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 0x69dcdc8916d7385f1230d4372c810c68ae2ecd066d1bd2a6147b9966d5d2813a. 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/928058ea-86be-4a72-aaed-9a493bfc9c3b.json and https://artists.proofprofile.net/proofs/artist/928058ea-86be-4a72-aaed-9a493bfc9c3b.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 0xc7c88efc404d304786417bd72b9da5e9321a9981242590946250d77f0282b738. 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/QZRP52449777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15820e19b03a3b83df697a940d48fddd1d4d1e770da073b4eb3e24f7ec0218b1. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZRP52449778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c851ae279be0d63519cc1ad6f15e10abb088fdeb897d336cd642c30584552b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZRP52449779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663705e15b3ed07c16b2fd9b4e60c271c27a1562bb6400911c4a85603b22878c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZRP52449781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687a4ceb7753d647edb2385db79ed772fe146c4ed71146ad13314a482b83a82f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN32513396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea23509052509e6ddbc6fdc32e98be0e9d3c51121266bea8656787bdf962d0d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNB2570202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ff48d8ff4f51c7b94e0801ffeb5776fe6535a35140c972333838db1fc00a80. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHNB2572115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0036a5972e6e62308e37af38021c830c2782adc0a953a2ea80e1f95222a127. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2572120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e006ea95c1656e7c3c2ff80b52d1fad2d700d9158fa6c2e3820340c59d3221. 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/QT3EY2443789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11babdcc13756a62f250c579c61b26a30d229902d4eb83acd43bc7064ebdfb7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3EY2447057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d120fdd04e9497819f81bb71fce583a492ced09b261acd4b3c9717a87ab1bc9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QT3EY2447172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734491a28ae7371415c8d996d7b10f235f35190c22e1e6763ee199075f94f938. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:34:19Z), 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/QZZ7S2571712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff491875846db691b24ab92b167eacac1bad89bdaf66240321ea28cddd95bfe5. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:06:06Z), 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/QZZ7S2574023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c93ffe587538b3eab334857df889c9ac281c052945e540e7be575d19b5fc88. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7S2576027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecb89e83453b3ca6a3e6afba9a66ed5416724704665dc507a45f0dca80ce45d. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZZ7S2576042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff7ab09e5b029bd13f7aa3a2f60c642b064a755eab5763e19ea440004edb1d7. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZZ7S2576043.