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 0xc3b0ed6d3b1f2c690b57176793370ade51a09f121ec50f78398b6f6f7730182f. 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/48e21fcc-5933-47b2-929a-883ae6a9d156.json and https://artists.proofprofile.net/proofs/artist/48e21fcc-5933-47b2-929a-883ae6a9d156.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 0xc943072d67c330fdba786908fe6c71b4b5c470f0e4e87168747b79b1c115e538. 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/BRBKP1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf8fae1d398139d68b78bac11ca6d0efb167a0c1db06a4ab8e289e09551d89f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/BRBKP1400009.
15 de Março (Ao Vivo no Estúdio MangoLab)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991b5623400eb42fa784c745fc87966cf94f91ddae048e1dddbd5fa227979b52. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/BRTCD2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc245c3243feffeec926f2a6d628c96710e896f8b85a77c462e7eb58499948305. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BRDEP2200473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf720d0eb5f0726f3acad2c1b92e0eb5dcebba5d70897c64ce7ddb9cd9f0511da. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRDEP2300545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0be0df6d1baa22ef4e7b9958e3f506f41c42bf7b39bf68c9942e5d54ac27d7. 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/BRIKQ1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2501d7240bee1845eaf94a0c8e7a31ab689e1ff2b16738fee9ad84d856b3c0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCXQQ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06f0e9072197a36714ce7aea5efe4554ba4182d5fa9d1fddfa3df5ed7709351. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BXGTT2000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44214821bd9a45bcaa107b5a8aee49e1554e5b5e4a528b36ce6f37c713a6bc4. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BXR1F1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2378428997b0dd4466990ab2889f309c5c472e690121f77ce82c583db6af845f. 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/BRPY82100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2378428997b0dd4466990ab2889f309c5c472e690121f77ce82c583db6af845f. 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/BRPY82100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8536bf0eae78ad9c62fd656892c976174119c2ef7609baf7da1630411647a7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BRTCD2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2062fc9dfaa54958ea33de3b35245d84b25353949831c6c0de406f7489dc40d2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCTGE2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0049b384b25034424820a4145d3445c8d669cb9e81892d60cad43f7f7add356f. 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/BRDEP2100086.