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 0x20064faa8b5f8e2418975dd8a6bf9990a098591edb11056f6ccf78af41f84d94. 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/5e8e23a6-fd95-465f-8ca2-2e04ffc1283d.json and https://artists.proofprofile.net/proofs/artist/5e8e23a6-fd95-465f-8ca2-2e04ffc1283d.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 0xbfacfe34884f57552016cf058220e207638a71b677b409f03ce7cde47bf9d098. 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/GBX721700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89da8cfc04e1faada85863b5680a1e1a6e4aad15438476ba4a44025aeeac4076. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBX721700064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baef2babeb3185d9a9d64c99288b285fac4c70f017fdd2f2eac3cde60dd6674. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBX721700063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece95f32e314cc5a9ea26a21b879bea5378eec8f008e9b67ce135b798a2dbca7. 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/GBX721900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8201c90ae7189f2500544bc4ca850b4086c1ef9dac35155ec0c0b3527126e49a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBX721900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c14ab2b20c199567966b7fa058d0e0f290751add4cda13cc706ba4f06bc2aa3. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBX721900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d8bfcf81ada9ccd5c6f9f73480b4bd588be5076817022875077a7c59276e49. 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/GBX721900540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18761e4e730742ef171505ccbb998cbb8bd9bdeceb41245dd9447c249ebaf054. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBX722200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3ad7a25ee57cb19e9b6497d4d820aad7d7544b511787b983419c0995295bb5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:54Z), 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/GBX722200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6db63e9b6e3131c77d771e0ae9735fd8c0b54f8fe3270b4cf500b8e756406d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:25:57Z), 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/GBX722200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa795a1e477c309a34f7f264338ff025aed6470a61f8edcf357b7a38d191940a8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBX722200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8e62f68ea60289b39c209914ca46515d38cde55eb9c6aa84b705ddebddcb76. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:13Z), 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/GBX722200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5924dd313e252ccfaa3b83bfefb7b458640cc89d8385504a6431db678c6215bb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBX722200312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bfcf32c39ed81474b3ab0007c21d93bb5bf3c425c01124a1af1dcf5c2a6d57. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBX722200313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd08ad620334ca1191a77e2c7803bc99bc6fe96dd5e9b350cb39ea9bbbdd890f. 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/GBGLW1700174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e2e7dabc9d46c9b9cf57421e9808ab6d7b3a1abc7d5b03e1d1ed25ef25329b. 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/FRX282225504.