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 0xcf3d58e4844eb3bd5d8f598345567706fb3b22ea32fd7f3dd96b2865040504ba. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9b4e201-af24-47a2-aea2-809e4882edeb.json and https://artists.proofprofile.net/proofs/artist/c9b4e201-af24-47a2-aea2-809e4882edeb.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 0xc41cb1c530c902698d03be064cce86c59dc75a1b566631fbbd9a1ac589b9626e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM81365177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6dc11bf14cd1d5f013f71120f21566c07b6f5cebfeecf65749bf11a762aa78. 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/USHM81365178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589c2da62c55ddd765fbd8a1c7c28b6ff2c960c737fe9fe227c5c0dbf4af07a9. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM81365179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e30b804d93301bb07ffa08f4aa31f7882b0c99eeed4f15bd810495cbcb3cc4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM81365180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04c15053ebbe70a583499d20dd6a52401bb8b11c0edec80fc353b254b9eb383. 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/USHM81365181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47cd2469a495a904383e7cae7a767124cd7f54f1e88a39187cb2daa74ca3458. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USHM81365182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82243ffbce84a440ad74c68613283da49ed9b73e2b38abeaf94ab3e5f736331. 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/USHM81365183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c452612d5a1f12a2a17a01c067bfe28a9213c56bf8a6d82180e364fb0691d. 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/USHM81365184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98271a2fde3f84b442445b75bc43b7d432126545daf4c09d7048abf2b897d835. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USHM81365185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bb031fd6954330c24b2e02817bb8e17a2d5fea5d42fac0ed019c3638b4b64e. 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/QM49A2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c4e082defa5b99d89dc37b30de62103a6b05653c2489b4c68b10d72c8bd7da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM49A2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41226d25e9f2bea49fe0915b0363c38bafcdf9ccfa850e15ba4719051295d39c. 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/QM49A2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a3fda6f9c8595a017977ddb6e981433f29181bddfc561ee5ecf4dc7f70926c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM49A2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577c14b74690a99041f92324bce1cb82b05cc396f9a2b8f797f8c831bf5eea95. 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/QM49A2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffec49ffbcf6d802b470fb8e3c538111a78101ef635a40c1eca91449df9c180. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QM49A2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1277bf0b3cee1e8be98808f847c21af2e022f0d50475c726b94bbbc1a8871ac. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM49A2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a34e2e61fa7dea95491d2694d7263f67d182f49efc976910dc4736e4235c47. 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/US3DF1913384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81343e43b1c6d4dd30b0fafb82df1eb5452191f458ec06d558442d904e28c4f2. 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/US3DF1913385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7294077ac523a587446420be60cbf0dcdd150cb7c57fcfb9fdae770cc37f9af7. 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/US3DF1913386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76f0afe9ade0431981df3fcf85ecf247119c2334bf66f79f46fdd224d26d77f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US3DF1913387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62296828d29e2183a1653d4591545f4653375b0a68f5848fd9851e2c6e3e0696. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US3DF1913389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbe6692904a995172a26221cd32d1c07219cbd4f3de0ab3bd5e49c8bf7bffe4. 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/US3DF1913390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a94c942d764487c1d557780b29d5c09fa953cc94e4ac85c28d304d5ea16152. 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/QM49A2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1816eb8941e0297f35fb4c8545c9b950a3f54355c05e152e6b1eca10163f4244. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM49A2300003.