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 0x2ae8008ebb8df18f55b649285aad53a641d77c2d9eeb894a41699c2ec9e675ad. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17b806a9-8f7e-42e6-a402-cc0127672295.json and https://artists.proofprofile.net/proofs/artist/17b806a9-8f7e-42e6-a402-cc0127672295.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 0x34c2e9e5f1c34b46c25dfd32dc87cb49ee548d2d6c341200f2bd1f6786fafd45. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:42:43Z), 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/QZTB82585370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9913ef941a26e4b7fab85a907e0ef481d2ece0ed0f84bbcf82929651bd435e2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:45Z), 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/QZTBC2582476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef198e64d6560c263656ac8ed5cb9e49fec4b90292d680c47f2d7e9cd2917f4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBC2582477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf103180ba1aeb6104126f63b593d69814d1e34155cacfc1e9a94f84d0a477268. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBC2582478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ffc109061001813619f52fa63179978139bb0644e993c5f7b6643bb38e0a60. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBC2582479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f7444b174428eaaa5c4d2f17d86f3f7ccdc6593e9d8089888e75d2bdcbb9af. 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/QZTBC2582480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd0a6b0f6424238c6edbb9e92d93a221c24ba0980a63d1c5b6ddae798e84b1f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTBC2582482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499b4b9f7c0678c7bf1a4f9cb12b2e1b9c195c1ca3132f651461c856bdbd2496. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:05:00Z), 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/QZTBC2582483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b47e30ad55302254cca95e0da7ab4d28dca0661fed392ccd20783f74568cb58. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZTBC2582484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea640d99ad0b1320cc133eb1e445907ea1334e7e93e6cf748c021dc58cdfbae5. 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/QZTBC2582485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07d620eafe3e75344126f8cc16f29c0f980c27c28d50980f169a7adc0431230. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTBC2582488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be952f189123989fc5b8f5357694159dd7fb9d1e46d40e6e398f4271bd7541e. 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/QZTBC2582490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44b3abb55356bd13ea2b8401d490981e326e43443dfcc1870f9584df5cc4ec4. 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/QZTBC2582491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f87a90be4f46ec1ee93a9ebc36ec6c3265e64461d06bdca943eb40a66500887. 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/QZTBC2582492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58adf2911bb7ec10c3d9ab57bb90514cc800b6fbe17f3a530f2cc28d48d530a. 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/QZTBC2582494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3885973f417feaa621a5b494693dcbc3104720739f4d1d4cf1a80519fc85b21f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:57:39Z), 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/QZWFV2562639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b689bb42cd1eb8273c8aa81b102f0be839bb852d545dba10b5a0c5ba4a785e5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFV2562654.