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 0x92ef83e0d6e8411abf0079d66903a1719a50ca794f5f8a38cfb686b4a31880ef. 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/914b14cb-9f29-4ebb-9fa2-7f63e9acc4c7.json and https://artists.proofprofile.net/proofs/artist/914b14cb-9f29-4ebb-9fa2-7f63e9acc4c7.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 0x8700d9c94c7a930ee64acbd248854fb965b5dea6a39f9eb21343e7244e96ef90. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBSMU8581663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8faa570fed2ecf4a641d3aad83b72e0db95e4f40cc0b5a8862d896a5e01475f. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:21:40Z), 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/GBSMU8581669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f095decaadb00efd7837b0c3953ee8b81e7574a7b3a3478c49114c505f757c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GX5MX2175884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e14d77d6a7477dd398787fa87a81844fe6201d479f98472f4b2fd00b665fef. 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/GX5MX2175890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea840c0b2a59b4f49c15b24828ee70b31b7a2f9559971ea50086469f0c7d24b8. 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/GX5MX2175894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716dae9c81e39cd7db38124ebad95e0508d28a5971307434369d453016adb7e3. 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/GX3HH2257749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14860089a489073bc5339f0259d4cd1debb05c909011615e10b26732bfadba65. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:49:00Z), 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/GX89G2256245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b47533dbaf3037497516f9dbd72de5d90201847363afee59c65e7c2efe6bb8c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:31:51Z), 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/GX8KD2365756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf487a127dc55af468ccfba25a24d1152cfb057ca1d97c93d009d1afac021c2f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GX8KD2365948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e35840bb423efc0c46cb1da5a89ad40e35e4b43df974a452c60cb658064832. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:12Z), 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/GX8KD2372732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb3f96231cbb9c685aa7abeb4e89aa3f829fe5bf528ddbae77dd3e696f1e4ed. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GX8KD2307060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e9f4db00a2f269bd9371c90d052e6cd08944f4f5fa609b05bd58ecdd027636. 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/GX8LE2382328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa375a50df08628785e3026bbb9e99d45223f198c41b6e762663b02b6c63baaf1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX8KD2450620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62192c96d999449490cd152f1834b3965b90542f6cfb94aefbf2e2aa0f41d148. 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/GXFHP2460352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61be5b5034827fb74cb4510e544ea1a66f5a156b53c4a530487e6c3c06274c4a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:53:48Z), 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/GXFHP2416134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bd42c7410fed2094765665adfe162b88f73b3c319da97e6d3db3666c0f6545. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GXFHP2440071.