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 0x3fe3923adb212af5a93b1f276feef6bff20243f3bdb39e7261ff32646635e884. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/033cc295-6d47-4912-a6a7-aebb23936e50.json and https://artists.proofprofile.net/proofs/artist/033cc295-6d47-4912-a6a7-aebb23936e50.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 0x6b2fa40e5143c0fbacd226176e7d6632c5628961a732e82e309669a1be822800. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QMDA71312530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a14f6833c2e0efda0e3eb6b762bb1ad59e0687bcab95b73a2f3480ae1e2f106. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMDA71312531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f3b0b795e235a9eab55728e68934e3333ebfb75c0fab53ce501aa2a999524. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QMDA71312532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cc3bd9937b99dab9c1d3107edde49e5c55d1a1ce1cb41705898d9f5af355a0. 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/QMDA71312533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d42aa41b89521e9ab97dced57d9281a2f86a1cf904aeb46b29e3b77fed6e53. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QMDA71312534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51dc70e3b217a0e92528ec282ec39fc5454c6eb7d85fd4f79a86528725938d1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QMDA71312535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895cd86c555505f5397f61fdfceb947a4868f3c3eb080f58e286dc61275f1d20. 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/QMDA71312536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479160e4ef09f11db67737a766261eb25c204f3a7e3f85df856cce50509c4cc3. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QMDA71312537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3249f1736a84bf2f6cd7bd4a7215f07fe5e4ebb4827494d6c0ac16522cdb732f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QMDA71312538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dc389c7e3fc5aeb5597e9c77755efe48a72ad5c1de5ff18e6a14f4361cc5af. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMDA71312539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa515bccfe9fc69a047265cb66c6b4e58eda245ba9ca3b58c9a396975f0c2155a. 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/QMDA71312548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9b95251471deb0d7c87b9dc348dbfc1c0abbc34bc0d9ff32b4461201210a0c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QMDA71312551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215edc82011f2230ebf187674fe62480ae4f3b9d96231f664241776688497479. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMDA71312520.
Acustico No Cultura Rock Club, Maio/2009 (Ao Vivo)