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 0x28d6bb485d777c49e1ce3d436d12cc487dbba2075886b09f60d38ab0fe864d20. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b3c03e4-2ef1-4b58-82f4-df7d9884d55f.json and https://artists.proofprofile.net/proofs/artist/8b3c03e4-2ef1-4b58-82f4-df7d9884d55f.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 0x3dcd26cc683db92af07d87ef754f7f91cc61e1ef1cc55c3a8aecc2432d6ee9dc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARG601010163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75996c4bfc2dd7e030cede6e526907392aa5234ed07533c6942b0aa33f2516b6. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:25Z), 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/ARG601010164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c64ba11a4e57bd5f394fffdb77adf95eb993f657052c77deddb5ad0e269fa6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARG601010167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfab47a5a4c695f0e80f3f8b665a164e32aada1526730ccbcd46e9bc15b39e6. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:50:04Z), 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/ARG601010169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59a56212fbe359735723f21e4505528b4be1e26a3ff5387d9385d54020e794c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM21905778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c59ed1d969b595288d93637b2e65eda7cf009b8ee7dbf27e4e3b85279aa7c1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:05Z), 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/USHM21905779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb634b69c3ccfac55fd39b611da28c3bab7bfce38b8eddfb61af27fba8df644a8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:11Z), 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/USHM81930351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c886de4eb7fc0c5adb6cec275574c3a32619f90378b01aff69eb7af20746a8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM81930362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee2f145e553060e3ffa198ad410f0c6d8870b53a98325473cdc2368bda0bcf3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USCGH2580338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c288a990c238e71e75066f75530b94c249b9e8f27427f1e595bf1506b5be5dd. 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/DEN960530604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffcf951825eca78b71c8b44c6c7762ab0d8bb5656cb90e9394601af8f9de55d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADZ1850725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497e8f0b8f573d902744d18b0c3804aea65c0312c807f32a6ad5e11bd50a930b. 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/ES71G1608478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e24a40e3ea5701ad81ca0e0a0265fe79b424ae62d10862e99fde8cbc22042cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ART720510464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8588d67d8a60ea913ba44142b3effa20f788067996c155f106559feef5a18738. 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/ARG601013018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d6bd9997a89bf96475a2db47f02f1ff608b36231a790f4c0233139c9e6e6fe. 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/ARG601013019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d5f9c01256eb32c3b5faac8258fcfb9ac9d7b17906500879cc7e20801ce90d. 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/ARG601013022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e12d06bd357129b955bc48ed15d6c269a32d2c5a6c3027c5dfd0462185e9570. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARG601013024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07939ec04bf92d6c67a248e367f00f0fa11ed2041a40d3b2ffc75aff33f103fa. 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/ARG601013026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4421dc3a6250218a12dda2bd1eec2dec9cd40155b60ff169ca7e886fa305ed31. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ART720510451.
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 0x594ab01b2887f5dcc6d063c61531d207bb1bf4d1bf0464d96e279581443b375c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ART720510462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a4cd1760ba4a68161a8fc95328abf72ce368d9ef3641bb3e459023c2602dde. 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/ART720510463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e6d0c5f817b756764a7127fcfb30ea11b056660d55e892a4a854c4c0069ed. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ARG601013020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0893b9b0717be5c1565599539dead7e8f23589d8ffde16afe34340ad380a35c2. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ARG601013021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32fb174a3d8030cd49bf8aad5ea621d9fc72bc4fce8173313fd379c391c683b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARG601013023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4894256082412e3f94ebe633fdb1bfc9237efdc63050e356211b8eec548ba7f6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ARG601013025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b83d87d2e59c487609c369a890043785163feb1d7385da9dce714dc2d325cd5. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ARG601013027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdc6031559aea914a1a9566b6bde34f1c7af8a0430e9118dabc181cfb05fdfb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ARG601013028.