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 0xfe10576d089b866d1ee06c41a126b7a974afa1bdf5aae32295230692cd6ca56e. 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/d4d05f4c-6bd9-4857-bf8a-ac371d29340c.json and https://artists.proofprofile.net/proofs/artist/d4d05f4c-6bd9-4857-bf8a-ac371d29340c.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 0xb59b17793b29a0791c3370ce4cb2b4cbafc0fe45934ea961ea5f2d0dd4805e75. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/US22K1100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44763d4a3976c28155718edd48b0ca066583e7e827ca383ca5fa1122463c9f6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:54:39Z), 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/US22K1100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f253b9e82563445822b182d451f8276f6aa61bf8ab19d8ba5e299190c9839. 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/US22K1100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf215a43946bda25cb77a2b04207dcdf82f5cacf44ab5581419d8667fd3a965ea. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/US3QF1700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bce43c97588b4320c131341bbc943382b6ba0f67876f68b98897f6306ddb83f. 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/US3QF1700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56cee55368051b8be2179de452d52b7e28dfc48e091d2b3a7615cd6bdfc60f2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/US3QF1900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6de14decc1b28f50de636928f7b856d81c92447dd9ea49c9c947ddd2b167ea. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:06Z), 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/US3QF1900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434c1b09be49d99d952ceafd9367dadd3e1ba8c07a1c6cb3fb5d63ef53932c5a. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:17Z), 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/DES562511899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03254617e0535f85577ea83bb5d8fd2820d19df139655b40cd2d3d7a04678bc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DES562511901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6064ab84cd7043b166c74f19bf01e77d4551ac07cbb83526fcd09dd9a18e409. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DES562511902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32a1a7757d161f351a571b5d8232e148cdf4074293272d2770577af57be19a9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DES562511903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd777242875df7ed02372aaa8426b324b4fe19d197c6d69f06755ee47a10bfd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:46:07Z), 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/DES562511904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86203f29f2b11991b0835c232e69e515f060c5d59b4b4ffc784afca19be889ed. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DES562511905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa41be1dbcd13422dfb016e4fa287d938a633147c21a7d6804f721c5dee5b72. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DES562511906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f3851d1a067652299a857655a96b3a0d18fe4028e9bafc3914262272d49bcb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DES562511907.