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 0xbfd1f9a613bffa78618a8b4ceaeb083b50763b5372f14e7caf75de2776535a87. 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/0704d35e-3d4c-4983-b219-cf473713eaab.json and https://artists.proofprofile.net/proofs/artist/0704d35e-3d4c-4983-b219-cf473713eaab.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 0x3963b4f1b363138a3cd778c01fe4a7eab2483a8592cced78754fdc80151f8262. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEZC62113976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de40be31b3f0fb0ab9e64a80d93a49c0bbddee8b2d39b241664577a58bf05df. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZC62116597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe304ae650a75d48494f44aba71f07179abab89896e6fb479309fe983f06a0b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CH7812231014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab22b8a5bf525f1986a7fa5151b50b4ae9a5ebf9c9d971ae05e23cd552c92fb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH7812232783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76daeb23a0fdc27602f1509b2ac1611d6225e495e0816cb0eb543936ed633773. 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/CH7812235086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4cbcb307403e44b7a96664030918e2f376f1109b7dddc501414f77c56d7d7c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:35:45Z), 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/CH7812344688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a0ecc021ad389009746476d81dec587fc96a5ad7faf46ec3f4bb1ee972b396. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:30:05Z), 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/CH7812346776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8331f3e1fd23bf8cba76a87c4822ec48951c3795384e0f61e0eceabeeba26e6a. 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/CH7812352504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7389a74448942bb8c7e5ed395e15396a21330bfd48095fff071fa05ea4b844. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CH7812355817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bfafef133bad5a6efd40de83eef31abddfcbbfc5893f22a4d8ef5996fc8794. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CH7812363575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70a6de987a2bc30bd61d764107f66d6e72a1cc31fe998491c8a414291932ff3. 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/CH7812366879.