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 0x3439151b15ccea773913516d14a3f870cbb3d77baa517848c3db0ad3c7b01650. 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/9b8e5dd0-4314-4d56-be9c-40f02440a800.json and https://artists.proofprofile.net/proofs/artist/9b8e5dd0-4314-4d56-be9c-40f02440a800.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 0xc0379aacde53e15a588a2a0f4dc0149e2856ccedbb537e70435991dc8844e3d6. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/HKG291602230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22aa610fde64df98b047297e53cb468683c5b35fad21b8f5d2d1b08465821d2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HKG291602231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfcc163bc8584423f376b25455e4b811ed040dcbfc20138d671eb4a2ea9e1ff. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/HKG291602232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244fc80a72449d8ca9b794659b8d6d2fd27ddf75165d514944eddc1cf47c6195. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/HKG291602233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506ed30d8521e5537a977e1d626bf49d9f51fbca25e679a52a60ad34e763b791. 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/HKG291602234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4420b645436ef94c65b120b22410347b8c663e81142b9443c223a3faa3bc733. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/HKG291602236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe6c7a2753c3888f4f7c717bb91f86f98e8e97503fe297ed45a7e8fc78f46fb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HKG291602237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172d0d62e15a7975abedf26e3fec39adaa068d591d14054046ca1d6a96d401fa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA371168809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ea1e272757c20b3d527f174f9240da6e9d72100ade068c4fe96b803a9d0df9. 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/USA371168810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34375144094709819eb03d618dbd9dc346b241642e410f8dddadcb946250519d. 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/USA371168811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f8be4c478aacbd7864c1cd397eb0e71a1bfdc8c35ee3fd7ba3029397b939e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA371168815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885cb21a42a2fc30404e8649f06ccf5e70e5ac9faa476302768f8ea791b081f9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/PHV021010997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2260ad0e985f7a605227df15f4736586721a53dbca5a00e1aec1a726ef54530b. 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/PHV021010998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3de04f56d6b9e6fb853a7d15c8eb4e76c19e065fb9d9e7d093ed8b69b563fb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PHV021011001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b661af759e986fc65260a2179d9bfb60ec7c7a161f5264d8e7cc6c0bc5c183a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PHV021011002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626b7259d5db7d465ed8da7dc0db4e2aa2052cb95612d04cf5a4898b22a5f84c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PHV021011005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07982f8d713848aaf1caee6acebdcf7e2a92e7a945d0b7bf9addcf1d261ff5c0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:52Z), 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/PHV021011006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4495db8a18409fdc149235721f3f66547491db31bb5c9958be230edbf67986d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/PHV021011007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351e77eaf748cd77f983c8c2c1a015c5f856e63f9c5abd968fde534dc94e3646. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/PHV021011008.