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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db87426fc5fc13651f702d393dbd3562b32ada963ec60810b466231b997309d. 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/d2447bbb-ca48-40a7-a354-d47c79f1a8c4.json and https://artists.proofprofile.net/proofs/artist/d2447bbb-ca48-40a7-a354-d47c79f1a8c4.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c8f3145316f802c0b88029ae82ef71ead62541bec7bff6dc92b0fad488a9f1. 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/QM42K1992027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bae2b0842bafa2fe07463b2cb439d7bff916f917196ac6bb7c29b5623d568c8. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QM42K1984101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd5066114955459d5a4a8e196352a3d14b5941b820497f6c4ce890613d59cda. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM42K1947976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8410ded6cf2e6fe2846412d73c4420d72014573e9745a55c2bee4796ca66a1e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM42K1951740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d530a1bbec8b9cf58db9ab769d297cf331bbbf68cda7f3ca94a2290b1207d0. 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/QM42K1953528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3aa04e83ef936d52f36b030884a806e57312e061a92b78b51299ee92e5420c5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM42K1905221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaf74a5714d247730b895f3373fb9d9b1de23e564b0037c6bc52e9fb308edb5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM42K1969143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2612c7ddaa8124a0789715aee673cfae52bd2bc68757e1490dc342cd74a853. 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/QM42K1922623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d93637e2bafa563086f3bf0a0c653abd32b20f390e0d9d2414064da25ff699. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM42K1904715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1810cf3edc5117fc6c4979e93a21b981e8bc1b72b3c96380e883c747f8f1338b. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QM42K1948415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7941aa5117c89856145e2027a7d551d9d6e8433bbe6fc25798964708458e0e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM6XS2000550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fd765bbedf5749cdf8ad49c1abdabd6f6e5288bf9c58c09c5c6e1fa780237c. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QM6XS2000919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a949fd3dc115da4b327a3428ef76a5b59095a1b1d5d4e263bc352907900f20. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6XS2000918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0058c5d60bb385717200e56279dccd4d437a84053afda4646675f082348cc1. 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/QM6XS2001458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c97505b36d23cea90fbe805e673b9f4789df0b9dab2754a0d525c1350dc74e. 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/QM6XS2001665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458c5b66de38d4d8888eb3b411187648244659dd48d117aae768fc92fcb6056e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM6XS2002054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6f33291d99db3d37770cf259321e59205de853635e78c27e932de2c4d4180d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM6XS2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5df2630d81b8e05ee67f87730edd5e5359ac1a67d2f1124b8ca3b329d3d8d4b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZS662173388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf18b6359e6f621ed1331a71096a2fac5396d5afbbfd117f62c2c1de138dd57. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZK6K2301053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e76fa3b34813f552dee413186b03e6b7673d497507cc8f2c06a399106592e5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZTAT2376524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27e2ed6f70696328fb86529e4fb185b699c1dd8652a6c5ae0db4a63a40a8535. 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/QZTB62379740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d35bd5f37d566dea93f734a3ac3649e34cb5a91ad44722f0df9faa827ae849. 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/QZK6P2411295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65282917394d88669f7eb347a269d3c91002788d565fccae820845276b693109. 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/QZDA62453557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843d5388a23bf09e17ebda6431ebd069f5d9695a54f9052074d923d22112a0bd. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZTB72496446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc61614f8a016922863bd5fbf5b216f8dfaf1d1f4cf66f56a1f280b0be0c295. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFH2438721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8083832552fe7813bccfea31ad21b57090333c2923b4868736d5ba1758a790. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFG2456687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e38335e18e4b2d6206a96793e683d45c36d837284adc0062d939a38245a49b. 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/QZWFS2449040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d77f9e77644c3daaf2947a90bdd63fab4bde5e8615077574ef3cfa9fd5040b. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/CA5KR2542340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffae20a74fa63b9cf8923133abc0ccac26fa94a13e7b320a5c9065e090857e1d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/CA5KR2542342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddf00db4a035df5882bf1fe4b578c8ffa77283bec55a71e6247368d5c9fa6c9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/CA5KR2542343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e54f533aafaeacc6db6274ce7270250c21f8148e795300aa0a7ec26095f1040. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CA5KR2543263.