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 0x2e0d0d7682aeab6bac6cd784aecb929e75b13e7a67be93ba1e3a5a8d38e36d0e. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1296d5e-44ad-4867-8dcb-3a7746069c65.json and https://artists.proofprofile.net/proofs/artist/f1296d5e-44ad-4867-8dcb-3a7746069c65.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 0x1a9500cab239851f35d1bfe9ffd65075b94811dd8309280d056b888cd96b0d82. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82147786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5aa3600934bab7cb8f0fc1f74cd332d7c76d2f28b6825c3d6b44f5ba5ab3e4. 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/QZK6H2169723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82d48294ee5c7538612149464e234eb0ecfd7a27d7606c7694671b20534a388. 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/QZK6H2169724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7b42106807f645ecb2869df738632d946686af8688414961619af953a5ed55. 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/QZK6N2133092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b441d608df8d1602f895f5cb5df582faa7f23e5ca4b2b68d0c55316670feb22. 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/QZK6H2169725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d2ff27a739110252a3ed271f2048ec3f296153a19c580c66d12b98e2915607. 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/QZK6Q2140153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb72ccd4c5d911c3f78ffc1b10762ac5d37bcf43a5688372ab3cf1fe7891466. 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/QZK6H2169726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe145c2cb7a53a503d14d673f6279c2e35f71e1ef6109c7f013dfe4f4ce890fa1. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:08:35Z), 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/QZKDK2178369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11de92980cccd777cd7c55adabb5aee26b02cab70abaa8d5a4e5b544523e0cf. 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/QZK6H2169728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739d6731b15b8f8fc1e0ce2ae9e3662de38172a684a0f39957608fca838bd060. 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/QZK6H2169730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a766609e256c61a2a831ec9970f70023a7a2d1e2f83bab5ee3c86ebce06234. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6H2169731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8638a502ae7c7821300b33f0d6126b93c3135ed48087f469602903cc85dff6. 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/QZK6H2169732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329d2e2bb7397f01c4dbf28ee6bc226cd6bafe118c205ab7bd7ed277eb6fc583. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA82215422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95987f31e7b9e32e08e1f225585cebc600e3ba9b1aba9ab48397589f3edabac. 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/QZMEP2378651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ef209af0d8549debaf4f076a4a96a4744a77ff3098055b2d821f9c3267b40f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNA2318926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3dafeb0648046e8af7b6cae2d34a0ff1963484d473464119705e6bf901cea5. 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/QZTAS2228358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a233b3f34461acb9545b4e4fb2d26576073adfe37ecd6a2b72a402ba2fd4cef. 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/USUYG1422397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35abbafe1c8a4d32fee4301fdb8dc4b4e9df0d3e79761c13a70ce8c90b25a07e. 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/USUYG1421572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53a60540acab99cdda12eaf28e802012e89f49effa80ed4a1e6fbfbbce3d73f. 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/QZK6J2120893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbebefc201a3358fd850072ff5bcb19ff81fa5c9ebf014faa96678fe3eb09c4. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZHN42521444.