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 0xf4785c60718a3de9764094c9f016fb7224399f24f36ed4f2091ea126bd1227bc. 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/b636dd79-5cd1-428f-9fb9-5e203c30f1b4.json and https://artists.proofprofile.net/proofs/artist/b636dd79-5cd1-428f-9fb9-5e203c30f1b4.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 0x75843f8cdd155578403646c251d621a58a6ac27a7a591142e2565f2d1672eb4a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QM4TW1808333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2a944c780a7f55f1cfd1ed3ef1a7f9c417b2192f212ebb47b42cf4f4e6e593. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:18Z), 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/QM4TW1808370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222ec09e56df2aae8bfb937339e14c8ef4b747a6909e3a38a3c81f6ec1c72f2e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM4TW1808433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8624b090be8c4b865605f04dac7d8aa110f192ef96739b225b5bb8b335d562c3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIT2495519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb503f491b03b95678820b4f6ac54fa6dad774a57ade1461c5cffd29f16879983. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIY2443941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8624b090be8c4b865605f04dac7d8aa110f192ef96739b225b5bb8b335d562c3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:07:16Z), 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/TCAIT2495519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d89ea9703e090b60e79efa582f209d8745a0c554b5b7adb77d22c711c7c9f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAJB2447011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44600f8177bb291430cbc07ca7d7e4389b8194017c8315df19d5c9b1d61af7e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJB2479150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb503f491b03b95678820b4f6ac54fa6dad774a57ade1461c5cffd29f16879983. 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/TCAIY2443941.