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 0x3e37667ef668c2665f1deea3c5497808104e0bdd75321fffe3fe121b36d33793. 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/a25b2ffd-e1bf-4d27-9c15-4a2cac305861.json and https://artists.proofprofile.net/proofs/artist/a25b2ffd-e1bf-4d27-9c15-4a2cac305861.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 0xec7cd60204300da6576f7f81eea64d3a5ded24de2ef24eeda6c15a7624e099cc. 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/US83Z2122802.
When We Were Young (L_cio Reverse Remix)
L_Cio no Showlivre Electronic Live Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c23a6f3f22d1b89d2c4d455a2db4a30037d55dfb2db28cfe3f058765dea1767. 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/DEU671702989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698447382cf446b6876831b92e311af25d605c06de9b76621fa3156ca55cc061. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEU671702993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4df97f48e2d18c89f0a2c4c305883f35546c21a7f1f2c84289f20f5e7b5cec. 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/US83Z2466902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd309563122cc289934f02816eaf60a4d0b93c8728b511f4e9f3263dbc3b48e49. 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/US83Z2466905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0258762a0642c113055f9d1ca3d43d416ca8cc27e96f0bc9657b11628a61c524. 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/DEU671701931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9494dc281f9139cb6c552356f09a94415d5f50a65b7305b73293f34599a0cb2d. 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/DEU671701766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061449789e8c8251325af4530aeea7027ab1dd62c7f79244933d878d5dc567de. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTV32511980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b1cdb12a80b4fc97f76063cc252a8944e79ad0c93a33ecb6643abc6eb05256. 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/QZTV32512177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0351d5351ac86143070ade90fc11a37c4ace7b5285f489cc398ab0dc0d1876. 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/GBKQU2526984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938e7179288437e4c5bcaf316a4eea14e1abcd10f01f4808021fb5ae8fbfaf18. 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/GBKQU2526985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcc7d9f0ccb0c380462fb710755a0b2d014d2b121a77893f0caa4a9f2486890. 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/GBKQU2526986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b1b46ed16e0ecec8968fcab54aad60f43b0da5d9ddc56ef4e911c455702198. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEWV42500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b15e75f2f1861f5bbf16af88dc431a6d6bcd152f05b288d25ad5bcda1818c1. 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/BR6RI1900009.