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 0xb186c6b79416afe956f30dcab5e8b3cb5dbb67e1f943e9336660612bf413fc20. 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/7101ce7d-7a48-41fb-9aeb-63dcd260fee9.json and https://artists.proofprofile.net/proofs/artist/7101ce7d-7a48-41fb-9aeb-63dcd260fee9.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 0x58bfd20cf2af475eaa3ee3469ba96e89e1f94e9d5e52bd4176aae26d4e2b5c0e. 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/QZHZ62248328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebcbfdbe914a8af27c44e6a17673131db6646e5459f74cb3f382d58c5be4df8. 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/BCVP52200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711ca221fd3176f806a1b7fa9a7c81bb6e6cdca8ee503a5c69ca2349d21fea78. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ32256733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5de7437476ba4ad77492e355ee26c96723e34205f80d4596e534678cb229b16. 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/NLQ8D2200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1924f124e8853e522ed945ecd9e07527ddd1389ff05d36ba3e2f42a7e4aeef. 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/NLQ8D2200321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f4817cc020379377a77c01efd4af7e0417290c37b0b7107341e7a0a92f983e. 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/QZTVM2137852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c893a7265f9223c252b4b673228474cea2ebf2825e5824938e211910a313b6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJY2115731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792668793f164ed955ede7d9095a3f9e7ddf8f0c00209e0b6d4ef9c525effd76. 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/CA5KR0006655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be0a6d9a98d27a4018090c48d81e28138bc283b3ec23454005ed914128a0d71. 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/QZMZ92092537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c4511491dd01cfc68bf5254ecbdcfe2d4d57ff5c2992851ea96b0c7f16de24. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEH742036974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c1371f7efa40d3ff5b940513b6b0391ee9c752cf76c12dd7ec8f76b666db95. 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/QZHZ32082824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba3e2d70d05f52901a7b3823cbc9ce1481335292a4c56dc83939bfe7d50be9f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/RUA1H2030950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0295c7cb8bd7d840314fc26f8c5a41e6fcabb2377f5ce5d7bc53ce5046d4241. 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/RUA1H1939570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c3b9c8699cc727e0d2fbde8fd836f50ad7b4c5cead20a36c9a758b5f907b9f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US3DF1944819.