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 0x9e4ed6464fba2720d8801c72d4f2d5a46b700e98f9c6d152a8f46cf1e2f199a0. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95e97135-d87b-4d16-99b6-ac0a90c16e9c.json and https://artists.proofprofile.net/proofs/artist/95e97135-d87b-4d16-99b6-ac0a90c16e9c.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 0x05761b255f990b9a9b09f2f32bd693c686dba2c6b681a8189f7fc71b9a995ff2. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBBYB1702989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf2cd237aae3306650edf265fd5c9d0af3f7f87e5408ad4e5df465d3ccdecc8. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEBL61449306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159117f4aa8fc5e86b6d70fc475d83ab93ab4aa8185548b6009a5eba2866013e. 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/DEBL61449307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f57d5325d05c30c228d5005db06dc249a12bf4ea181e2838ccc81d726d0a64. 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/DEBL61449308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376a42f32d27a4971c0d361a29eba8643a835025b85d1a69d1cc9ea1fcbb2606. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEBL61449309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe802e1feb598bc4377848a7005d4cdcc7286d94f04709280e1e7c0301b18370c. 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/DEBL61449310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7078deafcc9ebabad3010e486b89b3748fe7f6e460d7cca9de59ffbecb93941. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEBL61449311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac82abf25eddac25fe0b6f8e11573da3a3a72d32f5006423ef088ee9d328f3e7. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEBL61449312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e5220dfc6355c01788f589ab507d923ef5368605ac0181ad4b870ff748b904. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEBL61449313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3895fbb445c05b062cbbd5adfd595b6e586156c1a14cc8f2f81e18a8478f87dd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEBL61449314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa9f18422a1f63565bd545a33167aec4b6fa6f490cde752386f0b985914c0c2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR96X1848820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98b50af350f1b89bcd5a163b200df2110aa1e766ef2afe426c6c527489a7522. 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/DEBL61097186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6d682d7c8bac0913d0b65b78e97f19fbba0678c35933f1cbb704bcb188c38b. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/UKACT1890663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3605d0b05db400522dc38bf08b2dc04d025d6593158f7bb04045038dfc592ab8. 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/UKACT1890667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a76094af3e23b63257bb0162684ecbd249649e3135801d731b15d33f6b573e9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKACT1890668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a988d8882b9d60ef8dd276168424852414e4c46c1c57c639d2cc674d42147af. 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/UKACT1890669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737c543f627e43574498c454036fb000caacf51f803d11a16c05d663dacaae0b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/UKACT1890671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252cda588e4b8439ea7e56c6a87afb7cbeca0d9bb47eb960e8495b102113ede9. 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/UKACT1890670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb72e7eb48b9615f2dc2c4ea0a29e32236da2be52b657c7990beee5b3bf6d859. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITS070830020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b8e7b3489b8d917adf1822e83d3835da9e1f338369750573523938e8c89fec. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USA2P1863016.
Sun Department Records - 5 Years Anniversary