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 0x53f253f762161e6a932b412ec91ea0de0183a5f8517527b3a612c4d71b38f081. 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/fd174dfc-b7a7-4329-aaab-64e53277a9d2.json and https://artists.proofprofile.net/proofs/artist/fd174dfc-b7a7-4329-aaab-64e53277a9d2.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 0x24822354e1fb1eef2566e5c3fd3590c35f6cd10ed8eba6085ecca6f59a6901da. 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/FR26V2079445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08286011e06a7f90ffd8b4650ba21676663022e9c036aaaeb6a5c873ae77f477. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:08:17Z), 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/FRX762249205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4774220d4e1b5eab73137ed3ee13d82b47a181eaa8051651e559ab61235b8ab4. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/FR10S2359063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6f1611701610dd8c2295f8385a2f2580ec9436814a30d96b5b5b2e62bdf4a2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T16:05:43Z), 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/QZNJX2477047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b59c2c8f0fc928bdcec4bec2e15ce23624ab3bdc92209010b263f28ae9d0c2. 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/TR0582400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4575c858da63a38f14c0ae79091ebbba06b93b6bc1fefb557125a6b08a28577. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZW9L2404233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0643db9ab0cf46235dc244d57aacd322cd4423280ee80088bceefc3fe4373a1c. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/DGA0S2438534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa221e65c0f588bb8de17aae1e9b170d386495f00f265e303cc08520c37c6eb78. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZTAU2534687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3721f5c18b49f00454258e2f40d042da8d9fa57dba6ab10638adc1670adc375. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAU2534681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab5b40b0d151af837b7715b707e11efc6abd0f50d45f559eda4e09e58aaba5. 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/QZTAU2534501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a5bd207a4a926be8c7edbbe6a01144a2a55ed9acc49d6f13a8db17e9cc56b4. 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/QZTAU2522653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42939e784736a1c1d7e4f44972ecb82465c3c92dd85cdcd33abe60372e16e290. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTAU2521078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763bd7906c984ec0192a569d80becef40653afcc011dbddcec1379012f3bcd12. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAU2521080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22581663be40800514e4f237d9f7411cbd2c96f60084e86a29679477c09984d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJY2510693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d6d5f1c2ad0056e2ea50076a95f79a295e940a3365df26b4d6aa11df4f84c6. 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/QT3F82589229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e44a4b2955185341fecbad9150ccdeb5a32167fc60d23836110a366e93db5c. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:00:15Z), 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/QT3F82586422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c1402ea6db9e88c6700d698061470737935b70204ee3ceea0860e5434367a3. 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/QT3F82586348.