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 0x56b45b99500cee08bc09bd29a8ea98462b9e3ca35f4abb66a3159415f2374ec3. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e230232a-e8af-4e8b-b525-7f46078e3ff9.json and https://artists.proofprofile.net/proofs/artist/e230232a-e8af-4e8b-b525-7f46078e3ff9.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 0xc9a0230f0b6ae6d2034f256431167ed5c10f9c18dc5467e632ce89b4c926af84. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TRBIR2201453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6167fde985df4d861aeecad8d9d5067486ec58df8362aabd0ba46cc32fa979. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TRBIR2201454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f784de11ec682fbb5790d991a46175278ec6ce65110df1924a7ba92c76ecd5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TRBIR2201456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371eeef3e4d4b6c41b1e5a02ff32253fef7c84e74b8a4c81b0245abb1d6ba54f. 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/TRBIR2201457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166ecef097f83419c20f60093b13dfd5a83b32e68aa90811028c7e702725c545. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TRBIR2301592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537d1fbce39d3c5c2dc774359208193d0dc07e9808031e60279bb194221d8e32. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TRBIR2301637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6277868b6bd348c3da6150598830c8dc1b34a1bdc9e167cf1cfc412c99d5dd0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TRBIR2301681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e8154a8b1d51ea31f87e4597ab5dedc7654951e5ad33cd369b61912f4f7a0b. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/TRBIR2301749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2e36e326c1054201dc713bd297e27b926c76a90c1868bb13b2ff5abd728e23. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TRBIR2301751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d787285969e182b42ee46f92df1c5ad76e409f80aa89f9f5e03d2ec1ac4a7e0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TRBIR2301796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ca5c230a2bda222e80afb32e6ac14366685f19c7f62529f5d7a39f3c32872a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TRBIR2301870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9606e71dcdb06f89c8d15af134a95222ca6526bed6e581994d45d2c637428a06. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TRBIR2301871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fba4ae24d9cf0728da4ee618273e315a4af32c967fd74311ef154249b8ba854. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TRBIR2301872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8074de056ed5419888037181948fabe5439293dabe9b4a17bfb2a88c1279e3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TRBIR2301869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1adbe93c267083beb7b0b6f20af91da00649444eace1830d5b1319de4e85c62. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TRBIR2301924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5421c478c88fc37f2fc0000549b815065e651f8899e969e9ec0df177fd5c2d49. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TRBIR2401953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc390f9d45617e6adfc9e0090b2a84263a3c0ef103925071143e4a8020312dea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TRBIR2502585.