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 0x708532c214661df5bf590d7244ec61324c2c6425038d9a5fa75d47ba82bdce76. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de1f43bd-bbaf-450c-8ace-ef04c0cd6be8.json and https://artists.proofprofile.net/proofs/artist/de1f43bd-bbaf-450c-8ace-ef04c0cd6be8.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 0x1f0f814bf054001315b0fadb4e270d9da6b4b48848a7f0378089580af04b5430. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CACWV2351512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6b37d33b2d892f96e53a11114da925b86af0a9c09b4efc28ce24ba7aad79cc. 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/CAHQJ2403518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f992a505ed5a0f2affd01cb86ffe153411ce595195aebe9b993c5055a75aa6. 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/CAHQJ2406260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f992a505ed5a0f2affd01cb86ffe153411ce595195aebe9b993c5055a75aa6. 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/CAHQJ2406260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b78eb94a6c7a40e15801546d2cbdb9cf9a68f7d827b01d425dc130d67aa9f11. 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/CAHQJ2477573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69054327da4c9d2c17627c833b00ba8d93892c574eceeb3b895a5b99ff01d547. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/CACWV2432073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3bad17a6d907fb3ada0b7aaea5516a4499a2aa7ea0cee145d75e04dd86b39c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNJV2460370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf67e6f4893fbdcfebafc5cf426b8fe560611fbb3a6d536e8bc311d4930ed2d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU2456650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4f102510eec66463b7225f5d1b7b83964193de7598166afd165045a8ede4e2. 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/GBKQU2463838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5066c2ea151b362b6a6cd82029257f29ac5dbaf1890c5fd5920d1ed50c93767d. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/ES71G2418152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55060cb9686b782f7f9fdb56b56f866b6459ceb1b085d62d936cabff106cbc55. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2421064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303af0464d95747f714e026d262108087006bbd6933bb90c45d5bb68ef3e305e. 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/ES71G2427308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806befe103d6b4c5a15ac236a707d9b9e84c27bae1a2385a99810f643b232fd9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES71G2500702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a716e0a1099428c2f0a6af0cbbc0d77a2e8ee452deaeac6a067ecbcafb87a8e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES71G2507354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec736996428f224eb5f4243153d8148e5e7a1cc8890e75db7cad039c87aa58c0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:24:46Z), 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/QM6N22572759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec736996428f224eb5f4243153d8148e5e7a1cc8890e75db7cad039c87aa58c0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6N22572759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee5f26868fd0ec683b93d3586b38aeabc443263c69676be00ac65c422a6e169. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6N22581501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f74bd179858213584defa08f5f9da8e1a0e5f6062e792aacb5a2fa76c7b801e. 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/QZ5AB2471170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f09a28623c95059c0f09529cc635a9643d94c69f79b888035d2242480c92dd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM7282502625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60109cdd9c3861e6fb9fe94f70279132e129feba358838322358180c47213acc. 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/QMBZ92530739.