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 0xe76d55f319dfd98aec40abd53fd453beb9c3d58d67f676a3d158b76ba3fd8e93. 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/41201c42-f239-4f2c-90ab-add69927750a.json and https://artists.proofprofile.net/proofs/artist/41201c42-f239-4f2c-90ab-add69927750a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nossa Voz (A Mão Que Bate o Tambor É Feminina)
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 0x6ef67480663a8fd04bb1f50280082ac95ca4601174c6cc26a8bf735c2446fc6a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BC0C52200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b55404f40a5829bec0d832404f263b86ceddea2d005ee3e2a00e23d0838b8a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BC0C52100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826b4c5bbeb4ade09e1be417a8a812b54bf18187b3110216315cbf45c35b1f80. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/BC0C52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396a06b7c9655b945d3dd0b0627c2bbebf7878099340f87366a695a1c140fa14. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BC0C52200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48d088e84c508f246be1af1450646df4cb38e270efd9f0949cc8c2b8a98e2c4. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/BC0C52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe1016f768241ae47d064229c80053cf739e9c30a6f1bd5b01c4ab4968e02cd. 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/BRAGL1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d04a8e1461bcfe5c129a09a52a986485a73e6b9e3c50a9d02be44c49ccb6d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXI7T1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f824736d4b5c016648bbd8d42224857ffc8b9835bcad95cdb1b086273ef14ee. 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/BCAMN2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8189a3194c4f2daa8636b3c528be09b17cbc65c6a085bb7d5131b1d43d0cd950. 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/BCAMN2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b339921916444adc7e65f8d50350d57019726bb1b70c0d27d7b19582bd49b6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCAMN2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afaf1bd9e50fe1dcb1971fe4c0c64dcf583346d7a0dd77c6cfbf98d1dd1fa92. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BCAMN2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd843395103302b3667c03c811f55d2c394b8213cf3e10f1e3e006dcc45d3b3. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BCAMN2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e22a8e4f480ddfff7cfe2c3121400bc322224dd7e30559a319c69ae3a4ac16. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCAMN2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ddb020068317e92b648e1df5f8de39f9cca8a5a0c9d175ca67f3c383c6e993. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BCAMN2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5960b419e9dcb65ee5e85befe9505921ae472abbc4022bb906ee0a760d21a37c. 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/BCAMN2000011.