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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d98ca9328af6a5737ede0446a0c538c11b4f14f86ef47161b29a04374cdc7e. 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/5e7b8cb9-1b49-46e4-80d3-f76af9d3fd5d.json and https://artists.proofprofile.net/proofs/artist/5e7b8cb9-1b49-46e4-80d3-f76af9d3fd5d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986987cfaa3c4802fc75f557cc682d06d41fedc307a8aa680a3a13624f07c4e9. 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/NLF711502390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb660958cee9829a97b287ce67fab4512fe565554cbd69575dbe992e32f04def. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NLF711404236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5047345575de359ff8ac5dd9585d8b92f00d21b3ce788e08dd87272da915455d. 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/GBWUL1901086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236d4279b709594ee7e5bb9a73f15d824d6a251e969ee6067dbda6a0b1ec7751. 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/GBWUL1901089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f730f490ef867a29244d5f7c3cf5d01764de94980a81debe54eb149fa01d685. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBWUL1901096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66e819ef96415ae91f5e03db04c28b70fb27c4a38bc9abf5e9dda518fb0a640. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBWUL1901099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225f47caaa5b5c13f3ac4675332535631cf896ea07252dc96af0419af6403d6c. 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/GBWUL1901102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5664f1b00df9e37dcbb44b7141bff4199357bbfc23afe61100ac75f83021b2. 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/GBWUL1901103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f180f37b59e6650609df6618a38cf4201a6bc646b8d5da334e5341af09968d. 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/GBWUL1901104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc410f73615dc0430e68a433a2056ba5d7119780b5555793d9dc1424ba938eea6. 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/GBWUL1901105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39c43b5f77426f09a17d8202f1804f0c61e55659c51a061c465630f42c98820. 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/GBWUL1901106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8688064e121a095b96118b6bb228cc61e7074ddd128643d770cbc8b13f10cc1. 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/ES5022301286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ada2681c754051024e175f16183afc1a877e6b375a595f1c92a7c6c8ed150d. 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/QM33K1700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4beb751e78fb045ca3b18ddc8f5a5e7688e7f86795f878d3c733ebb6c88c6cf6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSM12207207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23851e406f49dadf140a671ee4dba3382b881f247a3d10a0062b9be3b411d88d. 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/USSM12103949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed86a4276ba055501533c5d93d727d563b926a7ff359f5a14b5b1a0df4c4b78. 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/USSM12405673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0648848c45a4736b1c99269165820fa8a54efbaaaa0faf1b0bd1653f7bb38b1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUS12400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2c9832e5a6a81e4af67d7b37c271970329c1463b548f1b250f2d0dbafdd7d6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USRC11901583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d748af832a4a121424441849e845de49df0586995897c9598aec687453ccb1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USRC11701901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54f72b1be720542373dc4334c9710ae831c1758a7cce7a29ca7a023b3323811. 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/USRC11301176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbc0b6f4fbb0d98277fed5cc498912f3cab5be217c823468c38fbdf0f64e12b. 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/NLF711502745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43945450ce153fe4a11e0d33d58a7c2cc18a19a86c2fe3ae99f3b5ce7c26d48. 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/QZK9T2100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cd81e9abbf07ccfe044b9fb9b369b8dbee8ca5f9fd0c17a70c52c3732aa8a0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX201937667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af8293dfe7a8b8a970605a90eb91f2fa86b322e78f5a1f5ddb6cd595666d9d4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX201937668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c1181948fb87a5e32e06e27ef2e46d803097e275f31f01a8266b4b243ec708. 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/ES5021900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4bb129f9670131d9a81159c69d4fa397855a6f98aa32df678fdf6acf66a324. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5591600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51179de4c9957405a1d2c4d9b40a5ca1bf17f02f90dcda2fe1f7c9e104545fa. 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/NLF711606247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a9151d2aacfc82bc46b1529982eab8533444d566fff5bb7db9442bca92a61c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKZV1500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e124774a1ca74df2d5cf968c847aa9f90642dd38383b4240c9d12e0d783439f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLF711403529.