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 0xda4c5ed99937efb2ae0d10a3b3a781c0aad294980d4626931695806980068049. 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/776a4b5a-e7f1-4eea-80e0-6b8be0269912.json and https://artists.proofprofile.net/proofs/artist/776a4b5a-e7f1-4eea-80e0-6b8be0269912.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 0x810e11055531fe4b44f3b50d8b69a1a75890364d9bd66a85c1158c7d509fdb1f. 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/BCC7P2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe80f369ef22fe9d06fa0db302d3de7fa69382f4fbb9389594faebf3ab5e49f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHZ52142097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f146702a2d5009317513ef0dd2d2eef694f3239becbd752bc52e2856caf4d7c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZHZ52142098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda34b29d6d1ba1558d3ab715be247fab323735b54a88f82a71f5bf313b28103. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHZ52142099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8fdbea76f822fe82cf89bd21b15006a5eee3d6b7c07b074b3eda083957d30c. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QZHZ52142100.
O Cara Errado / Amores Imortais - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2892bb1d3a8c0c2b94c7bcf8ef0f1cda9d24eaa0a70e910cdc805e6d3ae8c383. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BXBAL2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c944ffa183054c3b8d4be10e65daee1ec21868b08ee54e8297446d87cc987a. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZW9L2318386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b640e19eded6b52300769c8a77a9b4944fd87e9b44a9f73ab243a383b90f8c. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZW9L2318387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe77354368350fd1bd22b3033cf6394e7fa98400431754d31842be45a825429. 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/QZW9L2318388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fd17444fbc8bb0de7509f828ab8762abd7e16389fd2c6cfd753e7db3f9c149. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/US7VG2474779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6e0d5e44ca9b9407b4edb097a67b8a8907649e566fe5503fc652d1fef239f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US7VG2474780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31601eefcb03d857360dedf93f2a6af43b82395b43ff4093114cd75201ba8b3. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/BK0DR2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df4dcb42d396206e07ae3c3cea96a7cf61fc260d7a1b856503239326a6b9815. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BK0DR2400023.
Na Hora H / Por Um Gole A Mais / Me Apaixonei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1979d5d1ab1cb782ebc1db9d466b7d3d6baa4a6e94f4eab301e1224bb410caa2. 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/BK0DR2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ff0e798791507504b0c156f0e6603c52e4989a9fb72fd16c278f5d395179c7. 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/BK0DR2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4557073014b5daf3e07f9fe4cb75e90f76b41b043894c8aa4ffd4690a3b133b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/BK0DR2500024.
Não Tem Dia, Não Tem Hora / Por Te Amar Assim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c2981f4d9ba7c72eee6bf98224246eaaf970bf828d7e705f4dab4cc06f23e0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/BK0DR2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb40a883947db085729aac52c4a74893bb414e0b414dad9893f6b40401aefc9a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/BK0DR2500026.