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 0xe42af31359e570eeb672807b3e284de4b828e44d9a2357d21df84c80b8677830. 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/9f7fe679-871b-440c-bdfc-1383612d0a72.json and https://artists.proofprofile.net/proofs/artist/9f7fe679-871b-440c-bdfc-1383612d0a72.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 0x7384e2b66c391e73822148fafdbf61776845dfca79291cf293b0fe762fef0c8f. 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/TCAEZ2054016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08d09a5bc57fc3ef8a18147a2c046f87c0f2853da9511049775bfd45b1543f2. 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/TCAES2088127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84ed74ea47d667450fe85b961293b347c4dbe70988c0c2ab2ecd2795c05cab2. 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/TCAEZ2054043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9526a8e83654b6baaa6385f0fdba63e89a9c1b96b9e316f51cb1cd062c0cc153. 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/TCAEZ2054038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dcb3dae8499444ed90229e76e5921d7e591a4023edeb2079c5cf9b83759cea. 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/TCAEZ2054066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3282dcb3ca9d1b4f1d7f7dad321cbb2f1d4c0ecdb0376f0aff14758ac41d2ded. 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/TCAEZ2054071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486b630da2fa742903333c6b81375364040231330191e4ea3d4f4f883874b71f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEN1961326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fc00700271bb98dcc8b7cb026cf0e788d63a7f9afe4aff23b040491bbd09ad. 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/TCAEZ2054082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcf1024e8caf72bf52c0cd4a46ea41abec9c6875a7b47bebcd40947f4348bf8. 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/TCAEZ2054086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4a109ff1d8d322db39215030f27330c57eb34132710f3ed90f44ffd6a306b8. 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/TCAEZ2054091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91376c80eb18688b49f52655d7121b5cd5876f7edc4aba20a2042c0611faeb2d. 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/QMBZ92317627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08d09a5bc57fc3ef8a18147a2c046f87c0f2853da9511049775bfd45b1543f2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAES2088127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486b630da2fa742903333c6b81375364040231330191e4ea3d4f4f883874b71f. 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/TCAEN1961326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb135282b84fc09ab437bbb1d9add3ec76965f692ce5e2e0d8bc53c94f6f876fb. 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/TCADW1885965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb287886c867fe511b990dd1a1cc32141769e71c75d4259d2f39dfa4162c888cc. 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/TCADW1885966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a4ad9504a934e473b7d99b40f37be9a1d3fa47653a5435e28c5fad2905a7d7. 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/TCADN1892184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42541660a07f0c1ba31eed56b3ead38a2d44ce9ad8424d336339ea68dc0ecc5a. 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/TCADN1892186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9486c50a2a9e43ba788e72106e8fd5441fb8127fcbc6c0c546d4d4dc6fd5d078. 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/TCADN1892188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ad5387dec1ef03e684682eedbc67ca5ec8bd52f33a276609ed0f386f2c62ac. 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/TCADN1892193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037f3183af8673ceb920825f83f33871e3be5487d64e7c194508356d09212aa5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADE1779769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2963c646e59678abec05fdfad25b7e28cd482117a418aa271a890d1c5ee862. 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/TCADA1714417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d79394193ecdbeac7f94169725f6c6eda3bdf5f808dbeb85eb02bbb8b5c5f5d. 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/TCADA1714419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797f659c3017617fd193519b6f12f0ec48c7a388576d0ea82b69b6a4e8fa2f28. 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/TCADA1714423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a23f5c71ec748a204b94beb134240bf9b5d4f39469fd405df40730138d865. 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/TCADA1714424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5a015b4f45ce8ed3b105c8aff39f497b526e50c54e0d5a49f89194b1703e47. 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/TCADA1714427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd75e9590ecb8be0fc3b27a7e5ef862701109a913cf66cf041d8abe1f4bd7ad. 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/TCADA1714428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95782a4c1fe58b567e621b0185292e4eecfb2264e37d9d044e9de0bd7daf3da6. 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/TCAFT2153389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b62b5638521a354402e740bc4d91d547cb6aaa5f71b5b930e93e31a0e3103. 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/TCAFT2153393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f9246e3c969bf28971682cc679784153312c50f6a6c40c70200e98179a5011. 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/TCAFT2198376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dd6176eb9f380688ae2db04bb2065a31e6367a96888f2335aa47032a815473. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFT2198380.