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 0x87ccd0ff60f65dcb4a51c623a6562e9d1dd93c489ec3e541746c41e31c421e73. 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/4fdf87ea-64d8-43ac-9fe3-fe7f06482e82.json and https://artists.proofprofile.net/proofs/artist/4fdf87ea-64d8-43ac-9fe3-fe7f06482e82.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 0xe24ffb72246205374d27461e5686bd566560f4d9fc495387b026ac83c4bd946d. 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/US3DF2163597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbdd47c17641b2cc992748473d595a0fb43ab987e9da0b3f99e847c9a58d2d7. 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/US3DF2163596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0880caf45387ea482a17b1c018ba8554192f585dafea821925aebe3c429a2000. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2163594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb019e71659b81ce685368b2b061baf0c3d40596a26183ff13ed1b6a1ba5d25c. 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/US3DF2163593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18780672bdd9881fe48a176a53d7dacaa454e29f9ef5c69365ebe5c135655ec. 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/US3DF2163592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c62fa9b182bc727bbc20ff410dc46ee4256defe693bd482b66b37d4a6b3d31. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US3DF2163599.
Dance Comercial 14 Mc Maha - Harry Porra e a Bruxinha Rabuda (Rivaldo Project)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea29bfd29dc1ade592d9e1a9a3aab2d032de8d7928e5a92cbbe6be25c055d14. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/US3DF2163587.
Dance Comercial 16 Zé Neto e Cristiano - LARGADO ÀS TRAÇAS Remix ((AlonsoBritto))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020fe3903d575ebefc6baf6c7f7622a8606d139b6195c34d775c3a086bcb333d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/US3DF2163585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4349a4c595321584a1894936c69d3c489c340fa191dbaa72d45602edd11ef7. 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/QM3DF2171745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d20e80f7dc707286561aa4dfc165989f21dcea7a8f0b1db70b3a26746f86853. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QM3DF2171744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41227a5a87ac67a9bef0be137147b7a2a7f18c4a9d75fb7bbe74b7c68c8c1458. 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/QM3DF2171743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1a8b9bc27c8cd15ffccae3fe0d7793e59a35a9e5f629124040a1b467f8e4f4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM3DF2171742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff4f93cbc89c3ee2e53033908fed1c2ee876cfe672971361062f813796de23a. 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/QM3DF2171741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83953da2e835e242f32fcf5e73f0361a1358d76aa8682c1ec3126b0886e78e90. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM3DF2171740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca678b7a5063c2cfaf800b07b8e8bfe70f1d17b0a36badaf6f54dbbdd513827. 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/QM3DF2171738.
Dance Comercial 17 - Joga o Dedinho Pro Alto - Ntts
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4349a4c595321584a1894936c69d3c489c340fa191dbaa72d45602edd11ef7. 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/QM3DF2171745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545573cc6c4cf3c135c4923362ae7cd283cec0b4a4150678d29bf4adadd5b695. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/NLRD52251101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab60d249d3a9ea4ae9b400ac422301fcb29c50cbe1a5441057150da71a2738. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/NLRD52220156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bcea06480edd6322ae682046cd37816166bab6ef35ac9e9163000b826558ba. 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/NLRD52252464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f67221c79f24b858ef446a3effcb625a860ba17e0690b3bd71756f65833f3b. 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/NLRD52252462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adbc90fcd11711bdd26c2c2e750187d834f5bf5d94d6243898101e3100e4bd7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NLRD52252457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7a7d695c308bdaf613c5c2000cff530b495c8dd5d2dd8abfee8f3f9b81e6bc. 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/BX4IU2409141.