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 0x59306b8c46198e83b7aca3b7b81523d496a44fc5648cc0d270c1a4bc8d720803. 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/b2a6bbe2-2235-4b1d-a3ba-e3564aeb8c64.json and https://artists.proofprofile.net/proofs/artist/b2a6bbe2-2235-4b1d-a3ba-e3564aeb8c64.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 0xe7f673be0727951054c2b44e7d9f70af603abd590867f467051c6bec71e4201b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DK4YA2281701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad16c58ef35c8e2a8bea9b37b6bf74869dad3d5b4dbd2d371532a6597fdc4d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DK4YA2281702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379facd199b05613d690933e8b67914f889c747248abfea9caddbc7fc70f1f3e. 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/DK4YA2281703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191afede923a91f2f6efa9d7dc6b2427f7759da484dee4c7fa641cddb886a213. 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/DK4YA2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2ccfdb4e54dc31b159e4f7e6ec4d42607857dd9cfc40246ef345929803c607. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DK4YA2500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4adb06d9cbd5f9bdaf8e8dc443af4a356134145dc51e55d99803b753c253d97. 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/DK4YA2500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f82ba63d0636c896bfbb7a472fb430ffee05587a5e23044997eeb2fad4da4eb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:29:11Z), 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/DK4YA2500514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d0dc000d3c1182ef91c77eb19e333249ba89a8929a03ea2c34dfcfc70726d5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DK4YA2400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7a5e79abc475510c7b834de9a88c5beab4a55a25023e054fd40788d7a6cfc2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DK4YA2400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b411f6f82b2c655c8a74287000a5064c162de990a48aabb2e4ba5da9662df62. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:06:08Z), 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/DK4YA2500515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b0b5f9f61bc3e69cebc3c0cab3bdb2987bc23702ee1fa06fd9ab172eed5dc4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DK4YA2500516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23db8ad384ec5d6c3c5c401043379e49a9720c29aed0dd170fa5bba8840d6e02. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DK4YA2500517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d34bd1f0b0a9cd90b915e3fecffdc865b85758276327fa80c05cbbfe166f53a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DK4YA2500518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8fd80b5ca8b8812daeed5a89662c9828d40cc117e7dd34a434917fb7df38a2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DK4YA2500519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa503e1d512947625af2cce17303ca0ecfdfa5d6eeb86e7b2654ae59527132d36. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/DK4YA2500520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83466fa107f066c129f5988f56f849a2cd63d749a510fe8cdb6289ec488ab77e. 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/DKUM72200252.