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 0x821be0a4d300e9b83f376040312ebc69250a352a7ff15820015f7ec2da05dab9. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d52b5ae6-b3a7-4a8d-93e1-7cf478a9f068.json and https://artists.proofprofile.net/proofs/artist/d52b5ae6-b3a7-4a8d-93e1-7cf478a9f068.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 0x61a507d11a4d831a279a3c726e9f425d53a590698e067bc4897b2d1b64162ea3. 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/TWK871100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e03b8aafeb5c9e569bc906536e526bf6caa467ad7ce929ba65da12355d8e59b. 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/TWK871100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86af4ed1f6df5148d58b381f9ff34b32550d1f67721f3e640e67ce8cf0d40dc2. 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/TWK870900602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeefd4eda2a53a6590fcbf3a5fbbb5e4e5470c2ca50a713a950bc4e12cbf44d9. 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/TWK870900603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db11b5414eb41bff11d842fbe2bd89aadf669b5ee638aacd26e5b746fc2dcbb. 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/TWK870900604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf91a2cb66df3aa3ebedf2ef52f62cc11f1cf478790fef9538bfa03e18a28bda. 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/TWK870900606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26e574a8758e3b323a1ec59e897e33d778767501db85dfa401210dbaf6893f3. 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/TWK870700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569f88da06f0a7235018c8391e601c462a3391dbff7c62745231988cc60eb7d0. 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/TWE531920303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8845223b9ac54c66afd145794699bdb8cdb94b653579b8f6b14188db2e02e24c. 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/TWK871000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78962555bc9c1fc191e7f9a913f19534580dcd7d0459022d88d0844ff6764383. 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/TWK871000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd230962138148ee881c619bbebeb091541be5487d3ab2bd2b41b757d94d59eba. 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/TWK871200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768bdf38e87286f4bd53916f52c897d9a042e9b4a5b377506185e94bfee10d69. 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/TWK871200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cf5294cd23a110fe5b07aae0db1aff525360edeb4dc89ddcc3a78b552177da. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWK870900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247b53e606c04ef6457a55bf46791287d00e4b5c8115ebc1d099a644d296f38c. 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/TWK870900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde98417e3ce368858d73601aae5c18ef61f04af3e94b92a45a5bc1c77ed289e9. 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/TWK870900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31f88505c8c39abd699d17bf9d7523d589494dee6c9dfba5689385dcc288beb. 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/TWK870900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf94897bdff61d4c40bb5d05a412ab402babcb1de0d3a90c543222b383e8aa9. 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/TWK870900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327dc771d09a47c7709e4bdba92e705ee634d1c4c10c606332cf35aab065adec. 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/TWK870900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6432d41bc2a443322f8f6e86f5e2d5a500d752df6e5ce5c787fdc0fb36dd864b. 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/TWK871100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21749da2b829d121e7934fb820b6c93f28a8f3ed276e73a5a522f573429765c5. 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/TWK871100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42e3cf2379cc8f4d90cea3db49fe99bacc5b11780ad7b47480333679ef5272d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWK871000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c5671d0a7b76f16031f16cb4f633f965d2256ad7caf29597d961813ac2ed5f. 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/TWK871100502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb571d75c52d47604246db9ca1d2530a61a9c7d3d1ee0383b7ff25d139d351d6. 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/TWK871100101.