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 0xc002772cc3bb4cc305767dc52ca66bcb2ad08254b49f2844dae69c43cbeb6522. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6adb4a27-d427-47fc-b182-fe26dc8c89fa.json and https://artists.proofprofile.net/proofs/artist/6adb4a27-d427-47fc-b182-fe26dc8c89fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Peace On Earth: The Best Of Tingstad And Rumbel
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 0x2617c97346f912705c98e5d26ee1d569aaee2411998f75360c3bb4394cd0360a. 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/USNA10420421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf1afbce1a243f3db342729e36a11ac0d7d27c7f7190de44cbe1522efc17227. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USNA19311570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21804bd95dac1a03d715e987d6107b9fbbb7f6cd514ffba996023275b0b91e3c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USNA19311572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb261b7018b839256fec2b6b5bc5e3f5a36b7f7d43340a869848d37d5fd29a1b2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USNA19311564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9cca57d8e957f24f59dddb26a17659f3404ff08cf87482d51cc3136ba3b87d. 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/USNA19311562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d820639f2bfc274dd4d4a50f43fd351142aebc1566139fe7203846472a3de1. 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/USNA10218932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cba23d3d38b64f98d27c59a26e0ae9c791a471552116c0696dce70e1486893d. 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/USNA10218931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b25e441a308f8697a36afaccb67c9fc6416c77f538a1816c02651267574948. 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/USNA19311565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bac1d1e0de111b4c67a2acb5512218d3d7fbc7b0afd14e8315517094f289a2. 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/USNA19311571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3a7290471eb0666f30be2a676929c8ac6da211fe086d883a59b561b2d8518a. 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/USNA10218930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6aeac5bddbc50d6526594b596c594b223737321ce9676db2354ed8c32ce009. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USNA10218925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7785213dfe55e7d1021a558ef904499d31c6b4fe5e555f82e034b1ac0ec6726d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USNA10218934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cc72541d94a0c6eb668bcc63fcf2622f6c2d9c7cca0c3d41f17e06dba5aa86. 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/USNA10218927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cac316dd7bd390def096b0743e1b776cd4a834ebb8b91e5237b12346828590. 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/USNA10218929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6c8b812f53576bf3cbb79b42b9467a0343bc793f9a12154757964c3267b390. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USNA10218923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dacc80a4bd89153d7c9b86ff7b1fae5225a6c98fe6ba6014cd1e39ce6615809. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USNA10218926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0060168ca27ffd867a38fe505c87da79dc640c376bdb683191f410dee7c8b9f6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USNA10218933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e22672ad7a1465845aa2177bf605d89d23caf04cf93578c5b2940ae37be3ef4. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/USNA10218922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05472fbc9bb41ab6a4836421e2971df2f26ef1e217468fdf03606eff1ce164d5. 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/USNA10218924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402dba7aeca5765c6ca12b153b5958ac3e7f8f7275a6e1bea9977772e19bdd8d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USNA19311566.