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 0xf5291098e270fa5d496cee39685b8031e952448753f864889b6fbe7511225b91. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07cbc11f-e9be-4df9-a4c7-e49655bcaabf.json and https://artists.proofprofile.net/proofs/artist/07cbc11f-e9be-4df9-a4c7-e49655bcaabf.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 0xaaa6e37d8bdbd9497aa3e94de90b0c25d5954d95c6efb07d3ba86d61dc775c9e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:13:28Z), 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/ES65E2200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dffc66f32774353866fb05903412a099cc70782dc49f03e3994dab4aa7de20f. 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/ES65E2200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912d71e348f6ba5552fd86d69d45fdf0d888a7f9e95eba195649fa1e2ef87da8. 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/ESA011577601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88141fa2dc96b23a6f76e73ebf134c408d0093c28e6e18a46f7756256fd2ddc6. 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/ES65E2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590215a7350d293cf6591e47bb273eaa88e301a1e171e0a85035f553b90b6253. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QM6N22134898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd907e09f831bf55d7bf3b7a50858b8f9b4cc3d7fd534187ac006fe41c7961712. 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/ES65E2200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cc0759f32e996a098f6741eed0d8d433ce75c1e83d176c471b0e55563f7c32. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:13:18Z), 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/ESA011787280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625b120ace6042d04b8b5ab655f4bc24e6443ded5fa3997c2aa04e1340167851. 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/ES65E2200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebec48f6f8c29d6f611ebb9a368ccd7b012643fd05a5fb6f403658ed092f08cb. 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/QZHN62061514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3938714d49af369235a87518fe7e947361a008c693ec2a9795c849fb86da80. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:13:13Z), 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/ES65E2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15524b07af829e4d9fd3da0d918a390e947cab1da07b7aed87ccab60116940ab. 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/ES65E2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88b4cf3e783d8b93cf50774b2249f3de42d850c136898d52ef30986a18ccb14. 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/QMFME2011767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefe2945a3121c9e738045a80003ce80acdcdb27c5089a8432c43589c43df649. 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/ESA012132392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912d71e348f6ba5552fd86d69d45fdf0d888a7f9e95eba195649fa1e2ef87da8. 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/ESA011577601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c3fd8ce9232f9c274e7bf6201b4836f4fdd45d310d69a35a887c1245c79f36. 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/ESA011526970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cc0759f32e996a098f6741eed0d8d433ce75c1e83d176c471b0e55563f7c32. 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/ESA011787280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590215a7350d293cf6591e47bb273eaa88e301a1e171e0a85035f553b90b6253. 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/QM6N22134898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21a499ccfabd48ea3f29fe7f2be6dc0a02afc89a2664eb5b8bfd1125869331c. 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/QM4TX2123114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88b4cf3e783d8b93cf50774b2249f3de42d850c136898d52ef30986a18ccb14. 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/QMFME2011767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e98fedc8d49f0b7e3163621f56b534f6fa8fee9093af0de5000e5c2d1340dd1. 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/QZHNA2056980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebec48f6f8c29d6f611ebb9a368ccd7b012643fd05a5fb6f403658ed092f08cb. 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/QZHN62061514.