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 0xb61bd3155aff919424e792439c9c37769479d397f35af8f683dfef8c685c546b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbf6fada-6b7f-4016-b6ae-f7cc7a069aa6.json and https://artists.proofprofile.net/proofs/artist/bbf6fada-6b7f-4016-b6ae-f7cc7a069aa6.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 0x85e24e156d8ee7599f917e966b1a59277407a72a42dcd97a1de8a1004f42b62e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:05:51Z), 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/GB8X81213211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcd4c20e67129f2843e4806162752e7e41bb38698d31c8687eaed79484fd435. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GB8X81402177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9508dd14b0278e546038a4486dac84333e6b198782e5cae8fe8fa696aef6fba2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GB8X81570584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3833362e7a29fdac3df88b679c42eba2f8759d677e34f7a24eb07f934c414a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GB8X81570585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef36abe8fa0670a07d514ea4a0a15daf9df92b8cdb942f3ff9e15269d42c18c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GB8X81572954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247c83864ff30f341036240546b0cbec439621d407aa2ceb985dcbb0fbf900e4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GB8X81780832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73b381908a6f2289db783ee5ba02e17daa6ec2cb173284401e78f295d8af91a. 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/USANG2424205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda66987531622632273b941898d34aa3666b3bf4583d1d1ff7ea35c370dfb130. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:51:31Z), 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/GB8X81801236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabef736dd223281a1ddfd9dce0876b65d4f78414b5b89ca239b13fbf045a65e4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:41:49Z), 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/GB8X82010139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddafef0cd3258df6926184ed0be2e8f78cc511bb56394e758d118a567486e63. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:10:58Z), 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/GB8X89910418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163533747a2177e57798b37aa5acb9ee60549f7e2127c2b2333c94f45adae0e9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:09:22Z), 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/GB8X82110223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a420e1150c7fbc5d6a765c9633b7e5900b0c42b0a316ed2be1e6660e6b4b0e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GB8X82110227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57fe48b51d3b3e722959467b116703aef3eb4744b77ac086196c564391e0b4f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GB8X82110226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0654adcfc26a7d7a4637ffe6836f932bdcd2af942b77dd327e5b6a53e626ef. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GB8X82110123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1075ae6ad73294164e68bdf826d95cea46e946ed60fd9b194f1dc8439a34eaa3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GB8X82110727.