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 0xef4d971c8ca6c312f7ce285514d72af5d4d54312b03bb6f7c3c857b85ff6fe9b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb675a4b-84db-4224-81bb-cfb76f5fd2e9.json and https://artists.proofprofile.net/proofs/artist/fb675a4b-84db-4224-81bb-cfb76f5fd2e9.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 0x06606ec4686f1e0a5d8c00cd3f16b9e73a3d1d5ee97923b67638a4553b178b1e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:08:57Z), 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/MAA172000560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b825b8a38029b9277f7ee444d68db2d6c9fc28add21f74940fd2b20941278b. 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/MAA172000561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f032a2c5b26af5746c085fbd079a6e540298f4366f9f0a25cecae51829ee250. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/MAA172000563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d133d80bee60a73a4039c79641fc7eb9a1f7c26c7bd968fa3075f78b78f5b5. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:55:01Z), 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/FRX761556444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd6a4618dd1d7276cb7c28c15986555819c5f3e509d307a4e143380f54f52d4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX761556447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4867fc8ef01fe2d7be6a39434b4b52d61fd1591436e0ce75feb2c53fe0af76. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FRX761556448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6fa340e0bb4eeac7d3d2bf7a6283d9a614bfd2b7131a98bc951ab6c1a29b37. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:19:42Z), 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/FRX871521274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb9fba1b789776c146348dfd3a279ad1f69c9a85b720634ec3dd43fe7c956cc. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZPLR2435848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0d0fbd1607e1018d9816da5abbf9feb28fe8cbf130a1c6ff791c0ba4b38ee2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTAX2420212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91e64bc70b3c3e348f1223fa38b5b873c5df44f36fa2417bd2cad8f70b4ccb4. 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/QZTB32471024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b66539c122ad7cf6b9a97e3567e8c5e3e4635ca728781a2d66d1221517d8104. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFL2405740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa706c7687589664615630915074fe7bc3354c319f3b618ac68753218f0343bff. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:21Z), 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/QZZ7S2437475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0a41059258bf55e72bd2183c7dfe15a3b29c966133cf9d6e37fb9b646c8d7f. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZDA72525666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bc7f9b6cb35f31c3df5a9c6a2f0ccbe18e126841938e461204672ac58d904d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:41Z), 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/QZK6J2569817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28406cac181e89969cc71c6c7d90eec252c59918229b22845170ace38e25a92a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTBC2586597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fef7fa2a915debf89884bd6baf1b32f1cd9822b6c489f283c18b2880a0c7d15. 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/QZWFR2516574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268fe79258a2881158898277d113151fbf78d812ac26f8e987afff50c7eb61d1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3EX2565506.