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 0xbc91a77931a3431b0d349d28367566e461abcc811af2e5c10ab9d87e2f15cf47. 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/d68757eb-c04a-43b6-ab95-c7e3298394a0.json and https://artists.proofprofile.net/proofs/artist/d68757eb-c04a-43b6-ab95-c7e3298394a0.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 0xad6df3dce7a92670e7b39da5638ec1a12f591ff84bfe7309bf57147d6ae63fb5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN52382875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e07c3485c3baa4d64ff9858cda1df50afe31b1def5d8ee1d1293352db4ad73. 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/QZFZ62349836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21147ea7bef4f09838ba912473f8036a10121a155b082181d10f7701278c2dc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAZ2394342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8595dc92aa5340a8a1fc0b4c2850686d9810a67bbfbedd43001be7af71350c0c. 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/QZFZ32451188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe955891c5a8910b989da18d73fd2acd87b4cbe34390ae8aa8c99614c786b1c. 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/QZDA82404211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8185981153c9498c7a26b26c1485240feecf77048608084170768889539351. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZHN52422724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779cc84d24bb9a1d9986c087f0efe96aa8cd0c806cd0f71bd9c1d2cdabd09936. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB82465521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed657b754d73309b79aae3fd5cb2bc1ddabc04a8f20a707d5b1a5f9d045ac6d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFW2485931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe955891c5a8910b989da18d73fd2acd87b4cbe34390ae8aa8c99614c786b1c. 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/QZDA82404211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779cc84d24bb9a1d9986c087f0efe96aa8cd0c806cd0f71bd9c1d2cdabd09936. 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/QZTB82465521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d1654e8a00140caf7af8e4d01cf1715d4f8c594a7c9c0b24c35cf185797efb. 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/QZFZ32567846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c05ad2be30e96c94bc552c1c039769a665a2d7d77bb452244d2c88031e7e46. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN32560369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4dc61b1bb8ba3a775fdf82df38fbe11c7c816073f80ef64de364c6349afd2c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:55:02Z), 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/QZTB62535697.