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 0x9d05e9e38cbf70b39d1fe4b99f8947ec28e051bbb40d6ae10981dadd7cc96307. 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/9a86a15e-1493-4b2d-83d5-411e9b47eeff.json and https://artists.proofprofile.net/proofs/artist/9a86a15e-1493-4b2d-83d5-411e9b47eeff.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 0xeca6e5d73d879e698ac5b2d620696c1e27df57421481c9895573c7cf87d9232f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:22:49Z), 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/TR0950800964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2888af3ac40969ae999b6c462ef75664f868c8cea20fb7c3c25979c0c96330f3. 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/TR0950800965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675a12e250ad33dbb562231ab5ac09cbcffbfcec0ba4bfeddde0e8a5b70213f2. 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/TR0950800975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a555b6c2b259b624884bc36b5eec5aeda0fefb86efe7b2499ce95be615b0f42. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TR2811700298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133da410688167a0f320ba42b147fcd679558784b9863423692f19629dbd8f23. 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/TR2811700297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a555b6c2b259b624884bc36b5eec5aeda0fefb86efe7b2499ce95be615b0f42. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TR2811700298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6588083a41515fee3239f3650787f6e0f2d15d2b41821bd7cca3492476e3e7f5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TR0332313186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2932d134a9072568202b94f84cc14140110c031172d33dc13843f48e8b51b252. 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/TR0332313183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab48610349ee3413dd543aafe8de7ad61176d285cde7c6ce9f5090e3c0f5f1a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:45:00Z), 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/DGA0L2443446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8dee1e9e7242b1fbac746fda87e08d4bc9bfb92a69cc84645f6c6ccafea86e. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/DGA0L2443449.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa826283ffb7093df47092697b3bf24a1848b2f27215bc6a30bbcc3911a192375. 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/TR2811600237.