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 0xc6b8c22587507cbd55aec798985bdc357a0b2e6caffdffc82479baf806db3fd4. 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/a457dc08-b06f-4bec-b4db-b39168065ac4.json and https://artists.proofprofile.net/proofs/artist/a457dc08-b06f-4bec-b4db-b39168065ac4.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 0x0c7cc6a35600c6893c1b5dea3c378c5817184ee20880ec94e81870b0d1521901. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:35Z), 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/QZDA52068751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6bd634a9f78497890c90b627828b5c67da2d50c933bf4b94efb69a40830594. 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/ZZOPM2105172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5973bfc6d12c0761b98790f586c00c7b21a0bbf906a088fa4f3e264f84b9bccb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:22:15Z), 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/ZZOPM2110258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e76e4625a63e895b88f636c30dd40efbd54c521246d78909e31b5b69c28646. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BK4DA2203063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a99acfa484925077e0f57372e078f2eb83ed43387c73e7cd534c5793412a799. 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/BK4DA2212544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0febb5ee37899bb88afa828015fc5d0af58863737a74d169bd12271dfc9eb3. 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/BK4DA2310236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc95437ec3a59484d4e36b5c7a338a09a3e793e6bcab9de76871abeeb33d5701. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:07:26Z), 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/BK4DA2312889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08416b507a4d231ff67d938f8c06c6a9673661677cdfa084fe7d3c32d78c89bb. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/BK4DA2314813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c18a98d103b06ed49a6dd2de2bd45b61ad39196cf263e9cac3cdde01bf4d636. 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/BK4DA2315690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08416b507a4d231ff67d938f8c06c6a9673661677cdfa084fe7d3c32d78c89bb. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/BK4DA2314813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5551d7593905e036c66d64444c0459f5816e3e7d7494f3ee6077696fc8c339. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:06Z), 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/BK4DA2315692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4720c73f89d2b0740b4f251c44564279e9be5797a40635d2be955c8a1352a0bd. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/BK4DA2315694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df03598d282c89cffeef78fd4c73a6f78b6a14ec76e5d2698770b2a4336a004. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BK4DA2315695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4df5da0839a696001dd1f0b0c5ef798e8d94a917b6cd1bd5ed8b65cb295151. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/BK4DA2405251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb734d56fbf0b44801b7ff61e928f0cf6553e1685456412a475f2918cdf54532. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MX1951900048.