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 0x055938a3ba352176b9a50c5e86e13ae04d4f50b127528a7e2d8f94dfa0acb2fa. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b38af14-0d8c-46ad-8bd9-d84105566cc0.json and https://artists.proofprofile.net/proofs/artist/5b38af14-0d8c-46ad-8bd9-d84105566cc0.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 0x52e4a19481a86e85b908060a86c54aac9bc507d77bd51ac6f892d082cb94477f. 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/ARJ6R1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dae1af85fd083ca8520bbc706fbeb59d15c66a4b97c5a1a131408f1583e2e8. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/ARJ6R1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a7f2d77feacdfda2d417204fcb5ad2ad1bebfb4973c7d8522f79626ef8339e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ARJ6R1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e346fc1cd1a20f870f10af113c7a1307ceb730f3e78f38f9f89f085cac3064. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ARZ022400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f90b43beb79be43bfca0680e65c4f1faa44ab6bca576292151251bf989c5378. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:40Z), 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/ARZ022400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a51f31aa129b9102bcdf6e393c5e65a2c9ef4f2708ec8923e7d00f7ca6f0642. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/ARZ022400446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc79789d6bdd341d152048a4d0c26e793a3230ea64ff1a6a1bb7dd0e2c0650c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ARZ022500234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae00d46e5b473360cef75adaaae2283354732ae4bc0c68e6e90b5bc8536da62c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:41:33Z), 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/ARZ022500235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5c6922b888ea03877f8b66af6ad371d0e86908538cd76e877f8f94459e38ef. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ARZ022500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1a65b6ad11db6f5b2f1f3bd0f322dec66a9a9973ffa2110ef94390a75f625f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARZ022500237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb4904cbb8142d2518e8de64ab156abd3929c36af7a2460a29ec85e203703b7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ARZ022500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333c2f6a749edd31fe2d3eb16842b5734cf8f79f9fee89d4cd3bd93967472184. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARZ022500239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc13eddfc5596a87176e58e4cac12c63dc97e58e16cb934309038297e3a8aa9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:02:25Z), 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/ARZ022500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7313133f4650307e4e4af2d3aa8df025b8e9a37ac6e56fe9c2494eaf384f8991. 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/ARZ022500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b21aefcdd9fb0826c9466066109a2f1b59fa332c27715a4be2eaea5833996b. 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/ARZ022500242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c959002516bc433ca581a7c43e254807d4517d0d1d2e191aa0a1fa93ff0817. 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/ARZ022500243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9caac7c6dc26c674eea77fdd1201da9ac6d433b91d859db9084a580f9228c6. 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/ARZ022500244.