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 0xf20fb381efa395cc84e8c734b49a71dd39edfa42b15dc1ebe85ffe86bec2e1e4. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ed1122b-7a53-4d81-ac7b-6a0c37517169.json and https://artists.proofprofile.net/proofs/artist/3ed1122b-7a53-4d81-ac7b-6a0c37517169.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 0x3d31e984fad992ecf63818d95a186d273a4a1e376a8f1634e7c01071274d9b08. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US7VG1844031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea79dbdfd064a30d51ef8f8b70195c3d1eed136da06c9b906e25b2e0358c3f02. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/US7VG1989126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36afa547ad3e3c9ae8c628d226cdab5097f7992ce02a9d6469608a037a45d29. 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/US7VG1989127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30bb5b33fb13e3dbe9bfde9ccfc9ad2a6a6e497a351b2419fc846616aba3ff3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US7VG1989132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0feec4dcc182de2fc07f1188b3f9d317bd780dc53681309cb0fd6174c88c37. 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/QZNJV2163125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f4df1f37f209c5957e6fb0e9918e2059b106e17f8d02cc5927b1e796d5ac4c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9M2249655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb54f351f1f3a5e60fb9a88862d91ce5c04bb736afa3979f3545e68b30c62e6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZGLM2333207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61ea0e74f1ca99a15d943d00c90e2b99dfdd2eb0151885e0158570f50c5b92f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZGLS2320690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2459bcfe634e4ae05f5b1acde80bd16636dbfbf1d216aca1405a802aa1d73f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ62180288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4451894da38438149f56e519713e672a81517e66af506e64c633870078215. 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/QZNJW2341154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4222eb8fa6e264e36521aae727aa8c4e40c9c959488bad7ffedd1edcfbcff3. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNJW2341155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb54f351f1f3a5e60fb9a88862d91ce5c04bb736afa3979f3545e68b30c62e6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZGLM2333207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc0468388c1b8068842aeb5b12a66ba6101f5600b060aeff5f0c8015e8b4b2b. 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/QZMZ92262346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f4df1f37f209c5957e6fb0e9918e2059b106e17f8d02cc5927b1e796d5ac4c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZW9M2249655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd2acfdcb568f397dbb37efb5856c07c1d00837b07a4d2082855b11c74c2676. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US7VG2180951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34cc6ea491e3c58c4a1e7191a0c4729f6581e15ac0015fdeaf880d863485024. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZNJW2341160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cef428a9e7fb3c88a867a04c9686429af2636b737823d68dfb904fe1688a21. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHZ62082213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f2b444dcf973906fa19a5531311169061026d493401795ddf218a526cd011f. 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/QZW9M2304434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0a9504d2b268dee7b1f953732f40f80c3abdd76cbf4156c9ee6a37d0874891. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZ5AB2482043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2367e4231bf92cff0792cf017584234f56a166a7a23a3a706ed63bf71a252eb8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJZ2468952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45aad6e99d61de72dc05d033d73592b5468d28c0339fb6355ebc75e3c543b434. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZGLM2565796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25b029898931a484ffa867d8562dd6f1f49a734e062679bd829350fba8aa3f5. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QZGLM2565797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe06262225248bdb3c90a7d1d3bce6a83d4c92ae20c744f90a6a0a1cecfa4c7f. 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/QZGLM2565798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0a9504d2b268dee7b1f953732f40f80c3abdd76cbf4156c9ee6a37d0874891. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZ5AB2482043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f68a2b3dce9c0474d3314caef9d477c7c35a77b9fc025b53587e966affe08a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZGLM2565799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2367e4231bf92cff0792cf017584234f56a166a7a23a3a706ed63bf71a252eb8. 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/QZNJZ2468952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acbb483af44dd90b44370ae4487c7ce4ef69f0a0cec75bc6f22716f08225a76. 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/QZW9L2468870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f2b444dcf973906fa19a5531311169061026d493401795ddf218a526cd011f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZW9M2304434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f3f30044a91042a2fd4e4dd0f78fa9dd0feaac3610361f4ee0dc53605db15. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZGLM2565800.