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 0x83cbf0d82c97180c8ed1c2f29bccc94a64f147c111b335f60d7664b8dd70a44a. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/761ce26e-08bc-41a4-8a9d-4840bebe8219.json and https://artists.proofprofile.net/proofs/artist/761ce26e-08bc-41a4-8a9d-4840bebe8219.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Saudade da Manhā // Like Someone in Love
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 0xa48d26ba49d79b1abe70b50225147d63d1359893bd048698e23b1a0b12431388. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZFZ32445338.
Missing things // My Favorite ThingsMissing things // My Favorite Things
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62299df271838ff823f063ea0bc444871de91c7ac6e27aa8afb0823af3dc97e3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFZ32445340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f146d4140ccf7add136978625ebbd61bb4ba88265e906dd3b52f5cd2556ae9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTB72489146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4173392e42449a157b3b09cb9fd47350f92f90cb18ca1c9bf238f67d1909a769. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB72489147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ba2c56d2aac739d62bc3ee526d0bccd811865338cac576ce05f14b5171566. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTB72489148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92ec5ae18a51390bc5b82d024cf20aa4a1a72e6c810a522b7813459fb450ca8. 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/QZTB72489149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1bd0091558809a970ad7252102b444cc1a9897e7ab5bd6457c9907334fd8ce. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZTB72489150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e5b0d853c946b1adb6a346133a3cc9fc061126aa5854c2297fc8400b893cda. 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/QZTB72489151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c24b010475f8f14dad6cac727ee7202c8ec6752b009bd6ce2722852882e34f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:26:46Z), 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/QZTB72489152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f146d4140ccf7add136978625ebbd61bb4ba88265e906dd3b52f5cd2556ae9. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:09:26Z), 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/QZTB72489146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4173392e42449a157b3b09cb9fd47350f92f90cb18ca1c9bf238f67d1909a769. 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/QZTB72489147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ba2c56d2aac739d62bc3ee526d0bccd811865338cac576ce05f14b5171566. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:24:36Z), 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/QZTB72489148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92ec5ae18a51390bc5b82d024cf20aa4a1a72e6c810a522b7813459fb450ca8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB72489149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1bd0091558809a970ad7252102b444cc1a9897e7ab5bd6457c9907334fd8ce. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB72489150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e5b0d853c946b1adb6a346133a3cc9fc061126aa5854c2297fc8400b893cda. 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/QZTB72489151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c24b010475f8f14dad6cac727ee7202c8ec6752b009bd6ce2722852882e34f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:36:35Z), 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/QZTB72489152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0d4b5d6ed0408e5bcbc061f745fda21fbcea34035bbb880b99e72ef47c64c9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/DEH742500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc955a4786766227f99d9d269b4454823a531ad4e8d752d7713a3af86521e439c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEH742502950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3211e4332c42def7d34e6637475790310086ff16c1a63c4d6805fd6f9cdfe931. 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/DEH742442473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c963a05e9fa4b903c5e7fccb087b5b62900215f805c5029681354f7dbadb04. 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/DEH742503158.