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 0x2eef61071c7dc33cd30e5b90c3697fcd82cc6f820dd70ce9c51f1c5844674deb. 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/626f0c1e-a52f-4ffa-9955-a5a4cba4012f.json and https://artists.proofprofile.net/proofs/artist/626f0c1e-a52f-4ffa-9955-a5a4cba4012f.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 0xc39e5baf521960ef6a5a32faf7a26b1a492ef6b6aa448d9fc01ad3088c0b7988. 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/UYM122400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d451d46357fbcc61a8d37970059fbe8c6c3ad30e7550dd5b49c97e3d58fc3c8. 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/UYM122400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d244a34e6c0baa18c0d27134aa32251b4fde8f7251e03b7d190740772a20b9b. 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/UYM122400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812c18c14b0366aa9a6f589f8b59fde4e4227cfc3c6c00baae0e111f916a64ad. 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/UYM122400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286fab2669c456336514a1a9000a7384a6e331177de2d624a9830f7f3ce9b9cb. 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/UYM122104332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2874e0aef9e499a764878304f9ec41752b5c5349046df3c3b1c1e36113798d39. 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/UYM122003642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6173223fecb9826fac04f8a16332340cca59f157f331cc88425e78055a44d90. 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/UYM122003767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946c8617bcd809a538630f62a6cfb1de3a7bd6ee1a38b74d0f15ffb50a3296be. 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/UYM122002229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fbd95f3426b3cea7c48459c41233ce1bb96b464b3c5ce256d478b278207719. 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/UYM121903874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc21876f0ead83e8117a8fbf3bbba07e1c227f5340dbeef99e46a4bee32e37. 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/UYM121700478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96642011dfc5a5540422c0ee718817d4c3a799cd7ba5ebbd6587a5f9a7e091c. 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/UYM121700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e40672adb1e72c30d5b7222891212c33def13aab12eadcd80038ea7efa7f99a. 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/UYM122105033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe6a9baa2f8fd2144142bccf7f26b179f7cf7683bdea3743d289b2c427adce1. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UYM121806642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef08144f6b5f778accb306e361fe11ed5bf42cdc5724bbcbf72801999e3912. 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/ARF051800270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02c0754367d73e9f162b3c8f6e3ed10c4f7b13807f5da178c26520ff2d827f3. 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/QM6N21814717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b8bd218b5b5c3941fa4d6b083b63362342575d35c6b0cf1f19681b2c7a30eb. 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/UYM121704013.