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 0xc2c572a4e444a06df80fb2404466430d37091df184c09933532e329a6fafd9ab. 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/d1be5d00-81a3-4715-b3a3-3f6e858a8dbf.json and https://artists.proofprofile.net/proofs/artist/d1be5d00-81a3-4715-b3a3-3f6e858a8dbf.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 0x68df09d06bddce1c7bddf2c4a46a1f7a178bafef827c2060f831f3dc84fbf153. 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/TCABE1221284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb49547eab54a43c16d7068f08edc75d6cf5029698ef162ede185af35713f8f. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCABE1221285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b931f24bcb86f3aa007cd5a29e6f3b26851873c3ac5859ed0655bdff4042dc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCABE1221288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb748bf9fa55ec9cb5b6ca9b6e53634f3dfb9c23e0eea4b2d831c8752c756cebe. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCABE1221291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e7bfb0a51081e4c0b6cea8db61d0c9fb67906b7737c1ae5cc598d2f946edeb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCABE1221292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df30446ace37c4f1c1cff6aac4cdbf6a30f7c2a6006d702460654f80fd874a1. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCABE1221293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1563f34370e78651d15dadfaaef63f60544f3103017de3612c6e062c41433d81. 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/TCABE1221294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7562ab28424ed01935de06e3b53ca9308aad44eed5136e86ce1209411264192d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCADN1809178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0159e99a43f0947837b0b7abcedc3328cfa2d962000f701197677f4b946cee. 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/TCAAW1110667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0023fd85c8130f3eb3b96e084359536eabadd39b80443f04e9f5f0c66e28a80. 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/TCADN1812259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c92d108b8a807ac853aa02166b1fb455bfde2949c80d405dad7629c49c5858. 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/TCAAW1110673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6da07da121bb00b2cf5dd196a052f74ece62e53f4c1ba2368e1149a820d1cec. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCADN1812015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee6d4630b10f6f473685d3b90a937b97c0a7c914e25358f291d0ed66835f9fe. 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/TCAAX1161429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325e187571e439cb81910494b3699840b9cceca43943ab9d87dcbe0ff351d82f. 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/TCAAX1161431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9de979790004a2811d68ab7d7db65f3b2d9605822db466866e9a0c386b283b6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAAX1161432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcfbc9a660202daa90ca0f066bb3dc41611ca8c48817f0474147d80b4d3f85b. 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/TCAAX1161434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376955af67aa160f9e4fab93827c0627b87f875539e09955259c9b2f45502acf. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCADN1811966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa7eb046c62230667df9c72d8ae0748625f183071e4fb6e2598fd6c6a27a768. 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/TCADN1811971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5133fee3be4abd4f8f6bf26fbb55390c11f074e8dada02122cfc22a961cf24a3. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCADN1811978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256444839c1699ae4da03ff101de6f1ea1f152380cce63e3196958ffbc1744a8. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCADN1811980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1518da8c459f5d0ac0c623bd0708441666ca4888d37a19de1f5f106f641f6d95. 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/TCADN1831375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed34d99d29767fe3a24c7205de5d78a93668eb9eb9f3caee7e04676047bf0caf. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCADN1831378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ca2c3a1371ec131025183c0e9dcb771c1e0447897af44e323249c60247a4c4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCADN1831382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fb7227e50b49559209a6f358e9680b462d50b21e093181681a55fb21e175f7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCADN1831387.