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 0xd8bc748c2d2180e775e2f4b23a8ee894894c2f1e328181bcb45cf213a987d7a5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acfae938-7982-4e4b-b980-f5a9833502dc.json and https://artists.proofprofile.net/proofs/artist/acfae938-7982-4e4b-b980-f5a9833502dc.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 0xfc102105d8461fe08d67fb818607c13f7984c865410398f11508cc66968d4473. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/CAENV1918340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e4ecfb0b248ffb069362d55c34642b22e8496d7aedefd45e09cfb7428e0b1b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:37:49Z), 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/CAENV1918344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f4a7e38b40d47dd48272868e2c8c44f6179e4eb1a7f2ab838ec57ec24134e0. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/CAENV1918347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e77c8a90719fe031d6db8640f330e33a7237fd67a4efab37f74462e8a769cc2. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/CAENV1914313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42fdcf987d2159dccd5d253468ca740d803989628dc8448970f324117274e35. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAENV1914314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4e3e6435619896407b34f1504c406c05e216eff3ae0eb414f3ce75ca2fff89. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAENV1914315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4d21ed770177e536563dc685aca593c14f667ae378c396250665e13dd75994. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CAENV1914316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931b74358bc75eeeb8a33bc1b86ad027a291ca545ff3ed87a7b5ac0d8bbdb481. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAENV1914317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a1dd78f4867e91d826a7e4027b5016f672ac2e117fe540ea1688d522d369c3. 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/CAENV1914318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfdfcc89a3cb1a2aecd22eb840bf70c56e86e9f5f3ae2146a5e0b7607631a07. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAENV1914319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53385a78c062d0a2467dfa14555ff197d0faefd33a071f215bb4d322c9b09010. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAENV1914320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d31f8b30e5f26fb5efff94c01b95e88e33108d04cf8a6779d0a9d1e9539550c. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/CAENV1914321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23306bc6edb1f30a7c439791b6b55ff35411f679883b3b1a034c6c2d17ee5609. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAENV1932848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceff4de1db9a3fdbe9eea88caded879fcd38230255cf96d7ed9bc9c9abc856f0. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:38:18Z), 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/CAENV1932849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb549e3d88974d0fb83b1c9f9f12b7b6db0ddced41a279d3240e48c89588045e0. 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/CAENV1932851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a071191db717896d4cd69a4f731647beca71077cc835d0ca8161efbd890471. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAENV1932857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe24756071ab2c51cc3d78aaf5d9975e34501c4ad42af4a04cf907bc1c77623. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:50:52Z), 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/CAENV1932858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66214a440d396b75021bcfa875dded4a6e2073ca1f751895c9e041a1d7ce10fe. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/CAGOO1981973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a9865491e4fbe690aa9ab72c18b9406f2771e3f4b5531717a4584b1463c9cc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:22:44Z), 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/CAGOO1981977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf8ee03ddf2d9547d26491afa5f66cdc8c61e0bba0fe1b6cd3dae88eaf86a8b. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/CAGOO1981979.