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 0x170b92c4852fea6282b03bf62468696e3a1c51ece048a6ac9eac3832bfd98910. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/227f61f6-a59a-4003-9e6f-f21243f32e30.json and https://artists.proofprofile.net/proofs/artist/227f61f6-a59a-4003-9e6f-f21243f32e30.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 0x4b8cd6411cf23cc9c78027e491851bc5c0f33690bfecad431b99cecef72c871c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKG732223510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c800b5a7c4694506bed60bb079768d02a9c1f1790cf4d762afbaa26bda9a7a5. 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/HKG732223512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf90fb0292d8d164b09d16cfa0f43542aa76f6eef021d322b71da6d09a0ba18b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKG732223513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc7d12e2c77c3cab0ed5a20840c682bf5628756dcfa17d23c2a80303ca1466a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKG732223514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e35398ef117310733ae3ec544b758414a531d0c0c03ef57afa2233bb2c9aa82. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:35:41Z), 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/HKG732223511.
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 0x08335316e0ae4ae34a2498654aad83f2d4a1499190e38d7fbeaadc11a029234f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HKG732223508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1822540d38a891ae49d4691c904fc5db400662482ae10fbc9d07e1cfbe90bed5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKG732223509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bb4c337980c03f3a0c590415ab497ee5d78de528494d7390d8ed45b9c6c92f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKG732223515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03e2cb587e61ae3c19edf5fdf9216d081e48b639caa18e1ea33e1d284d201e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKG732223516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502e805ceee853b875d30e85d4fa8d1f64a6c4b1d83c7df5147b49feb5ab1d11. 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/HKG732274738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa205363d051c741942af56e4a7b7ce471617841fcdcd0b7265780b2fac166f84. 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/HKG732274741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d887ec13f256c61a054da47f36f3e1dfd60a350f96bb4aa7051ba346572fe99. 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/HKG732274737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d0559bbf080f86a6e442e5dd4bdfa4cda18ebdff9457a85ddc9700c349a108. 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/HKG732274746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c33e118c59b9d94c9561788231bc247efa09dd2df73749a238698150c47008d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKG732274739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85841b8b3396b9e7c6dd8c346c57ad27c3cca0da8fd93306e1cbfcb7562c32fd. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/HKG732274740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657e5aa9b71b951aad1dfa9065709294def85dfd15611879f2e834d0a4d2df30. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/HKG732274742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee2bf6c74c8062dbe1a2092b2d4426c01f472f04045036bcd7f760fbdd7d377. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/HKG732274743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87991a40415c3847d9379c06e28b8d91bdbd2e67cb39972a62896e46f91fce9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/HKG732274744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d260f8e3845747334a306965cc5ff6afac5eae7fddeca329437dff0b4643bf. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/HKG732274745.