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 0x0cb072b3c6f93195bc91517d2fc8e177d903f118991051b7ab152511c486aabc. 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/298def54-9335-4422-8840-fac1605123dd.json and https://artists.proofprofile.net/proofs/artist/298def54-9335-4422-8840-fac1605123dd.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 0x28ddc727b2453be50832e1af0473f2786b358a87d2dcb4f4760c165e7ea03dd6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA2P1530804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0384e5f0e14a009ef4df054ba7809cbd01748799d499bda1e46516440f3dfab8. 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/USA2P1530807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4675a2418be950a2c822d147be48f1b87a172d7ab170b29be8d695b7d1aef0c. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:02:51Z), 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/USA2P1530808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94253543ec892da0533c4a4e655c2ad337bcad8614412f1573c5f21845f2026. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:28:34Z), 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/USA2P1643536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe966f349cc7791d0affac7bff2c4780fde7ee7608d1d7cee14e2464d2e90d260. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USA2P1643537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21ec9c1ad98464cf2e32fdcf7cbd3f578bf7b54273e47289aeebc92ee0b8718. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:54Z), 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/TCJPB2404208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb00827e4f58a8478f0fb54427d874e328822d76438fab3bf5ddc141c0d4eca. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPB641800152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b69b2e54037105f61549b28755e6cebaf84e243d4c32bc960bd62ce06192156. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:48Z), 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/JPB641800153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2735573d7f6b5de646625d7b935b01790396348c0f9aa84ab7eed64832fb8693. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:30:59Z), 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/JPB641800155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7149919a2728d92747e2dad00a91a92a496aa8765d5d66c361c65365a9c7717. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USA2Z1811353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa62085cdbf21b0f80e7b48f918a54f16e9e869be424fa45b8aa5f522c12923. 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/USA2Z1811356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1077b46deac91d5f2d098b4b252b5e488f1d664e8a754b603f6297474f7b17. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA2Z1811358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf539c03654a0c52d77673c6dab41e9da2b66930f3811746410467f56ca166c77. 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/TCJPB2404243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67031da7f624b00a3e2d0a3650e418b6b900bda9b41e7b8f9359cfc271f94e5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCJPB2404237.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4e869954bd84604a1aaf8abb0f6a3b3c4b8192b1fefcaf667e0576403e0f00. 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/TCJPK2502177.