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 0x2e934dacb38d32be587e60b3206aaf3833292a7ba13f0e9842cca0e2416431bc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a573154-3c62-48ce-80e0-bf205c12438c.json and https://artists.proofprofile.net/proofs/artist/9a573154-3c62-48ce-80e0-bf205c12438c.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 0xae3545b247c39bc11aafc91f1a907372dcce987b4634ea939a381c5f3d890f36. 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/USEAX1502458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c536c47f5fbafe624b791809d517bdb18b3309f1bef444b7b7ee079d095e18c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USEAX1502461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31480b69d610f4bc1dade1bd1c5b49fa45115ed169e029bdcd645040f4adc5ef. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USEAX1502468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637d1c5ae1717141ea1306a50d8a67089fa8f08278b2c56f15f8f7aefd66d4ae. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:05:32Z), 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/USEAX2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf7826de674cb9a83c5b99238dccba6fb28d746b5412a4cea378db698c0c571. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USEAX2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa6794b07d1c337163bc5821b0e5f8756f53fcbedec0898911c05435afddbf4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:16:23Z), 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/USEAX2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9743aba78cb4675831036ba41d7306873bd7e4ce12d7893c3d9e51d743b20fcd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USEAX2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34c6b205de98db0f44201768d7db18701345618d6aee1a3e726987a49ff3e77. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USEAX2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa334b5e45387718f3a77453d5a3509e88085e9867494d7f90000fa04d57a7f52. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:19Z), 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/USEAX2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5faf6031c6c5712e313594ec7badaf855ca3092a2eff185b5899ac627b63e9. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:07:52Z), 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/USEAX2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff94826cd4a5f344e2c1bad7b70549ecb27808aebf5a052a24665c3ab271d9a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:27:39Z), 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/USLZJ2303610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe278678be10be643a83672752f5b71d44f2b1f97e38c2dd81eb96eb9d521599a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:40:31Z), 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/USLZJ2303615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17faa76d2cc3f9049a2fbe1c1f16b3557e07e6569a759fe0b8a46d3c4d6a5c25. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USLZJ2303630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334c70e454f9714a0bcea4453385372526e9ce343f6b8a30b1482d7d6deff61a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USLZJ2303716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd26e7e533a457d5ab754af0fd6b0b2f44466921a690197c03443f73d37b0862. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USEAX1800084.
The Vault: The Best of the Jazz Jousters
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e2d1621714ed1f814b8482fc57cb6d66a483d06090743b612ed6600b7ac56. 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/USHM21551561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7452802c29c174a69d5785df05f48996015de2e8a91b9c91371570209b394709. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USEAX2000022.
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