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 0x2775c5d35a2067bd5df86b25bff381dae2e7b6d8bef989a00de5ccc5c75e6cfd. 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/a7f38ed1-4bf7-41ac-9523-dfc6f2cf59b1.json and https://artists.proofprofile.net/proofs/artist/a7f38ed1-4bf7-41ac-9523-dfc6f2cf59b1.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 0x236b34577167ff30aef078f23776a97eb833c8bbde2be46f81c4a45dff8fad8a. 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/GBKPL1807035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce246073a3201fff892c1e32f389b04dd044d5818a926074c25e543a8da275c. 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/GBKPL1899757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bc40df4fb24610df92c416873ee56b844b8d359f9a1517f1052367dbbcc303. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:31:40Z), 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/GBKPL1802607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364b675b3644bae02221cb71bd9bd2e703a44a79b0dd0df2657e8d4dec2ac597. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:30:25Z), 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/GBKPL1812592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4100af69a85197384867320bd77b630d066558ee46a85f022e8a56d79145975d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBKPL1832260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f98a611a14a6627ee9314b39b63b8ee2f83676fa368afb1ecc29ac64421c96a. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/GBKPL1953149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe217326792b23caf6396d87e2ccab9f6a2236da9a294be70f85d9366b5e01db4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:39:25Z), 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/GBKPL1975106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b565c09e7ebc5b76c62512c41bfecf7e23c5f27b9720b68922adecfdc34ecd5. 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/QMRSZ2201308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e28b7aabf5dd5f53cd04e8ef69e8a9f763e363ade8a9e676119959a2cfff75. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:47:17Z), 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/QMRSZ2202039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f580cc104e56a6857a8bab196c9aa60d53ea64be36c76f1f22aacaf095e2b3. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QMRSZ2202134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60ebf631d9d4a6367ad84e96661541946ddfde9fb487e7ea4f94c3351603a7c. 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/QMRSZ2202132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61db04741e1557a43b6e26745e94b58daa473363d5f5ee6d2570938ae707b72. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QMRSZ2203934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2134255b9a408934a1b9c3b4049a6686eb2c22dcf2510998774ccacf08b3ac78. 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/QMDA62312311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2134255b9a408934a1b9c3b4049a6686eb2c22dcf2510998774ccacf08b3ac78. 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/QMDA62312311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2134255b9a408934a1b9c3b4049a6686eb2c22dcf2510998774ccacf08b3ac78. 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/QMDA62312311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadf2b37d3c5eb18c52eff52a526ca23e756a33d6116bc7984567aa3abbd2ced. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMFME2381431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a985b0ee32773e1a92378152bc02940323bde5368dc6ee11da746c1f7dc0194. 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/QMFMG2349007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2134255b9a408934a1b9c3b4049a6686eb2c22dcf2510998774ccacf08b3ac78. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMDA62312311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadf2b37d3c5eb18c52eff52a526ca23e756a33d6116bc7984567aa3abbd2ced. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:33Z), 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/QMFME2381431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2134255b9a408934a1b9c3b4049a6686eb2c22dcf2510998774ccacf08b3ac78. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62312311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadf2b37d3c5eb18c52eff52a526ca23e756a33d6116bc7984567aa3abbd2ced. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QMFME2381431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a985b0ee32773e1a92378152bc02940323bde5368dc6ee11da746c1f7dc0194. 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/QMFMG2349007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a8b2e92420221ead849fd919b95fa08f21f00a2d6cd27c2277e37c82e093d9. 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/QM4TW2474854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde409eb356327f377e08db8c5555dc3ba75987e91bbad712738fa0b721f68499. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:21Z), 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/QMBZ92478656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea4d3362e9adf59dff4c48cc22418cddf1c8d61b57bc8f2f5c0b4272d30c2b1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM7282474091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea4d3362e9adf59dff4c48cc22418cddf1c8d61b57bc8f2f5c0b4272d30c2b1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QM7282474091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55902b3c0088403250faa0a9775a7739327c1d695bb32dd390b836e74b07c90. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6P42482679.