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 0x592562b5c611708977d37f7b4bb2b26cbd228c4373d78f5e440e18e55927d9bb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5716ea43-3877-4765-94a8-6ffcfa052e0e.json and https://artists.proofprofile.net/proofs/artist/5716ea43-3877-4765-94a8-6ffcfa052e0e.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 0xdb92d2d22c4ede211c4fbc9f2200225cbdda8becdf96cb583708d99d8151daef. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA61923616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f55feb84f8f1cc7f0626fc0f10228dd9a8fe585f2380c5e25fe5eed2ca33c7. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:21:36Z), 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/QZDA61923617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd533b493074e16f2b6b94b527dd67a1dccb7d62351a8d653258d596c50a2d57. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:09Z), 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/QZDA61923624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93f4256beeae642e8c4ce12c675479883866b5a29f7e49072d4863cd65d8425. 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/QZDA61924343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740d339f424abf635810f655e044dedbdc01d480cdcb8281eb17af8bc28ff93b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA61924344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab4484d6b28518aaec51c716bf40a4fc6458d7a37458320ac54241b0d96aad1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:39Z), 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/QZDA61924346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67379963ad90c8ce0dec0e4cf2f6eeeab745aa7099037872e7006d54d55b6e44. 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/QZDA61924349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15db1cf1882448e6be0e78e85856b006ff704a8de1e18ca13fdb4aa6d12d1c5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZDA61924350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22e0d08d67134b634473914d59ed6948d1336fb1c30e5b32b76f5c37771fbb5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6N1911418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522cf25bd0588a77fdac2b5f0173fb03e61a13b5c200496ec5c09462292d4037. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6N1911424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13046ea846389b2c329f4c5e01b01fb9bfdd83a2fdd7a536406dcc4e7a9602e7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ42056426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637d60ef69119e16b18b3c6537c7cfe8e4eb1407c2ed99992dd9d37e3574756f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ52022558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf999c623dc72a8a932dfcdbf3010b1d67f0638443ae1aa0962fed4a43ecf5ee2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:21Z), 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/QZMER2370694.
Entre Los Compositores Comisarios Del Norte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5723043484a534fde96134d7237f2c38cde23315bf227f09978acf8a52cb14. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:59:43Z), 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/QZNWX2412707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a16f926c22c523427c9652a5774a5d62e5e77d400442b0879b527662c3954c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:54:03Z), 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/QZWFE2409980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205e625fd92a568a88181710b356bf2858e61d7f933180a602d9335e36a85042. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB42510922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20963011bcbbf28b7ff797229d74fbc9d4142461a1ca3248a69943efcdfc82e1. 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/QZTB42510923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138d60d3c9fdbc623885754104ff7bdfac9103406a9bf1539f12fc14ba31788e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFG2578947.