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 0xa39bd5d7e53a7b5c6ffc47c45aca63499751d177de81f4ec2eb04ca889c03d39. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ca44f98-1cde-4bfb-abfe-2dcb3fbdf682.json and https://artists.proofprofile.net/proofs/artist/8ca44f98-1cde-4bfb-abfe-2dcb3fbdf682.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 0xd7b9ab054154e8ee3bfb27662f69788ae64b2cb4f3da0ef6426ad9e9481d017c. 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/QZ5AB2397956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe8ecf4c00dd70da81731881e5191f4b522d06d928c2e804c61d5769fd2ed14. 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/QZ5AB2397957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8aa2d86fe7ff96e9110a3bb047d79b641729b4e3e1c770d4f8d203ef739fe3. 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/QZ5AB2397959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3d719cc4a6d9af85a9b74e647ef811dda80674c308e617bb74507089c7b96c. 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/QZ5AB2397960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cb1ec9e8a18cc3c8cf496dd463ca600bd0595be5011e297bc750a32a88fdd0. 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/QZ5AB2397963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6bb798370687683340c083a2a33a24906c273ef925eb79a99082cabb323bb0. 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/QZ5AB2397964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2155b3cf2dc6c711ee5a1d4e0fab526fbb0bb8dd8a8a1660930b3cd76867d27. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T16:15:34Z), 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/QZ5AB2397967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa06d499d19da2c809821fc9483068ebf0c4a6554bf9c19de0ddba8d368c5dd9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZ5AB2397968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e4678650de81a064737941ba2e3f114bc23d53e7615d54e65796d56a148d10. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZ5AB2397958.
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 0x7a134ed5de212022e1f6a59f62c6aa9a419d822af05376d2199765d382459f4f. 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/QZES61888541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916d84f782e9551619dd20f3b04f2bf808c0b9c46d28912ca03a252e10e97a42. 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/QZHZ41978267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c623120ffaefb325deb197c9365b76f921ba8a39b0123473464c1faf74be289. 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/QZHZ41978268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef0c00311aa5b22cf6e11cc7aa7009571d4f4a40279a7a7a8d68a43cf381016. 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/QZHZ41978270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf66d753f67c9dd974119efb1b3da0edb04d4d27038643aee97527dcd3e407e. 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/QZHZ41978272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194dc7941a466d5c11acaeb508d99001aa285b96cd0d0f3d9c5d1c654caad07e. 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/QZHZ41978277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e193165ecc96bab2db26090a3914217fa290a2cf1aa3f8a7a9c846bcc873b7a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZHZ41978273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdf051f62cff162d10aad2c83bb278339f7ecf4db78b843b30018ab303c0b4e. 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/ES71G2124996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8764d08a6abb6e3ac3c6a51cc24b526c6cb6c33f5ea45e1700d60278d7703ab9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2124999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc39b4dc8c6587c6a7ac69beee61ed42c44ec5f4408367d5151f5fe433f342c. 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/QZHZ62120903.