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 0x70d09fc8f5357f17880b932acec44d380517833401c9c7cf2cff8340ba7fa8fa. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59d30fc7-f9de-4ea7-a147-465c03c8fec4.json and https://artists.proofprofile.net/proofs/artist/59d30fc7-f9de-4ea7-a147-465c03c8fec4.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 0x8542b22bba079a46d0e8c129e23a7a37b972637d570389d9e49313fd75709685. 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/TCAFK2187187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475d2829ed877ed083bc9464d20e7625b157f84668c69435336246a41ea4947c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAFP2188733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49986f7355f3044fd147c37c27352958d35221b8ea1f7265bfc4229bd43fdea. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAFP2188748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee6c15bccb9b70f9a12fa72bf3d2ebdc8d7771ca38bf012f78bdc61ade43081. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAFP2188765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a20c2147d1c4960702281c27ae0130304053236d1b08cbb9e7c2f025fb9cf24. 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/TCAFP2188806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf063dce020d9f5627125c7a51ff9bf19708644444e3fa961c6450e9c04601ae. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAGN2269763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dc5a2202cf7e173cec0a68a7417459473f600f2d1eba7292b5dcea21466b9f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:55:36Z), 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/TCAGN2269773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0dbba9a47e52df1b6c77adf6ac09bf945901bc6e0f1a6cf080f80d148c5d73. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAHE2304222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697f9ef9dd8b98e6e2c7be66d04da112861b49fd5dfd444f9f77019159351758. 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/TCAHR2342090.