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 0x4e68d67b9fc3ffa3b7f60f56e7e1a27a36d8114e91c45c8a8fe99814789f9993. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c4733c1-a54d-43c3-9e57-9315b2432e4b.json and https://artists.proofprofile.net/proofs/artist/8c4733c1-a54d-43c3-9e57-9315b2432e4b.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 0xb04b53a4de3b42cdefa1b06ecaee22b32e87a13725f77ee7695c03090ff99ab7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62346053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32012f5a05f7230144b1efee90be30b96cbda3c5362c74ec4b71f29412ac6104. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES72329443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ee076c79ef2e7ea3686b642b98ce07ddb03d351ad3cb814d908eac1c38b6ca. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWW2363473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f858ad8cd065455d580d70e6582ad0d4141e938b87ec28858531585c8dc9d05. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:59Z), 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/QZTBC2352633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32012f5a05f7230144b1efee90be30b96cbda3c5362c74ec4b71f29412ac6104. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZES72329443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28c3278e23c0785472c4c4c85028a118c16555ef21b97fd6f7c3c47bb22fdc7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:49:07Z), 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/QZZ7N2416170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c6bc2906211f28923f7ed29a606a4d6e45e1a7d8b0d770388cc643e9ca40b6. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN32555461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c163f8768afe8b20d8406f7e092a90f2332f48db80da45cd1dbeaba622158f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN32557735.