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 0x57a1c776993495127d223692bca905505f5bf0d2ab4d3de47f5163cdaaa48543. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9d49a73-c013-40a9-b9b5-3fe6724ee4d9.json and https://artists.proofprofile.net/proofs/artist/a9d49a73-c013-40a9-b9b5-3fe6724ee4d9.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 0x93ac254b8941f3758e84b68e41e097354e27bd5bca088622b7506d85e0bb18e2. 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/AUMEV2463573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe859eb4e6d9f40be7650fb1a6bdf6cd017d1910e7112629877c38af0ec8ff32a. 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/AUMEV2463574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dcf84c10a134a887227f064aa68c157d0361f75dfa5706f41b86e6a99402e2. 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/AUMEV2463580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643af70bd9fc6ab4e4f8105554a5058cf05b6bc3a1b2640305ca5bd3ee38bae3. 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/AUMEV2463582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79793d3047f8a1d135277eddd777d70833ad098393ae577cf67e3bca2229370. 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/AUMEV2463583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a534783078e910aa2571d4c1239803e391d44d2f57971fe199aad1cd6bee34. 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/AUMEV2463584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4cf6b5db32324cb504f10d432ce3244b12f17e0eac63afb5d6200a601427e4. 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/AUMEV2463585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769a6d6975627bbe7a72bcfcc16f1e3044cff78136b1258f9657b00fc60a3419. 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/AUMEV2463586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f272aa8e60714d89de2aa627159942a67243f82382a411d61bf2d3ae62c91. 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/AUMEV2463588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f0cab6508034097c45a0f74702c37637501098513090d444164bf9aa01e16e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:56:59Z), 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/QM6N22532407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13fe264a4a10867784b665eae278ced51999d406f791fa02892e20c065e8f4c. 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/QZTV32419037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba2372eaf648f8b42cdfefccae0e91c7a03131e7104c9b3965cbf5176d87f42. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUGBT2329777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91081eff24ae3403c4185a82e5569c3faf124b252b9df22ae59e5463c8aa4c67. 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/QZWFL2352635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6079a53fc388b256f5a4aefbfd1362ac7152c3d1516e326a074053717d72b75. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUGBT2337514.