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 0x8919ee16a85fd096c27ec0da0ba546a8c98596f9291b0911b5725071e05af926. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf4a644a-2189-476d-8853-950168668375.json and https://artists.proofprofile.net/proofs/artist/bf4a644a-2189-476d-8853-950168668375.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 0xcf6584b59b403bd49e1e4ce58dc8353a546ef97021a06cf96b2e260908b395bb. 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/QZHN42423545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e5b39d022a42453c17b2c454ee24c991790ceef93a3476ba3d4b7b1a051e68. 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/QZHN42423546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447330a03a6568102ffaa1a5750c338c671d14dd332370c781401c5925f3bbab. 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/QZDA82408388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeba1091c690e509f652d448dd39d09312f8a3b7e6e9b65880230e4b40400eca. 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/QZHN42423547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4febff3f2b952fd200e7fe530a1a87958cf178c7914dfcb5a215fda0d6b577. 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/QZDA42446873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b80691d4626ad53d8d58be99013ea315cf6a7f4845e79a1720dd390a813510. 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/QZHN42423548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffd0f454ae0e9f56c3941d11f6549507d235d5e85aaf9fc3e35f49accca085e. 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/QZHN42423549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c507dfa8b4f50aa811d62cbd5c933c4bfaf25b67850ef8fd4ead4b4d7a3c030. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA82485557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20317d557217d73f9be7f049026aadfe89a3408dc1b8d0fe5db96a57f4504d27. 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/QZHN42423550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ea3b498824630d174082ac7fa87cdfa70714ce8edeab34589528ac5a7844cc. 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/QZHN42423551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7d5534f506b443b78a54de204a5d550b2858479624fa8e34c4adb225e9ae33. 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/QZDA82408147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428b7cde625e3f3c3864bacccec34c08043edccb80b643a37eb3d69dca342190. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZHN42423544.
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 0x76f15ed73a907240c8f2c7204dbbb3643898b0f69518bf09dc6969b7249c03e1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZHN42423552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deb0aab440cf324423162a7cccef2b5f3176fe35a11fb6d5698cd14290226a9. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZNWW2475406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e349afaa5d64e335212944fbfe191055ef228162a3604756422e0f60eef3e1. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWW2475409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5259717ec20b163311ffb7b1c6a2171f394f3f9a38dbf49a874fe09ff40196a5. 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/QZNWW2475410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c193310ee61f0e442b9364702f62a5779366c3d5d3e469be3193e35c8f4c086. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:26:43Z), 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/QZNWW2475413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445b15447f24a7f02482f101932d81f3115a4d349d7fcf899ffa340b6d4d302e. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWW2475415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742e9cfae4af8bc8f98158d02954261e66e077531cb2efc11d71f22c9d6a733c. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZK6K2571280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653dce3194515320e2b1e863f4fdf37e436cd3115505213e89625e7ca7103190. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T16:00:19Z), 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/QZK6M2549796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d68b989e4720e8f0898d733895a533965db759aa8ed42c3d01d0cc5ca6ad47. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6J2558004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799d19ca672e545fc5ee46e76739bd305b49d5851e8267e0172b077440e45769. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZK6K2571282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89888466e268b669a283a51fa595fe5daf545b15e6f987169d1ac563e10c54f2. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:56:20Z), 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/QZWFT2562076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa98a5378b5c5409c6a659dcd99893ed0006eb985c8da659bb0211832d0c1f2. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZZ7M2515676.