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 0x4e8f1d16049e99ab79f7bd0beeda5c932d5c36dc8d60ea8676cfeb461c510e98. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2eb3d559-a27e-4290-bcfc-06252edf1858.json and https://artists.proofprofile.net/proofs/artist/2eb3d559-a27e-4290-bcfc-06252edf1858.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 0x0d9ede60d77753bb11426357750007a4fa287a0ab4b5836752ba5b9c2674e8e7. 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/FI3FC2550704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe537e2c272e2cebf8f8fa89066abe7ae4803dae38accbcf25a5388ca1765f44c. 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/FI3FC2550703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acdbe6e68240003d2ae698453dc5ff6bed5682a042505c910ad34d4aac11268. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/FI3FC2550705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c274fc8b46adf2d2018a9036e40cb980d3bcb88777d9f79b4f41ce5dd965fc. 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/FI3FC2550701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eb985061b4ae73fbf23a9254a74283a5c0641a8fc59d5377405399111b921d. 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/FI3FC2550702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe537e2c272e2cebf8f8fa89066abe7ae4803dae38accbcf25a5388ca1765f44c. 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/FI3FC2550703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9ede60d77753bb11426357750007a4fa287a0ab4b5836752ba5b9c2674e8e7. 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/FI3FC2550704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acdbe6e68240003d2ae698453dc5ff6bed5682a042505c910ad34d4aac11268. 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/FI3FC2550705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3682dc58d330000b498ae7dddcc26de96164bdc38afac8ecfc5d13ceacfcd33. 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/FI3FC2550706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c888efffb16e2e820ef8b12a959d302d55fba3c85efb42237d22e3cc1f428bd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FI3FC2550707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e6c80204d26d63243386a3b975229668aed3b786910578ea7a1b17ac0a0f88. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/FI3FC2550708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ab6453399c5633924e001337a5d25f652c508643ceb53debb28abead809edd. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/FI3FC2550709.