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 0x6918b2f443b194dbe6bc58084a1434b04c87f7f9931c085db16140ad3e8abe5e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3e62979-af73-45d7-a3da-84956aa0cd77.json and https://artists.proofprofile.net/proofs/artist/d3e62979-af73-45d7-a3da-84956aa0cd77.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 0x730f2b0ccb918a9982fe4af2e7800d84b4e31a03f10689b9d41125d6291da0a6. 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/ES6642100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1911ce1e91e7d15f53f68357fbc84560dc8fe0bad2d2e5558a9aea0b955760. 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/ES6642100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aee11a64b63e7cad16aa6b1ab77dcbd63d8fa9f1f6e5d3eb4517c88bd546b3. 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/ES6642000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94471489bb3a7aac350b205ee4ea7f07e2b1107b66a6346e1fd5b4d2638a34e3. 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/ES71G2308225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc150727d0add968bb8427d4b2010a0c9961c6c352fbc58692c0842d2f4d6cc20. 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/ES71G2308226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4ab56fcd6c2cd3afdd77f89a9198af0a13e5c28d5a9f50de2471d42168ebf1. 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/ES71G2308227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac85d9192da98b0d4ff13ebc63a76189b064ba1120990fcb46bbe91588855b55. 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/ES71G2308228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4235c281a4a5d9b33cbace32aeccc01b87b67853926becac96a8c8a3cb573e. 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/ES71G2308229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4667cb5f596d27d4a8615fbeadf0e52a4053cc31229a403f0d3856d7468baa80. 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/ES71G2308230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e1d605bb4e37d8588988629571591490d9d735bc195156207f0ef01cd956a5. 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/ES71G2308231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d65dd9a906860ee46fd0e518ac2e3e0c3ddd4293a5f8eb3c0c306db5ac5ccb. 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/ES71G2308232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ebd07b90869e139995eba8e65b955d675a8696edfcfbc70bb73a1e26a47d49. 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/ES71G2308233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c8c2002990c5b6808611ccccf076805b93f5eb421dfbadc29592c9c54bff98. 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/ES71G2308234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c392fd98d31e2e7d7af227d34f6d4ca42d941a471663aed81c7efca1fa273d. 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/ES71G2308235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4b077cb2ea76909124e76ad6b86a39ba8c5167868f26b84239d4fd7747addf. 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/ES71G2308236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9fcbbfa295804f94c53799c1da0436fb81743ed938aaa55e6a1b11a5fcacce. 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/ES71G2308237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476fb90b61d4e35223179af9ee0054cc56a4c92736c29a57eb286aaf6ee72a2a. 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/ES71G2308238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a90193e840d4409da5508870afb55957e12e3fe06fe789537a547bc36cf7ea3. 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/ES71G2308239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be1b99b66b2d4504093507267f1b12d0c03480d3a23c62045017a519a210a42. 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/ES71G2308240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d2cccc1444a6a7a2f7311a4d82e083db4623b8e749dc30ec5fc224fd889855. 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/ES71G2308241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b4eeed3353679990c11543b9c9f0fe43f509279ff6eac539742c6e16e0ab63. 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/ES71G2308242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5cd41503158f05cbbb871b68f097401053d1ae00430dfe7b5262d6fbbace9d. 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/ES71G2308243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0bcd1d1c5c5bdeea8b95f0d0cd47b13ccf9a07db8540a449c42e1537c61ef. 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/ES71G2308244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b1f08384013e9252d410c80ddc096c9a0b59adebc0ab7afcc3b639ac72ce8a. 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/ES71G2308245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5d63fad3453ee680a999013bd01d9aa6fd73e1b90d4d0bae6ea7a0b3f21cd3. 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/ES71G2308246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e24a2c9277c10b97e9e24a18881fa8935f537b0218c0e60861dd6e9d22b3839. 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/ES71G2308247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136e0d33d833114d0aa3c4a0457554b5f6795c7db682cb4a52a691bd7a57a3b8. 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/ES71G2308248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f41a387d55eb7f11d91388d496dfc7c549caf44974448ac2f5ae75642521a08. 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/ES71G2308249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1676c65909dc490cc790efca0950ff8cc0bf359b6a9f16cc3b3911a0e9403e. 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/ES71G2308250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4bf85fb32b65c90f516d97f67b76e039dbd8614dea3ab4e6ff79e2d0c4d227. 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/ES71G2308251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25df56a4f94c123fee99bf6a62ad8ad1682e1fb4f99a99475c86a7b6d52aae78. 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/ES71G2308252.