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 0x056d06b68b66ee214bf112a05f0c4654cee66cfe6bbae9b0a9f0d69a5c1fe0e8. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef822aa7-92ab-498b-be18-25f50dd2797f.json and https://artists.proofprofile.net/proofs/artist/ef822aa7-92ab-498b-be18-25f50dd2797f.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 0x5073222b4b1ce07de1800a8dc70c373a1c37aa191e38e6cd3a21ef8ff52a62b6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ZABKR2100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c1cfe7e808db2fd2b2537bfe7bc4f2f623cd07aae2ff371c37ecea82ed8475. 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/ZABKR2100115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b24ec6521972361b41124175f30d0abd35e4bd686103fa35bb8e18485386494. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/ZABKR2100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa47e05b375ad1c6ae9c653ad8b1d3a98b3f831e004124c44ed47c76c6952b9. 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/ZABKR2100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b715a5c512587fa8019ef6a9b82ebf9b9f2679f7c54d918764154cb8a0ea29. 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/ZABKR2100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb352436ad6fa9163588ccd3e7c3cb227ca65a80ceecc8b97c6a8a20983a8cfb2. 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/ZABKR2100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa35dc2fc088dda536f618a31e197bd66af003ca182863fffbaf4a837b5e3825. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ZABKR2100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84d8089d90367bfc030a91765fadfb88c1fd17e4595c683a350967eb2cd0550. 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/ZB88V2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda01589c8647083d0f9ce2628c5964fe3ccac4ba03f0cd406fdbf235424b71ec. 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/UKXN22272393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d7b140e05e5770704cfbcc461f14801fbd2ff45af1038692ddec859f6f3a85. 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/DEH742163490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ead784f3544e8fdadd674a7101f47883c0fdb44fba36e798cce9223fc44a7ec. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEH742163493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64422bfae4e95031640d664089f6b96da2fe7ba650ea79faba98261092e53ad. 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/GBKQU2435595.
Birds Chirping Is The Sound of Sweetness
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2b8fca7674d5868c31b2cda3c5d6f8e40a8d446d17322ed2d9135d6adae375. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBKQU2435596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb870119f87218969f1467c4596c50dadc1bc9cc08244087b7a801e9124408e40. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBKQU2435601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c45dcf7b47de6353473e4cf2c6e9b94ee37bf033a7ee898b630052840465da. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEH742418323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558724e41e4a94023e5152d74cc97f209df5a1e8b259d0de8f320b184bf44243. 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/GBKQU2251428.
Taurus Season 2 (More Than Money Less Than a Penny)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17000eaf23959c579d2e2c5a0b7c33d28d1d18e590f725cab2f77a048f6a043d. 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/ZAYZY2100004.