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 0xeadf1e586df361b0e0dc32102228b18cf881719dafe39d2379817037dfa2aa37. 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/7fb8c624-02b3-46f1-b08a-de8578dcbae6.json and https://artists.proofprofile.net/proofs/artist/7fb8c624-02b3-46f1-b08a-de8578dcbae6.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 0x5942573ca7069551cc7e11187e1bab9e7ca5e4ea4af8c8f9ee8576d6b215b968. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARF411000514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa064277042a5b9d9830868b6bbb649ec02ac6dbf42084297e7d80ec1f56c13c9. 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/ARF410802117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae25f42fff3611ea9b767101ee16afd3e7e0d0edeb5a040b05e9f21b06eae90c. 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/QMBZ91350445.
Vintage Café Vol. 3 - Lounge & Jazz Blends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5942573ca7069551cc7e11187e1bab9e7ca5e4ea4af8c8f9ee8576d6b215b968. 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/ARF411000514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2f7e2e29a979bafde8e35b0763882a810657fd353bc945056822eb545636ca. 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/ARF411001057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a2bbcdd83d3344bce1dcea1f48110b49b694cca8f75df57c1699b12e00eb22. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ARF412000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5942573ca7069551cc7e11187e1bab9e7ca5e4ea4af8c8f9ee8576d6b215b968. 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/ARF411000514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa064277042a5b9d9830868b6bbb649ec02ac6dbf42084297e7d80ec1f56c13c9. 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/ARF410802117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb815846e3be2a2415be4db1cc36ea597a2bf17262320e46d41e027fc525d3d3a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ARF412300455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb815846e3be2a2415be4db1cc36ea597a2bf17262320e46d41e027fc525d3d3a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ARF412300455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0c72126381ebdee6dc90089d5049bc27276fe3d52fb875354f2a362688c57e. 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/ARF411900300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae25f42fff3611ea9b767101ee16afd3e7e0d0edeb5a040b05e9f21b06eae90c. 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/QMBZ91350445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2f7e2e29a979bafde8e35b0763882a810657fd353bc945056822eb545636ca. 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/ARF411001057.
Butterflies in Your Ears - Diamond Screen Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8767c1e1af55fb0e9dc23a9f04f94d6fab27fd149a568fed26d39a7fea36a8. 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/ARF410400072.
Vintage Café - Lounge & Jazz Blends (Special Selection), Vol. 16
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0c72126381ebdee6dc90089d5049bc27276fe3d52fb875354f2a362688c57e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ARF411900300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ea0ac5bd67fd0184ff6ce0bc90c1300bc6f3da8d7de47e979a5b0e85e642ec. 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/ARF412100014.