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 0xb432570d52b420fd77b0aa46307d00f580b91a8c405071b8c16dfc82db8658ae. 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/56c498b8-89e7-42e2-b1f9-bd9dc39f3aa9.json and https://artists.proofprofile.net/proofs/artist/56c498b8-89e7-42e2-b1f9-bd9dc39f3aa9.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 0x98c9194f93ae56dbcfd3464e8bd9b33a3118d341e128c0369648d3bf1474deb9. 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/NLYK92300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c19d14a23ca2b5c16b031ee290d34d984ccbfdcbad56cb2a6a4547ad2e7c7fb. 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/NLYK92300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190b3f978fb64c4192f11508b6e816348ae5d110b67d656c402a0a3141c0bf34. 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/NLYK92300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ef8358108db42084b514bb529cd3dd06f70a171d5ac3f32dccae457213dd3a. 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/NLYK92300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7934c9be5537d3ff06452249174e37b4b714af30e163a3c079bd2047895ec78. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLYK92300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2dc8799ce3dffee8383e9a806c3c1bee0afae92fd1444a7285d8bc28c25d21. 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/NLYK92200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfad5ba4919198e84dc1bf1c743eb40f7d3e331f6b4b015d48aaaee727fe1be. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLYK92200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65d6d3ed9140e311c1dfd47e34e4011458c41fcce638a660cb211a27ee1950a. 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/NLYK92200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3e2d4c8bd5b6ff844c6630ee1009e3ed5ee60a7a4981ae7920d29edc20e425. 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/NLYK92100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76cdf1550164b3dc0cb497a0c808bf377d786e78972ddb382830252c4ffd72d. 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/NLYK92400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d872afdca57c7d0b97b2dae12e5ea0de321bf6728815dfa8c338d4e7a250dc. 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/NLYK92400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fce738877aa5d46456fe398d17ad0399a445fe5d9cdcbf88268ab370b0348d. 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/NLYK92400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a654bf421c49ddac30d730e7cd222622de41bc0329d3c29334c40eb155961. 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/NLYK92400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2d3f4bd41f6f49e10ce46d79b3fe15da4ce8842d1bba6f3c31b3b8e17aca12. 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/NLYK92400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f32b8022eb8aaaac20622e3ee9fb1496228b5b0e0b7c51920cf773c36c875dd. 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/NLYK92500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d06f6c423847b19edcebe801eedb670243b82f3767ec5b0f99a5640606eeb5d. 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/NLYK92400289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e6d7b99a6718ddaf67bdae73218f7a04ef95c1da01ec5df8d9d29db77f2e93. 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/NLYK92400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11c9a71b381353559d5bb463905c4666fdb133ad011ba95b35d0adc40d17cf6. 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/NLYK92400209.