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 0x2d3d78c80e138e5993d408c5f1a6c120eeaed379f7b8dd0b2896401f8e210048. 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/135af937-f5df-481b-ab2f-d1c3f014c691.json and https://artists.proofprofile.net/proofs/artist/135af937-f5df-481b-ab2f-d1c3f014c691.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 0x5e881d64abe7b215e960b611f83d3ebf4a4ea9fbac02a767c049282c4de44e5c. 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/GBLV62132629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042cc51b87a2c24420dbfe794274e30ab4193d94a2053a97a722e81cd60af46d. 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/GBLV62132630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe26dd19afd69c862697f234d4e5653696d0c9ad5ce35e4a1fd1cb5e5154acb. 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/GBLV62132631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5d7ce73d7a37992baa5fccba13b6668e914416dba33c9eca7f5609ac6bd998. 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/GBLV62132632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93a9e4f32f5e3467e7b8eff7ac346ac742ea92160c33131b947acad40f4af1a. 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/GBLV62132633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dca08e251203f1b93724c663cd7c0ba966ce3a46c4c1936d88e1694a30167d7. 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/GBKQU2204520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf98eb47586621478fa5e43e13b342d6309cc1ed4c3a9ae1af847d32532991ce. 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/TCAEW2004781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b67cf7941c2aa25801e888897b11186a45a3cae19a31834ac7df57f0c307b9. 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/QZN882394956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e3c5d9e6f51813e64617965e2ee21a6db166682f296173cea7feb7f4d33efd. 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/GBKQU2268251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3630298f38ba58fd1b1807e941ce12bd71b609ba854c7eae3b0c27aba6950a73. 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/GBKQU2268252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e7a3eb4a6fe2e91f732c5e7c4bf940b30355f46854a8c4981074a7f4ca55f8. 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/GBKQU2268253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5b569dc04d1bd16bfa74ea656e5b6381eddcace8aa2b0cbc832c8b0aa32892. 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/GBKQU2268254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a80cb1065e8c6e79dbfdf3c88994fd60e29d4421a6c4a02fb3f788a8464123e. 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/GBKQU2268255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82075af6887a4767cc686da7c3b81308c87832b1314336e98dbead589dfd3a8d. 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/GBKQU2268256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa165151cc4afca0bb8c8abfc07283a4adaa74f494e36c05e950ab6390ad4fcdd. 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/QM3DF2289067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7a0c90b1b2d2455d657a587cb83ee37c183fcb42acf7bc457934338bbde7e0. 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/US3DF2452665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dca08e251203f1b93724c663cd7c0ba966ce3a46c4c1936d88e1694a30167d7. 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/GBKQU2204520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a101de545bdb9b8cca33e3dfee7b14e35d0e4ab7c4882f7842adb9b21e64a4. 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/GBKQU2185235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fd20feabe54f933127418332883deb68fdc133f7d182253d7e4d15f2cd2089. 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/GBKQU2185238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e68137f4391db0c3e6445a5847d763b2f12e0b7cf2cd666d1de49cd6fdd4239. 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/GBKQU2185239.