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 0x886266b6adae2e605c049bb015a613d2f33ddae8817f60185076e21ec482ed21. 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/67eb9386-a11b-4662-99a4-53b979c3142e.json and https://artists.proofprofile.net/proofs/artist/67eb9386-a11b-4662-99a4-53b979c3142e.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 0x5078cc6f949f2086a35dac3a65910cd86f6adcae8cc6dfaa0fa4c1a489b88891. 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/TCAFD2098729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa47a6a93420efb301e78e52d93880fb0c4943df613923049bf0130c7ea2c223. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCAFT2190408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79612143e4b368b35b80dfd3e298314247757c2c4c83fbe2745e84d7a222765. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:17Z), 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/TCAFT2190400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c17d73209517db48bdc157ce082da31bab5118c63988e9bf118a999f647e6d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAGA2208169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4867594f7588a10bf64d821bcba14e1c862c9c5242ad473034f07e3e1883a90. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGN2227567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad83f0a1607a7491c6f6be1cae5a2c171a102d76969388cc2a99088b86f83c68. 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/TCAGN2227517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc621c0b3b7bcf2070690c80e23d554ab4d0c75e7695455c013bb33a5d19bdae8. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:21:58Z), 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/ITUR32390029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378806b5cf7319a756e2ae587cbea87a21c68aea8870e769b1c7fd84b7376c04. 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/TCAHI2326971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1e9325e8592570d0afa5e8d6d4cf2cfb98313f877da2da2c963e0320e2aaad. 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/QZPLR2152611.