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 0x4e59ddc5a955b8969a734a0daf859afb975b9afda9830536c9e496977135478c. 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/ce62a724-f256-4729-95d9-05defac7b259.json and https://artists.proofprofile.net/proofs/artist/ce62a724-f256-4729-95d9-05defac7b259.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 0xe3c7125ff51bdad1b44123e4e349a552c325642809bf24afdac4c87e9340bfad. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/GBSMU6949871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb507c934d0c6b1637af7f70e698276b59392d3dee351504ad5e5ba882c2d949. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CA5KR1959424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2b96f289ca6be64df79470a35fa35ae318ed8ca76e67f4ffba24cf3ab8a54a. 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/GBSMU7472664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a66a207d0021dbb029119f8d8990b7856fc1fef1996d853ec3756a4ee3e19d. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAER2009388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2839be7de7a4e550fd0fe1f01e8e65433726a245fcf4152a065b57981d41c481. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAEX2004240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a59567d7a2719deaa75ffee2a9493d0481171595d3d68f6e8696f9e5ad7031e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAEX2004538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe869366659519dd541f840c507094e7115f6f7eb41b1cad9495ca2ca9536696c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBKQU2105920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e324c547b7dd6779b2a35a7b18b7300ed391d4756a8bcf944a7f6076a917c6b. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/US3DF2225023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd953bd16e753f76064471d5d2999678c23ae7700127f95b0bd12f11fa9e57c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US3DF2225026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1058decec3696fa6efd1e1fd8390006bd0a56e0e06316e1836f83c55a52d431. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/US3DF2225027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44d1c1f2472837d8098822e100a6ad7fb36c9394979a4a746b362a8c887122b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US3DF2225028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe926b51c7e6e06ec283be171db99485361049cc59b145a5a8cfa733f86b6f61. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/US3DF2253697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cae9a78a9bd9bba17378deb43e5caee188d8bc7fcb0be0d1a74034e90c8a3a6. 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/QM3DF2273799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0907895f4601a512266c1b5019561bdbeb1c8055b6b591850047deb01c68c0. 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/CA5KR1801772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe177889735c2248651290d50d1eea4b7d2e899b8291dfa7200e126b39d404238. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM3DF2143210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f825bb33801f422cd80ea6d64edffb2473b032c6d0c6c2138fef7dd917c6b29. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CA5KR2004699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ae7540db33ff1a426c6078b8b0fa2d2e254e4bb57b717d2f5a6a4eafe1d88e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEU2087133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d97ec04f98a1a4d675d7f49458cbe857fcb2cc8e06fcec69c56aab3864f5c52. 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/CA5KR1906121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f22e5bcc644e9f550168402884104187b2b05db9e25edbe17b2aa9e2dbebc3d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2180618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e15b0bbab96936eee328516573528941bfb6db32c83d04907f355994103b6b. 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/QM3DF2129419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b25672fd67b51a0187057da3f6da3a0dffa0cd3a1036f701b070452e0892f4. 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/QM3DF2001492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392014e49652167bb3bb34b34c72b0383172a3727dd906d2741823bbbf0568f1. 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/NL1LE2000860.