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 0x9f9530f3229dea18b6f95c1fa6b268c3f816dd60061e6e7f07db88f05e623bf7. 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/507c9059-052d-4185-9e6a-b5845f357500.json and https://artists.proofprofile.net/proofs/artist/507c9059-052d-4185-9e6a-b5845f357500.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 0xb9b3cfa5e34c8d0e3efc5e1c48314148044050859479750a3df91f9a9e8f7a52. 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/QZNJZ2304098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57454cd9a5cd21b645bee2331a80e259bcba6c6bc1d215e2ccf437600a508899. 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/QZNJZ2390053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d62268cd58fd9f4c561894e1805978abf211a5b72716c14248e2b6ea3d5354f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJZ2395234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d016c9056e721f7f37a64d4e294e3ce15b23a7674e712f37265f6514e8149d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:09:07Z), 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/QZTVM2369568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dd13965d5f68031c42d783911b72dfa908f24e379fd75d7be17ed0584b7445. 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/ESA092332842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc87fbd084eda156ed5787f046454e2586bb8ed5484f31e700477ba9991c19f2. 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/QZW9L2378324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c3f015d5af1de8e26da3b90e4d8fc41ad12717579492a9351cedec460e9e49. 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/QZW9L2378329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681383d11a789a3b5d5763984e7493534d19d66a94a51e52604e0fb86ef84092. 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/QZW9L2378330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c20e2c92aa43ee1223e04b98851f5a7bdc2f946205e509410438c8f6e9efd36. 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/QZW9L2378333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf850ae09f457c49cf0558de106f9244ac73be239cd783754f4a34476555f9e97. 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/QZW9L2378335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed2c7761534b543474eb9e9300b139f90c51cd7f5c84012c166a9e756c703a9. 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/QZW9L2378338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6681d35288b0872cfcac20038f0a371f772c59ca14b9e6f3fb3d64b82d20ab3. 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/QZW9L2378339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04c2fda662359e2557a973204c57d14b25496fe77503607e5e9c73e2e8c060c. 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/QZW9L2378340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605714fe74d0f4f22a256b31a2b272ec7c1e222c11de0fefb83a00a60c47b3cb. 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/QZW9L2378341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd365a5d2b0a8b704f43a6f4adcd3cc8496adf2a76b59c94e2e399898bc623dbf. 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/QZW9L2378342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49abdf6e196c077bc6d31b595eaa5183d9fbc08966700149231c6190fbb6c10. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZW9L2378325.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ae7fee888161a2e7dfd3c87e1af4b298657a689340126c713717c9dfeaaa9d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZW9L2378327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5fd10706bee13f2a6df87ff34ebf5c05e4f80607f81d646e84afba16616eec. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZW9L2378331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cbaefcda366c4eb5cd4655a1fcdf19fddff4f92cbd95e3afa2cf128bc80b23. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZW9L2378332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9974b4e73d5d6e5721f6fc5bd669e3975f6f8f0436c226132e877393caa3b4e8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZW9L2378336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e31d9b37162c1a67c7193db1cd96788d6c184ca049368421a1e8615c36ee8b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB2422146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dde2a7c88ae10bbb5cddb8853538df70d46042817d6ac9ab4e317ca1554a56. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ5AB2422259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a669467de90aa00f70f3b785ba44955e78cef9e15e508e884bdee2c56012a77. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLM2479505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400b96383c03558205ce7a9e52ab296fbf6a8b40e6b4c9cfafb8c82002b0625d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJW2435589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409a199ed4923358c214cab25c6dca5b41cfebf12c955fced01ac68dd17721f6. 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/QZNJW2435591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48a6ee2f110a700d4f0c9c36fa19e9cdc37bab5ca4fe632d3ac788ab4d43e49. 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/QZNJW2435592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d3075fbc12c5455a848bc8f1c2da1dc496c1e499b47b4d891774d14a38ab34. 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/QZNJW2435593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf187e45427fc359386b86c01ea35914b0cc218b12d88c3df6a7d321e46c61bce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTPX2454504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08823a41b0e5d10e195dd338ff1d1a72eee06fb4fcba773f38bb071303c08520. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTVM2550038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6ea671fea4f9d59a112ef8306a3f9c9ef197fbf75fafe7d435f52b3fb05419. 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/ESA092312587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc04b28f10c3a5847e5015ded801c112f81d375a751e3164669469d2b4939c94. 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/QZTB52485272.