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 0xdd048996fced855fe4b92f12bb37fb53ac3ba4a8f8a85f6890f753f5979878f6. 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/9d1e8186-86ae-4bb4-b749-05ed1cbf10c4.json and https://artists.proofprofile.net/proofs/artist/9d1e8186-86ae-4bb4-b749-05ed1cbf10c4.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 0xafb64767106ae767739259d977b4fa9ad69ff140a2d5f1816eecfa954cca3d70. 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/FRPGQ1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a96f014a563e8730559a6d6bb324d3d535b4b8871201d826057d642c13f7a50. 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/FRPGQ1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1910c927df4d0ead129cbc5e7fe2a39a32a91d3d97602b0b26e8c6c28557f4. 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/FRPGQ1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca42d7dfb89e590e78dc4240da9921fd97d9f608ce5f2655a9b97fcc47934e1b. 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/FRPGQ1900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4052216750c97f5ea758861b9a255e106e445adf58fa9c63c5a0f89889ad6763. 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/FRPGQ1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7876a588c0e15adf8941095dd8ac99fb0b709fb1dc1cc6a6186deb9114aba4f. 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/FRPGQ1900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aaa064ab5f7a13b0aeb7774d8af5c033e54b140f0872949e899c870c68fc39. 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/FRPGQ1900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910ec1cbf20de56973457e59a4e1a8c0aaea704a41e59fbf99f4a4af640bd7e8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRPGQ1900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c41ad7158ee822e95c5c49ca37182fef745c50bde848bdf8018a985ef1de33. 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/FRPGQ2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a29720e0339bd55d474580498a4f12e749bc6ee55de10d1b811d17d9bef2572. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FRPGQ2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1817a383780992825577d95ae60832cc20c763af6f9d488efa10607d2b7360b3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FRPGQ2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9d4ebef9b89bd225762d8ebe583115359ec6968db9943e3a8a87988697cbcc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRPGQ2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35163dca10badc334ac908a3b99539e9782920104aa2284edb4af48f07ce5d59. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FRPGQ2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3085d592005e6de2adc7d2e481a033a504c109db3458fab30e28cf8742930e8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FRPGQ2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc54cfbc91db45cb46f729e683a2fff60fe22695af5c5170bf7c81bb2441b84. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FRPGQ2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c07db5b990517eeb9d39f763f3cbaa8a2967789ed99ae687661d06b1f62fce8. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FRPGQ2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dad8efe8c9cbf88fed81ab5db76d132cee1a0355132eaddf37f31f1a6e663c5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FRPGQ2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dadf9ca6eeb58482fdeb37039033b25e969dc4f06d2ec98f4dd2849dd736b0f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRPGQ2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda414ade3bd2c7ddd4244617ea86ffcc65645d4b51b4f3d5bdbce1121bb94c07. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FRPGQ2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82a8986538a22fbd8e5025e4d0849c91aaae50be20d369c6dd655ea742490ed. 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/FR9W11614478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f447d15caf10d18cb5d710e230cb465c191e5459f6242e9e62471edaf611fc. 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/FR9W11614480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec83c8d8ef2bccf9d2ff6eb9396dcd6a0c92e77a6f249af772e584c7d6d35a91. 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/FR9W11614482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05896073dcb8636016bf53f51114bd3178f80430c745b2f9c6cc8701d0d93ae4. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR9W11614483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce8f0efef9b6610909f49ce4ba31f049d79601bd22a8b3b28016d3941af54fb. 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/FR05P2300435.