bf66f4fa. 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/USHM21882425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5b205882056b4fc8fc24c9402f89fd5cad46b53a3c14152c361ffc3bfeb1fb. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USHM21882427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67706ac1d99aa7e29e4744ce824337b5de7a394fdb746a5d32f59b2d412f82ce. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/USHM21882433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc339e93584c04498f2203aa37cf6798f05a99a601031448f7c528adebac940b9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM21887329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6377fbba1115028c2ff7067899cc841d968227b8ffbc73811ec342fde6caadec. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHM81868268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc331fe0a32f214b2ec169fc6733f6b80498ba52799f58746ac02deac2312aae4. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USHM91828586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdc3f310ca612d8c30de57fde385c4bc74b0424ecf70f64f3873820899df7cf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM91828587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8300bd7f3b3f9b352f23d2515e073ba87e3d91ae1b70af62010b10358549646. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:35:07Z), 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/USHM91842599.