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 0x8263053785c39bb3f361c24f80ab545b220386a5663aaead807b0002ff2071d2. 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/821feabb-2e91-46f6-8ffb-649e6fbef8e1.json and https://artists.proofprofile.net/proofs/artist/821feabb-2e91-46f6-8ffb-649e6fbef8e1.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 0xef66a60c560b52283001e7d3809fea7105ed769e94f3dbd9df9e926f46a773ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES92329297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62e9993f5076ddf2120cd1a6579771a2da9b7da0571c69071f703c848278c83. 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/QZK6N2341494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3035f64c6112d7398654107c41e537cfd81bbf757228092817726fde01622bfc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6N2341495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2449d437502bd79e835b8cfbffb43fd7d964eef827862f5e3d00dc08f3555631. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES82324870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02a7feabc80226ec7efe98e7e6fe30c89af01e2afb0f23305e1d65029ca5a5b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6N2341496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f93ae4f434181f9a15aac435b7e990e466736c275e4a8142964344169be8ccd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6N2341497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86d2ca6428edcf0f4ab3370b7401d481ae8beb7f5e9cba778796b64c595768c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2341498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e7dd2481bb60e87fb4ae915b958ef880a407a103025adda7b4602fdc37ebd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFS2441169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309ddae215648ce2687ec0d4af4e82d4b70e4b0a4d3d8ba162a429e75fe4f809. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFH2441734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6f115255b2a3c171512ade339832a8333dee1b00951b0708c39799c0d208b9. 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/QZK6H2482295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dc95d583532abf187f949ba3aeabe1f6e1b6c57febc34481279006328e4f54. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFS2441170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf6ab037446431b904f940c42de6e5f31c3e70e8c9a0441546ba69c8394c230. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB62412728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa661a40dc1ae9fc10ee74c5f9fb5e44d2f9240f1641dd9c0857b86c4a591f3b3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFS2441171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309ddae215648ce2687ec0d4af4e82d4b70e4b0a4d3d8ba162a429e75fe4f809. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFH2441734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf6ab037446431b904f940c42de6e5f31c3e70e8c9a0441546ba69c8394c230. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB62412728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6f115255b2a3c171512ade339832a8333dee1b00951b0708c39799c0d208b9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6H2482295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfc389d25bab8ff8fdd775d70595d860a0f61f5f8d14c2126c22f920a7e037b. 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/QZHN32493773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef66a60c560b52283001e7d3809fea7105ed769e94f3dbd9df9e926f46a773ed. 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/QZES92329297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2449d437502bd79e835b8cfbffb43fd7d964eef827862f5e3d00dc08f3555631. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES82324870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33165be5dbecb83ed71d734b03a4e092adba420277f954c3c2709ed0142c33c. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBGLW2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e7dbc5c6c7ab0b9b3e966e6b898f028c5dc737c6e3bed5248c6855c027f9cf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFP2572680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aef279367ffc0f568bf07effb26c72c262a8ece635ac0c5e98cc4f7aeb31ecd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBE2513207.