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 0xde97bd5accada998e10f9f8315fe81e2110de9fd98e89ada95d3307ee5b23ff6. 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/e935a047-431a-496f-b107-1f240e0815fa.json and https://artists.proofprofile.net/proofs/artist/e935a047-431a-496f-b107-1f240e0815fa.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 0x17c88522190a9b8348a0855c25f66656d7a24f1329eece196c4902ccb4293b2e. 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/TCAGP2258633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ad11f6935b7f5193e59bd03d3b920ff1e2fcc4b2621b5054e5f17b60b0100e. 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/TCAGP2258711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dda760d4664714b6e6ce7f88776f50645e20eb2e9befc4b4eca01a5c63d292. 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/TCAIM2473682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e874d9c11faeb3d99bb82a4e9971f1e0d6e30e8052e78348e00edf2e7f5445. 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/TCAIM2473701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb55ee9d41d44a1ae7f4e3ebbe3fb6803a92b727ec794823de9f6ca9b01603b5. 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/TCAIM2473723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3082dc6d8c9004418a3f4e35f72bf2c70ef48fb0b938e8031827e564eb7ad5. 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/TCAIN2473627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b055642375827cb6519e2801e3d388a10aae6514cee6d0a671afa88dee54fdb. 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/TCAIM2473456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ca22c4c46c0944730ca63f1691c95fa5d5bb43466db0f83014252007e06aef. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCAIF2437061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa3fd941bd46f49c5347989548f935028707417268cc9c34d00d94b3ff7f23f. 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/TCAIF2437077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f829fc5f7ec51ebcf77ee28c36d2865881716470cd4377ec1c01188b3da17c. 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/TCAIF2437116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85884675386992416fb9fd7079edc0c394da21c8d4b5b964a19fb158167dd61. 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/TCAIF2437123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b15f793f718c87d15d537f58777d11c303979e532298d17e81a194cb585d1c. 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/TCAHL2349224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c9504410e1a13802aaf0cb653ac1ec6bb2005bf95764e2cd603a6a093a4fc7. 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/TCAFR2131471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30bb6571b4742cd83ff24e7e48f45c0f5497faa3bd8e29b0aa642861bd66c8c. 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/TCAFR2131473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284d32b8e364cca3e16984e20b4f03de8ed78d8f05066ef5fc119b500ac5931f. 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/TCAFA2042955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab5d0bd4d6fa545d86df0a1be523c8100fc7db186f43da16a1c0efc918ecab3. 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/TCAFA2042959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31863976d1ed6a2d39154c1aeccc871ee8d6df7a295cd269f97a36035037c441. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCAFA2042977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180f40fd66016c41bbe9f51dc6fb2267d186602a5a6d9a426cf0325603cd223c. 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/TCAFA2043020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623e8b8c66b78b4b42b282bdda0ff8b5aef6ed8cc3a9910b040af8a468b9833f. 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/TCAFA2042795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341e0f68ccd34c477aa5450b2ed32458c0b8e833b0abfb30cbf83429f3c0b029. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCAFA2042863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126f1377e70bbeb27a6c2d61b9149406f70db394726b729cb55734d7521fc282. 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/TCAFA2042872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fcad9c51b5091c6aa9682b1ffe5383382b5c04be43686025142cd26589275c. 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/TCAFA2042874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965e655a6b7efcb7bbf8b538d19cd49722095a3a1d7a362c92d4d2e59b1e9e5c. 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/TCAFA2042641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d69d05e5a25296c337bd718e125c6a79b8dd31ca6188ac1660869360fbb37d. 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/TCAFA2042653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59b24ab2d1edb6fe81509e50c0192d47facaa528178d5782f638e69e849515f. 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/TCAFA2042672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afa64df2bec6fe78fbf6f63754b533eed79d6cc28b377b5227bfd80c3e7358e. 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/TCAFA2042682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193ae4bf2a85f0dda4fcca6e7821d33d2e1522d949d7bc002d4d59fc1e63498e. 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/TCAFA2042708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1fb8e82856c0fbb54a58a32bc87edeb31b6ca46e235035cf687365c03f49b4. 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/TCAFA2042728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4963d15110d6fdbcfeb4c49b85641e77e41d282a99ca24a75e8f3519c6a94015. 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/TCAFA2042482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21995140227a4d0a4fc0cef90eb44d3f8f397ad0207f985b0cb4bdb956d0e0bf. 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/TCAFA2042504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89261ed1288b9174660e992dc5999af409f31158a53d28b07f4e6c1c72f44e1a. 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/TCAFA2042532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8790f1e3f0f1703c3a17875616d3511808dc8c84cbbf4a507d41867b3e25741. 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/TCAFA2042561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fc9186ed95be81765c6decdc5ec5fb662673eb26870b59c736a0734f7cfa8d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:53:49Z), 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/USJ3V1835821.