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 0x86d0a7cf1b796cc038c59388b797ea1b5754591d2b0f1dbe102b3cd4e99ea3ee. 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/3db827e4-72b9-4ec2-8f9f-7a8cf2fde910.json and https://artists.proofprofile.net/proofs/artist/3db827e4-72b9-4ec2-8f9f-7a8cf2fde910.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 0x8140faf4c6f3ed6137f3c6a51a2a0e90bba9f8e490a41988a5e75830dd64caea. 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/GB8KE2207624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a9db58906f307147bf65233d3ac5a66ccb5fd2b04acbc83c70c0832fb59d64. 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/GB8KE2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80309f1f641309c767177ec82d6282b65db708dd0fb4fcd569836414b966a7c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB8KE2410428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f23731c4f58ca3066295fcc9f690a47a90920b34a3a393f0b144a0cda5a89c1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB8KE2408406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e9efa1ba2d642c939911bd552ae8e02be274a0129a9c499094f7445407bde9. 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/GB8KE2405549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa66341ceb107b5335a319dce028f9f0548e9f4755d50797c1b57b60ae146d9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB8KE2405550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e84520425289ff4ec2b069e853f1e43dc37951264b2b5248909916fa32232f. 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/GB8KE2405552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae31f91af5480a49df908b2f609ce1e2e243511733c9ac9dace8fc70d20fe21. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB8KE2405551.
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 0x5cf877d9a86a49e726af73eb19977950d82277b802ec4315e4f081fafdf453a5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX872370031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d8163c5db4ef34398cd10bf82d76d62df0903cf11889cd8d0f7c21d241ff47. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSJN1301556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee632b95513ca4241dbb5b1ca06aa66724624517c74f93536a5e3fcb9ebe71f7. 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/GB8KE2300878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9ba94ecdac0983f4cab8cdf5471712bbf71733b0515500ef6535a97060bc9. 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/GB8KE2300879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1183bf37eef06a3e5ec336e4f630577e7aa8732f843c6aca3e3e1a422c03e32. 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/NLCK42222637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8f4b92437456401a950d94bb2cb7a045b249f7751c7ff186fea7e710225303. 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/NLCK42222638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efceaef63c377894e91c539ebf2f527f7c5fb8c62e3ff44b5628cfc56ac824d. 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/NLCK42222639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abdba50edf526737ff29bd75a27fdce699a16b91828d954311d3df5ee94ec76. 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/NLCK42222640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6a72d2df990ae0df9f8e0db7133317d3901b5425bb0483fc3e2bff02ba7878. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK42219650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431e51dae9f9182fa2776f3c2c04dec6e3138e8734ca9637b26f34e4b569edd9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB8KE2201133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc669eb87496d3de8900afff56c022390b8fd946951ff31dff5f7ab1323cc9ff. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GB8KE2201136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b8262be57dc083c8000590f0dbc49e14c88c7c70a436731ac027b298970b30. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB8KE2054614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b4e4e49399af658f9cef37b512902b50bbf0b85a9e7bda79125f66c97ce893. 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/GB8KE2054615.