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 0x35532dea77cabfd43900e3a75c0f786cbdc4729824a8047831ae62bbe675f226. 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/1b1b5228-d2e7-47bc-b2b1-37ab99aa4c1f.json and https://artists.proofprofile.net/proofs/artist/1b1b5228-d2e7-47bc-b2b1-37ab99aa4c1f.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 0xf3ef3f96427f09d9c6ff57b3361fd0496ef6667cad2d3a952be4bb20b0f51f5e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBKQU1966641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c990fe975f31e31c5fe494338cc9fa2cd56d2232fe79810abee4e97a781a1d8. 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/GBKQU2082596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282e5b7b98199f05c227c2e96037be9edd5454c740bd1f2e3d9344dbb02ea7ec. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GBJAJ2100567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ca6620665b9c62fc9dd9c39ad950a2a624a143495b0f2d223d46db074fee38. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBKQU2198508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c63a6eb552895e4c6818ae7993929b2e40d6863ea36cd5d36ae07191653ddc. 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/UK74K1400621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964f4eaa7c37b395f5a05a7b93515d33515a212760e9eb39ccdb4dec04264ee2. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBCPZ2221741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88070fa53be7f1df2d958329889ce27e82b99a56d9b2e3dd2e4707249f7051ea. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBCPZ2221742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa423e55952dedcae623f0d72e7e8425927a312e733368e1e5a38cae5419430ef. 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/GBCPZ2321974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c7bcb7f3dc3ca6f91bfde0b8668f024a21acbb184ffa6c4b42dab6d3734a59. 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/GBCPZ2321975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d85e8b458dfd8251521e0943438044924b628d944b9564761c22a7cdd6d40ae. 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/GBHAD2002415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7209ac06ea1be93de4500d6cc801760b8124e1c6a9c70ad89f2f88833deec75d. 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/GBJX32360001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9bb026f7030b6ab2c0a4d9db68024a8d2cd675285567432f267ca75855827c. 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/GBLV62300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147dd6b10a27fe465b573b974d31eb565917c4744582e0a8145a1674b0225893. 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/GBLV62300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e42ca288d69ff4fa6c1b9f9d8ec75e08021d3089a926a1c5109b00edfce3c22. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBJX32160025.