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 0xd5bb5beda8e93f0a4077898fb51e531022a238278466cb35b96751ed3a41a6d6. 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/45322042-5b3e-4699-be8c-82e88c6234b1.json and https://artists.proofprofile.net/proofs/artist/45322042-5b3e-4699-be8c-82e88c6234b1.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 0x3ea2f8570d68035478e7c0e45d31853cca5563ff4a03addef842b388dc377d7d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:18Z), 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/CH7811112850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5026a7f796c49080ea0951e98b0a32f7692baaf84d08fd31c2196c8fe37d7480. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CH7811113936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5536adca1b81e6e1ca7ad4a60c507f34ffeb9d2b002d597ca9eff6256142c96a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:39Z), 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/CH7811114020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc761bdfe5d2e0ad0e07221549859f0cf32a1c04605c0df5af90dad784c66892. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CH7811114022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794d8f0067d2c7fa963619e4fb6c133dc54c15d9c84a67068b6ac54fd8a7f043. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CH7811112851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ec8dac875526c68bdf205f4b06f8e27379a9d259db1781096bd34ddb168796. 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/CH7811112996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b43d629efb31ab33535e9c7d2959956fd53566859b6368a3b3c6be6c1c217d. 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/CH7811113251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32044b172682557d973877da3e2718899b57e619e5238b3e2dd1bff9f802e82a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:09:07Z), 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/CH7812531460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8505cf15b63ec2bc384e6cbc8764d238caf53867776045427d4a798192a897f0. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/CH7812545751.