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 0xc80a5572356ac8a53b8ec5b9c4c7bfc16988725873015db10736e0fc4afec63a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2f18425-3397-4a5c-a669-dc6a4fc2c698.json and https://artists.proofprofile.net/proofs/artist/b2f18425-3397-4a5c-a669-dc6a4fc2c698.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 0x9b4e48541926e08fd5625ebbded8ec076b79bf81fe421e3d54ef07536dda5e59. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAGD2287140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86657d5faa1321c77d78772f2221f1878e04de26202d00d26f0448b77a3fb9f9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:56:47Z), 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/TCAHG2380007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2329a5d5955d830a035af7d4206216b480d77e27ffe0f687102613145db96871. 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/TCAHJ2396342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4007db135890ff91623ac7b75512af3f06fdc0f505d296f703048d8ddcf7668f. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAHM2335778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d1304aeacfde26d47e5e74dd5345d14f0f2490cb6b2373a9420ce6a5fcf1f6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:49:32Z), 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/TCAHX2454247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016dab986666276cc4d1c3845c47da38bb76408d3c2951f8886ef482079c113a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCAIC2488022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d5c7d600dc3d534b6baea85f77f285cb3aa20173bce86d91e85be7ff492197. 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/TCAIP2462655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a359e9bc9d7a5ef504fcf712123940a88ea9dce86b7db2415403596993ce839. 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/TCAIT2454586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4022602109b89d0aa9481c5a61debc2ba0b3d4e0726c804224efaeeacaafcd4. 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/TCAIZ2490575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fdbaa006e68f717980fbbd83409196bcecd55ff7f5fcd91fc2574f4478cfed. 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/TCAIZ2490614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089aa638db3eb9c0fea19979ec79953ec62c317d5c326c4fb8d7f0835ab2d89c. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAJG2541610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2750972c96213c06e9fad7e6af2ce42ad7daf415d44460a168450ccc829f00a3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJO2570874.