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 0xf3858cace1c566c0f2762301be229dcbf090319d5d9b259ea69d9ea2e9da0b0f. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be4202ab-323f-487d-bba5-5443fecaa2df.json and https://artists.proofprofile.net/proofs/artist/be4202ab-323f-487d-bba5-5443fecaa2df.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 0x6dbb064f5d6ec82bed4d35a01920f44be1c8d7a53c4f6e50322b8ac8d33cfc5d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZNWU2196578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96803778c068dbf692fd94060889cc83e48da3e63fc38b594de23a1644595033. 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/QZFYZ2006821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb818e65fdd6fe317a2d9994cf25a9933ac6fd5367a739409a3d3c4d4735da8fa. 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/QZES81924386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4ad4d596b95c7158378321fa8562a0aa6d442104d18ac739a9db1baa5ae015. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZES81924387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5147cfac2ed63a7203f5682e8fbf879d63796616fd6d8deb645d9e3d3cedf2c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZES81924388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d66ebe4dd3f92a403d9ee9b32ea499f7870440ce459ff52bd3b026646a562a. 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/QZES81924389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cb6f875e1270c58e703338e8802e8be07074f7255730bec0be4aecc8b7c2dc. 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/QZES81924390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cb2b60e657e254acaea1a0ac38103e92b11188317863a3f38b1918d8dfc6b7. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZES81924392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f32828f1df4175228fc84f763bc25c9b1f0299ee777fded520622664738d5a. 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/QZES51895979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2780f7934cef7a4108ac58f88fa82b0877f4d026b21e52c01bc380a18d3e9fc. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USQY51713520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831f05b7ba6c8166e9c734e22366584a98ce9a570118964ab50b59e6848cda57. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USQY51713521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf2eadd4e362a9032a6c6a89e02a91f532d9b73e836f3c9ecab0bba65f25053. 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/USQY51713524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6d0812bbe54a161d01c673dca528dafdd6a4e04d1c3433738b03b5b497fe00. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USQY51713525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b6dc4637dbe44a6205dd40e7aeb84f550da212554c79bc0fc96b3f52423502. 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/QZES51895684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5907d396c588e3d8515df93009c307b6c5b2471669b6d0260b436427886d27. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZES51895686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406b870a022bb89bd7ad58ca7a059f91787fe8f7701af360ec95df0414ef7614. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZES51895688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d670c1039384a2cc2645dc49258be90f00daa5d6d8ab6849c4b08ade9ceac1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZES51895691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a6a2442a25ec9633481f17723d99869334b2f454f5242f79b97d31271cf54e. 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/SE6HN2385155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4515397fe1540d72ae2b30f54013340530a221163b662335159bd5d74f41a7ae. 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/GBRKQ2252155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b66856329d22f3d5cfba3b3e2d2ccc156cc349d8850d83236279e5ea5e6ed17. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DKZVA1661058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828e46ff4c3a958ded900ff3bda019d01f066bbfe8eefb308529f044f38c0e30. 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/USA2P1827202.