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 0xccb6788d0e40ee229c09e48ced622ad50466c94934a4a3af0f073480a8a30b7b. 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/d81caa2c-fbf3-4560-9b7f-a19156c745b5.json and https://artists.proofprofile.net/proofs/artist/d81caa2c-fbf3-4560-9b7f-a19156c745b5.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 0x30863c4fbdcc78c7f66cf21ca146f6b1202d60770f5a64feb241dad197e48653. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRX621756060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ca23321ecfbc5826de2e81d4280e75b59b64e923212380a58f8c2d3794875c. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/FRX621756110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc51cb911427df584e639aca22b239faef85894c7c9f3816dbd10831562a28e1. 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/FRX621756020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8763fa711aa641ab47d6ff961206a3faa93ce82ee323591c637fc43ead575f84. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRX621756030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cb71a41d6b5f1e693ba688f811e980343d0261f5439cae359d6244bfaaf795. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/FRX621756050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680c52a7e23bdbfcefd0c81f7e66dbaba770e2b7ee0728dd513e2c12e72bbc43. 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/FRX621756080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ee88d08fddea2e793c0b741be75591d17a0554431f8d9cdcec3ab5670476cf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:08:39Z), 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/FRX622138010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630e1798732a435063417c5587f91c186a44a31bf5a49ed17e8a606c18bda908. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/FRX622252010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35372d9d90ece7a85ec83121744ed4a9255acfe773215d3100efeb7940bbb30. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/FRX622252040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3a494d46c884d559f27fbc8f17c3d8bfe81908051ef896f2407496afa2cfbc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FRX622252060.
Nhó Jom Seá Mi No/ Ta Pinga Txápu - Txápu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb82224fa9b9c287a7e15c70f0cc55f9d4c34427ebbdb82f8c4fbec648a6a478. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FRX622438010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdf35b13481852493bde41313cf1e07dae394c66c27e9a04abb19058984ac31. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FRX622438020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6791631c3946bd07554ff0dd70c08a9228138b6213dd927229ecb369464f10. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FRX622438030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7333ea52605f60ebbe9a4e9d9f3bb52d7557ad79b0d073b2f03578f7f7a5df2f. 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/FRX622438040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985e7005be448b4a2fbf6c224fbc5b35ebb0500cf9cc89fed5482527d00b4518. 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/FRX622438060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212cc725d606480914ef4c608626ce976bce62fc7dc3382e3b9c16e4f0c9a3fe. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:49:56Z), 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/FRX622438070.