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 0x67ab15087075b8500e48f0c4339fc11480bf52c1402f4e3c0a80ce6ca0204f03. 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/41d55f7c-7b21-427e-8c17-46d0ad0b89ec.json and https://artists.proofprofile.net/proofs/artist/41d55f7c-7b21-427e-8c17-46d0ad0b89ec.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 0xd4ea3ee9cc13f43055bc306a15a1fe526e37873a5700c33bac8686c6e5116828. 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/ESA011864261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ea3ee9cc13f43055bc306a15a1fe526e37873a5700c33bac8686c6e5116828. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESA011864261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2385a4e2d715c12a572c97fc50a5ffdc845983a9d5d0c25d90804c91711b9ae8. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QM4TW2414372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee6710223b1fff639d865e7078ad750fd7d9e50a2b9717b185b859c090bc23a. 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/FRX762190891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7667cd380f52d7bf9feb0303a47081b28868b5f16cf721974319a25544a879f. 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/FRX872147630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954a878975f039d58eeaacdedafc55066cf18cfa56332573d7b32df34643dc0f. 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/ES71G2209149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026c66a048eacbd384d47dd1ac363e4cf3ae35352cfc98bbd935a13c13c06441. 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/FRX282208380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4665bf1f181fdb6c6dce122002cf89c62ffd9dec591eb1516f9a1616c6b35418. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX202221521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4322c48d365f813805d4339ab9ee0961d8ae676d5eebb75bbe44ceca11b90c4. 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/FRX872246413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa0b6fa75245e2c25a9c0f6c2009a6858e15f8a2c49336bcaa241fdb4983d34. 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/USANG2490297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5a3e4fcf0ce79a7c88b39e6af02a446ae6d2654a8691d44ac6e462038a038f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TX2308721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a0b535f068885e749068f3c6db1a0607323bb8554c9d997a5fe159768450f5. 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/FRS182127023.
Ring Ring (feat. Mentaguay, J Holland & Aren Martin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30bbce751fa7a61960a69d8f45d1a11e6f0965d5d2572c399602ddb0260fca1. 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/ES5152100577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb2b8e4ce59f971d9dd8d747bbe62f04fd171f00098a14d55efb2a68cc90b3a. 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/ES75E2207815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a0b535f068885e749068f3c6db1a0607323bb8554c9d997a5fe159768450f5. 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/FRS182127023.