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 0x6f3e84021004d5c23f5eecf0c076236dec745343ca9bb9dc88b855fdb2e8e23d. 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/99f4312a-bcc9-46e7-8716-02d3f6002fc7.json and https://artists.proofprofile.net/proofs/artist/99f4312a-bcc9-46e7-8716-02d3f6002fc7.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 0xb7c0d9df0402cbe246551ca591d25d34c38f8e5a056b62343e5b224643e15d3e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USANG2293963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548e1783d296be5f2cfe82d433d2e318f78e1a4800e6f434079b9d677e176d81. 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/USANG2293965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67fcd78203f50a269616d3aa651f00792174bdb2543e4c0602597052845ed1c. 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/USANG2293966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1eb16c641b1c0fdb5c8fc57f476589fcfa6ed19d6bc106948639d68f2a4f2df. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USANG2293967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47910c4a4a0a56d99befcd68ff695d617934252a1bcf0c44a3f08bb4a40b4cd. 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/QMANG2210617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ce8fafa193c3c30006dcec90768d630d3cf6e6ed7279ccc40c96071f8962c3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US3DF2499448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579ea0a4cce26f973f13ebb37900aeea0e509115ce576236c673fec42aa59c67. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US3DF2499449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76470a2ef9911a69a8d3da801018423a804730f55a7d421816abf7c12048055d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US3DF2499450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd79f6c95911d2f9dfba82f69966c776cf0e96fee4ec134a9269a1d475fc29c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US3DF2499451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b17ebe69996b9572367662333b0ee680aded9b46c2856bc2bb050b629f555db. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US3DF2499452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d003c5b9a79c326980fe4e21160c353e373039ac84678fce668d381af602d8f. 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/US3DF2499447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca682d39a672fc9feeb49168501138896a1035f0f2e3749f9ca39e646cc75ba0. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/US3DF2499454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb21f1d0c36f91fff4acd29f5b7dc9a96fbfb0278a35d4a2c25c329115a0742. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/US3DF2499455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70736720684e68dd2531e273ef4a697bc20db0ee28dd66b21c319921f6c6be4. 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/US3DF2499456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ca3fe468638d7cf2905b176a790f00a3e9840f9d510312a348d0899fe3e428. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/USANG2466659.
That's not my favorite movie anymore (Rework)
Clouded memories on an evening walk back home - Reworks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11bbcd03f8084011e45fb1ddd6b304d96f2aec0d234ad01557eff89b7361635. 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/US3DF2536538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad16566de156d86295278e520b140013b963e85c4f73ef45401f16abdb28e086. 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/US3DF2536540.