Sweetnotes is a Filipino musical/cover duo from General Santos, Philippines, composed of married couple Jeffrey Bactong Jr. and Charlotte Mae Bactong. They became known locally during the COVID-19 pan
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 0xb0a96c15b460c8f1a9de87a34dd4efea73c5149a52e6be13e161f84e66649b31. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3807f199-052e-4a02-84ee-74000eb4560a.json and https://artists.proofprofile.net/proofs/artist/3807f199-052e-4a02-84ee-74000eb4560a.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 0x342bfe939aa163be882f7df8c7af91e59f131de54b2754ce1e5e18955ebf1087. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QM22L2412110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11ee02daa6e76fb8812835cf79e5badf1757464f72485d4dc5a5a1045c78ce9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM22L2412114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad9244889b109001fbf372c31b16aeadb3ec7ba0f87d54dd50fe8a4da878068. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QM22L2412117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd033fd6c1b4b9cb8ddcf864111c75ca598fdc2424c7d11335da6df3f09990e60. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QM22L2412118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af276ea70ec383a77c5613f20068bdc2a0ec33c40e4d2a587bc21af1da0dc7e. 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/QM22L2412121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1089bc1a3204bb824811a1065a52f6aa138dea0aa09f4c037787defe452d91. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM22L2412130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8770b84355ae00829c8dd567759ad52bde5aefd5576f977a0af20d0795459b96. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM22L2412131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f180074765228d23990fa8e63f1add96e5e006144cc4d2877f89501a20f7282. 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/QM22L2412138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8850e5521e0a407fd2cefaf674a4ed582888f6b7ffe0ebc3406ddbc96918b7af. 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/QM22L2412141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9de0f7694590ee052ecaf2367b2c205fd62bcac2fcfb6de64a9f3282cf868ba. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM22L2412156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29995bde9b535cbd8a54c338c85d13d4cc4daa4fa1fda1ed2b0c9c8e8cf93c80. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QM22L2412161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4e1024b286189d33271a7993321f604961f19f69259e204999df5e79aef10f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QM22L2412167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8488dcb2bab98ca05ea2ed2c8de8eac5ed2b61d7c4c89a30bcaa43eac865336a. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QM22L2412143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f920ed21e737fe4c6680f06b4959c8ae1979c096c4251200c6f76e4ec80a83. 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/QM22L2412144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd8f31d0f632199b9ad3b43391d96bcee63a356ef286453cbf7b8b50bbc1a0d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM22L2412145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ed0746da887e65ab9a65faadd6bb0063cd26d353cc3ef78e1cc4a3abffb97d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM22L2412146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3acf68964ebc4cfaa0b6415019a7713cbb0ab975d2f7d3b9d108f99f28a4671. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM22L2412147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e1fbadd1dd70d4da33f8ab9216cd95aed26a0adb0391c76a16f5fb979a32ad. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM22L2412148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0430c1359af800be4dbac2058774d09fcab815162bea80a50fc677958b0433c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QM22L2412149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65739b0db8ed3c525d49ac3c3926a2094dab4ded3bcdd9c244032a4314a5dbef. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QM22L2412151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9de0331e9f39644bd03eee05c880c375e35df4e0bccb828b7750155206ab70a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM22L2412152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6181dbf026946c747cd4417165933e92d11c47985012c244bddc3a6ba6d0bdb9. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/QM22L2412153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42519061593744257316680fc9e11a847903bae595055b3ce1aa9365884a4a4e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM22L2412154.