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 0xa65903441c4797b084c3c6a34ea8906133b57536285eefe5f89f14da7953b704. 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/01e3c743-edb4-4986-ae0c-9b13291187e2.json and https://artists.proofprofile.net/proofs/artist/01e3c743-edb4-4986-ae0c-9b13291187e2.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 0xfb555c11cc19df6aa1cdd2562241490eeab42a9b4dc5bc976e9645bb9f73077e. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZ8LD1712177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa893eb4b9dce94f90113d3cd3072cae7f04e8121cfa97687e9f70dd216848982. 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/USDY42092353.
Technology of Freedom * Intiche & Yi Zeh
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb87c2c9d69ba43739373a65a1fc21465e82603f39961600abf66a51d21c47f. 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/QZHZD2068894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb87c2c9d69ba43739373a65a1fc21465e82603f39961600abf66a51d21c47f. 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/QZHZD2068894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc854f692e352df06d4b757a39e525788b498995be8177274ca954ef1f981b4. 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/QZH5E2112902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31efeaecb9331a1680bff292a6ac987961df08bfa4c34c117475d161f89f927e. 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/QM42K2558540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba115aeb736d834280e51190d388dad21f7ca0c19decd78a49b1ee5e370fdb09. 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/QZH5E2489649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7864ca6854e09e915998af1dd8d3f1f78ae389666c5b82a9f87423b7e955b91c. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZMHM2581670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18ff82393ffcc610a7f5fb3d84ed8911795c86cd3713e18fb81ac5a4aa7e3f7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2512590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56dee4a48f3d79cf1f862722c7e4f7d88101dc4ff5b270171bc4798da2b30ed. 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/QM7281861303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caff6c156e1b68b7677b81517b6f4666acfb6d35d3763ff3c1981fb38b7ffcb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU2092734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe046573a71bc4df67d012a8ef30aa22184e8c0e8e21b2677d18a29e7f595999a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZC5T1900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbed67468b384242641850d72de2bf7ba98467667f1ec77bf404ce852690f21b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBKQU2092739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bbfd361b40ee79f6a61f32f07d1e1bd08646f7b662bd080dadbede31faaafc. 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/SE6QE2246755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804d839e01f6e11865e9d6d33b2b7ab8b0e0ef9f2eb9453f4190334e7c3e7108. 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/US83Z2039550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ced2d54c93d31eefdcf750ed07d031e92995263723a23c99a6b43f041868bf8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZJRC2097368.
Antiguos Dueños De Las Flechas - Intiche Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b95602ee1f9e55dcb62a0f011751e2428065e94002b1f97fa76c7c16463b31. 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/UKLUL1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14949904c4a6d90e9756a835ab0594db9efe44abb138a5dd43302a7b8b04804a. 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/CA5KR1949182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae7bf85d407bcaafff1d9af0d40118c8cbd03deafee7ef3ad20ff1012f0e7b5. 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/GBLV61818659.