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 0xd4d29b4862ca37b26ed8654f218f55b632c4262d6ea51d27db35ee2566da1794. 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/c05fa539-52ff-46e6-acce-1d6f5a7c4da7.json and https://artists.proofprofile.net/proofs/artist/c05fa539-52ff-46e6-acce-1d6f5a7c4da7.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 0x52ef3b7e8ff9b8e735db55f3cd6c35b6a5b1774d8ceccd57a7c128f8196560df. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:06Z), 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/QZDA82373167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf7f9adc7113f692f3c5949a505450201575b4660b0da671d6868f29b2c83ec. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFN2342914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b37404a0575d617aee15e1c31d6fc90b4cf27d29f447a872eb950d69c2da1d. 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/QZHN32429401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a217bd3dc1ba5046138d868318ba0c159a9db34bc0cc79a829c58beb359362. 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/QZK6P2464341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5245c693a7126de3a8acab309748f259121d9941832cb4c1f00c3f7a415a6e. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/BK4DA2432877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02a9358074acd00a9525ca33772b0d701d378bc29055d781a491bfde11ddec5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/BK4DA2448147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4bd52fd4ce3c44019ae570835a3e2359b481708c3d381c683a908717ab65c3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2456074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efa775e453e5de6811b739a4e49294f06f6a3d438aea9b4d9623ed0e5b74456. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BK4DA2456124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9db4c4ac0d7475a735e5e19634af0ce2072a4a7be4f7da1b16b43a8de9dc60. 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/BK4DA2456127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17f0fcd0b3e1be90dfc760fe5809daef5c35c3fff321ce080f907f2319d96ff. 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/BK4DA2456403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9371f4a2a22a3a7cea2b441d07f53e0a6648c8d662ff386dcb691f2bc2cb1758. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2456732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb501f4fcce561e6cb56586ebd4035b1c2b31506d1f79c347b325bbf8210ad3. 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/BK4DA2456733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083ea4739e9b128b665364345ac595c2cd41beda59e72bc36829926731abf6d1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2456736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c4f86bf3e6f37f022ff7ed283ee87cdd0271445bf426ba5ef0b1554853f03a. 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/BK4DA2456739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c6e60fb61ce25cf915367c4520802dc888ff27b986cbd0747c5beb3fc77bcb. 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/BK4DA2546535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f098ea3fdc9c154fde869d40d77d46fddea04c7dfaa7b185e84fea7d285de1. 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/USA2P2441613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ed2e25ff4c2fb3f1add4924d13bbbb184dc73b7e730164a49d5df45e97a8d8. 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/FRX452460514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ed2e25ff4c2fb3f1add4924d13bbbb184dc73b7e730164a49d5df45e97a8d8. 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/FRX452460514.