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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2da6aa6c3fd95deface2836f9615260a88ac5c4edd98272e02767102750d744. 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/8cbe58d8-96bb-4d26-8812-b713e183b753.json and https://artists.proofprofile.net/proofs/artist/8cbe58d8-96bb-4d26-8812-b713e183b753.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0495da3045bc54610fa7de36271a55bf996281cd1a7682368a1176673b876. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCJPB2459874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9916f2b2262bb020ca36a3740f555a1f40635ffe79390499503bfc2b03d03c6. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCJPY2339601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2adc7ddcc40b740edd8faae1948b73aed30c9a5be32831f21644815224fc06. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCJPV2350959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8172276aabafb1dc5a603f20829225bd66aa60832eb1ad1dbbf643201f892b6. 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/TCJPV2350963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178ccead7ad86dfc7794b707c8a86f4a4ab53893818cebf3af67194b4721f671. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCJPV2350971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0398d60de93c62d99f73b9e8985ce7ff7f611bc052ea55192ed732fab4523d18. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCJPS2281209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74c4ad01a4ec6a181682e93f599dd3758b9ef39e39fed02ff3886e73dd4c780. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCJPR2253895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25adcc9f82ad389a0f68bab487f00639fc4da9ef1af8b2d8a43dfd4f1bc33981. 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/TCJPP2195832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110bf11916b9f525d267a5b7f72c0e2af400390e90129c1fc66593f26034a833. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCJPZ2432035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc531ebcb113517967e948c6d03334a5787d700b9b4632ea66a960319cddfd069. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCJPZ2432048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2938abf9a795ce4f6d4e14c5d0ef2a3c31d3674eea584bd2530564463b56fc21. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCJPZ2432038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb47c1f1662268d8fa9640d78fcd13a886e13bc9fe39a9bc9b18ecb647257057. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCJPZ2432063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9af728acc29c987148eef4409f8c876744977027b904f5ef6fc834f4e17a226. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCJPZ2432051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa779a89948cd9ec37b27f144e6e35ad5acaf206607f23b74ade7d0e39957913f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPZ2432049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a30c7287cfd6c03e089b5ef1c2c2b6b3a07968202e96722cf038f6f5e390cc4. 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/TCJPZ2432054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1120cdac02988d45dd5a373e6e54e702296b2a9c415947cc4ee042db00d97b4a. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TCJPZ2432071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e8b7792cc2c9cdb04bb1d3ae978dfa9fceac09fe9c143f4c70dbc5e6a3fba8. 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/TCJPZ2432078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e445c120139d58f80b058b1fbd45ae678fe58d8ed7197cdfa8c058884edd2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCJPZ2432291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef1899cdf5a60c716baac527c5f6e23ce05d2bd66a07f9558198bc928c41fb5. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCJPR2283170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484ddaccbaaf47b185ba4f6eee3f47a96c97e89c8203b2e016e2f963875f05f3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCJPS2231795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc205e85c501b715c9eed8238e3602e3ccf21e1907425793a72858515e5d78d9b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCJPS2257614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7c1c51b733fc4b9f7d2672768d4de1dd6fbe98ee53d5cfd190b37600dda21d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCJPS2229028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad1f0b31e9b14699b641ad31bccf977bec9a655e9c45702e8e5dd1d3fbc9eda. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TCJPX2382063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd57418821160b5808d39d4678e9ccceb42ce9f35d3948bbee0918f2085a85d. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCJPX2382073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91210552d7e2ae5cd625df95ee15005a16b9c3a737af755ae043e974c5aa09ab. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCJPX2382080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd271ffc58fdacb97c263d26949e754e4123eafa48c0539d466edfae6c933b5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCJPV2352695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e34c7df960de6449258194195b9588979be4b049a8583d7efe3bb83f6514a9b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCJPV2352732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae4f902624fe0f1dc95986d0ad981c861d183e990d4c411c8e0a4e7a9425527. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCJPV2352758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f0be83a452b776d458ef9573d98a41527c459c502fb2eefb989290f4dd095b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCJPV2352765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24392827040e5f853a60cf9967844cb1557342d1982e9ff350241891d2ba697a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCJPY2499367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a4cf4035d7d3d2accae37483afd699f3e970844afa1ed0234f5fee869f2ded. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TCJPY2499372.