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 0x9d22610b0ae35f995540ba683cb2af0d727bc555b71e0150d49c211b0a69b1d3. 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/fd033d6e-2ce4-45c8-9f6b-4f22aaba95b5.json and https://artists.proofprofile.net/proofs/artist/fd033d6e-2ce4-45c8-9f6b-4f22aaba95b5.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 0x6ddbf621316f23c84183b363bab41ea6b9768b29d58a84718e403ec0a4c65227. 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/TWBF32306011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe6a7674a3e519385cee4b0bdca1e6c3a965fe6213142e845dc8391d9e6c8db. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWU712301388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe6a7674a3e519385cee4b0bdca1e6c3a965fe6213142e845dc8391d9e6c8db. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWU712301388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f09d1931771d066eebf4999eeb80d627f0cf92f4d2860fdcfbd113ac6ff2ee. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWU712303615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85db8a2f6fc0105f56631357b159a2a8339784c124ebbcf3d18b8d3acb778e2. 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/TWU712400314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7c7f590901687b034864caec93390b804afa15bdcce0ec24bae80a2b948c82. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA052251337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901684513573ecde512fb606fb850507e5cdae5254192d396420e00bcdeb0f0b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWJK12200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c45de24de8c5f851fc5939070519f0aee193de135bfeb5b3c203300420918ef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWJK12200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b3c64854f5ad8e4d5ca6939133fdf2d4c383ce9c2db4828b8105dcf6589f86. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWJK12200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768d99359fec4df7d8ab839b7efcf886641996efeecaf017224f45260973f60c. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:16:29Z), 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/TWCC32404817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3d629022123019bd9d72844020ccb85535743fb45a55f0c50e5f5dfba89112. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWJK12200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0122d15faa233faa074ba1a8960ed73e6650484a730c0d065a3e1278608e7ff7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRX282075110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0197fb721ec69fba007a63244c1c8fc88d69643c3449aaeae08e62713290fd3e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR59R2236116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ba861c617d9b1230792d234c489d8f275440fea07c6247338d50f8465c5817. 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/TWCC32102494.