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 0x7387d814c07f5bce151faff4857899986bdd5ec65d6a82d9c7a2e677e5e820ec. 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/c2fe3e79-045a-4209-bdbd-1bbda4fdb917.json and https://artists.proofprofile.net/proofs/artist/c2fe3e79-045a-4209-bdbd-1bbda4fdb917.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 0xbdc3f790ff9bac4f7f5a6cad136b6fd598de5ec1201f9c179b668aef1da4a5c3. 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/FRPGV2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339b972001e98ab3335b1faa997df4f05e19e65355a6aa0492b8a7849c97cc25. 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/NLF712100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3659056870d4ddb38d33201e8191572b01af92ca3ee106f16229eace169b1c. 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/FRPGV2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e5af3ed4b3bcfb2d2ebf0696400cecbf9b8bdd74b657c9c1cf951dc39ec44b. 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/FRPGV2000023.
Flashback to 79 (with Ricky Ducati) - Interlude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecd9fc9e8a4aabff1276b36a93282c84d4ba8c9f63d0aea03e0e26cebe8d309. 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/FRPGV2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b0b162365ddd6ea544c6eb1347d7a80dd72ce260327c9759e9085a6229b125. 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/FRPGV2000025.
Electronic Music Anthology: the French Touch Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc3f790ff9bac4f7f5a6cad136b6fd598de5ec1201f9c179b668aef1da4a5c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRPGV2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf172cb9a05b191b14575e41277f67bde731e1d80438c6dcc411cddfb52c00a53. 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/FRPGV2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059d13f2a1bd6489ce625b71c41de9819626ee7a3ae2c0c25ed9e23dc4039005. 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/FRPGV2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b23651073ca25e60983937ef0e3a42fa01144f5fe460eb009bd9881efb41b9b. 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/FRPGV2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70240ebf5aa69c0a90a39fb0d2c022dab82f64d605e6e687e54f50cc63b9de85. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRPGV2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1425af873f86fd6528555c8847c0600c778fc5005be45d2a900724137671580. 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/FRPGV2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c45d5f1b63b734fcd0aed8225ee130b56bafc0aa68bf3558ad961964716240. 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/FRPGV2000012.