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 0xf2af6e167eb30fb4deeab61f14e6cb55f56b5fccb6b97b3e3b8011a0eb781b7e. 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/028e568a-d4ba-4131-8306-a367f451feb5.json and https://artists.proofprofile.net/proofs/artist/028e568a-d4ba-4131-8306-a367f451feb5.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 0xde18d2249fcb817252ca7ba2d0542514ffb45c1c5290145ec371a262d56fd575. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUR10301295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb322fedcf5ddfb21131ef903c46fe8a191404637004b61ada7b565793d830b7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USUR10301297.
Every Woman I Know (Crazy 'Bout An Auto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e4957759702b553037f86d8f7c08c4c870ad8aaacec4a7ec5821f51b9661d9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:44Z), 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/USUR10301298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02f070d4a5a26400df758a63e3e0dde7f5099fd68baa23e5ec063db6161cd4c. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USUR10300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c03f11215a5bfd36f146b0464125bcf8a8e496ee26719ba6d8625245134f47. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USUM72215937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8112d732f7d68794ec2c85a347f4c5f5c04fa1a08dbeddd82124ae53addb10c1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USUM72215941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8519d8f2f325f232c18b4f8a0d9ada2970feb5998cde45256413e4c0e1ba06d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:28:01Z), 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/USUM72214285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c012c847221d3f41bfa4ebaa09cf8bd945bb3d5fa755f730cf741106ed69155. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USUR10301304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532ae072530091405b3b32d3d0017bda08758da31e289c03b8433265ba53ac57. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:20:47Z), 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/USUR10300064.
20th Century Masters: The Millennium Collection: Best Of Sam The Sham & The Pharaohs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b8a3e79090f9c7075b4f4ec776698e8ec95983f96fe5d44d6ac8898ede109c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:47:17Z), 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/USUM72214288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b41e83f971a12cb1bf337f9e9ade810336c097b92590b1c65556e3a6bf339ef. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USUM72214290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f921fc5210c49c9e51840b7b92407938e63f57af836cf4718c9ee9b4ba38518. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:44:30Z), 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/USUM72214292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b5e7376965f14e71ec0ba7b32330088a06a4789e7c087c4d2e6207eaba5b9a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USUM72214396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22f9dc75c0ea4042474713e89a48c01ebc7f1b0899f520c2b44132971ad1032. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USUM72214404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ab7e25b6ff9b03d738e261d4b155bdbe28314ae54bd21fff7334a409c5097e. 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/USF096525160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b884d9a374cb667f930fe5739f872d3e6178837e93b67877eaa4f2e175a86. 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/USF096525040.
Out Of Sight: More Sounds From The In Crowd
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b884d9a374cb667f930fe5739f872d3e6178837e93b67877eaa4f2e175a86. 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/USF096525040.