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 0xec0e05a30da90a1fde3a41cdfe71f8f25ae55c3e4f9ddebc61280911d0da2d1d. 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/f3e1dd35-a79e-472b-a1c9-282a9772c1c5.json and https://artists.proofprofile.net/proofs/artist/f3e1dd35-a79e-472b-a1c9-282a9772c1c5.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 0x4e5b1207ec379d70f98a6c8979af8bb5c9e1ae656f70e70e5421a9c181f5bf19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AEA2M2455895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c000234fdba919b5455f344322d0e4957346fca5ffaba8b29eee99c6d99a3a2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AEA0D2327246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ca34f028afb69ba461227511f1a7ff4e5799b6bbe1fb951520d96499ae3385. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AEA0D2327247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f8d3dbb2e86861d718f2c27febf3e4076d77c58f93ac9f5c0e7dc14e83995c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/AEA0D2327248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb5f33d910e0fceee10931eb2d74711d13a60353390fb6ce5ec305cf34d0a77. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AEA0Q2320827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a899495ede89714b839345aa297bd5018ee55c6af2a18edac006434ae523ad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AEA0Q2126362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599547de6b100f8755eb87c24e162e8e37612d97ddaa5c10c6749477a39d075a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AEA0Q2126363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1db1c4318f6d28b0576dc96ef3b9468b15a9aba8c4d81192b1f0e4c338f5447. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AEA0Q2126364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d4e22f817dac58c74bb6eeb4559eab32152590551839d23b546a9dc4781ad3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AEA0Q2126365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f811eab54f3a7de16c47be7f0fccdb71d52991b507abe050d4b775ff47705fb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AEA0Q2126366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c165798860f66705de745550e3f0cb4d1ca174ff3213fab3a17e649a6f6cf18. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AEA0D2066659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b4d632bbb271bec0d3c2b3519a62481c7e5a3072aa275f706a11a918148c69. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AEA0D2041309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e163bcec334c46ab0f0c6640564a7d11b1cbd92bd98ac1059bf5e27f9dcaa60. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AEA0D2041310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60b95f2018712cbb53f4d4127e9f481901fdf6451d55de631c85ef3f749ad68. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AEA0D2041311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2f2a4ddb8735c196fde046401a9b5065c1248d03a2ff900bb5ea376a7a40ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AEA0D2041312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dad889954f4c87c4dae29f682a0847e1d97346388f6829b0e9868ccb862945. 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/RUA0G2500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655ee813d8e50b5bd79cd02f2b93e76346a246b55236332ff004737fcef04e84. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/RUA0G2500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05421f34815f6012fcb11927c8fba574e05c8ccdc6fe6ee5ce7ae3f1e60d6307. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/RUA0G2500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd7edcf8e32eaf8e1575a9206fd70f03c6fb7413729a21d7f123372d880cea7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/RUA0G2500073.