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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1048c43520206e2e9f50081bd6f4c80cf6e024adad97f443b9da8a032dccf553. 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/9c0439c6-b818-4310-ab25-e3ab1c9d44c0.json and https://artists.proofprofile.net/proofs/artist/9c0439c6-b818-4310-ab25-e3ab1c9d44c0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed45504fc15801f5c1751417ab7fee78f344e9f219a030a4c606092b93ee3fe8. 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/DEA622304021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32eac48ec47b0ea2e999d6c3aefdc2c2f3198aa4fc8d2cc5465d95d99ca2a74. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL2QC2101274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d7c215715db777b08855b693535aabb76f951a5f74972e9ae6fe1e76f141a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAQOI2302659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3319b75e5b924aa1292bc78716571581814c12aacab6c22b5e772ff741411d80. 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/NLT2H2300389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ada87f5f4320b2c76043d5daefa2d1a012dca90235f0da6d20c5544cd1556ae. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GX8LD2354549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7955931f8f048a1876bb32b706081db54d9eebb695cb827afeeb589832e23c9a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL2QC2101018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441f1c01fe99c3a44cc2ddde7a14edccb1b3a99d02bcb962c810171878f8f717. 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/GX89G2368953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc746dd696bcb8da4197b77ac90c0fcf5f10e943d965b671e83065803bbf3a9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAQOI2300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff19fbaaabc97450102d40ee9b9a1f6b6eea6ea9586b8a2bc3b19f3fc8e6d68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL2QC2101355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806cf1e400cdce5733c320a730a826ca1e2ab4896187008126f36e6b073ab663. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL6WK2400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987be9a2f808afc47d9a3d49bdd4d34a8086b28e13ed402940b31d0e2499c082. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7238f994f81192d3d6324566fae8c41500adef3a47061a4f58565dd8f6aaf796. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEPI82504645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8efaa8162b4dd5b999663d3b33e86669ffdec3f778733b6d52364f1a5c203c. 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/NL1ZN2403239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a385300972700dbe1bfb42424b000f8c4c925fb317b063a2927175ac9d9d6bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL2QC2101562.