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 0x1382e780f1389a8f70162104c8a4982b035d7202be5cae57b3f2421ed24ee1bb. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab2cce43-443d-4e7b-9358-a28e01d68d17.json and https://artists.proofprofile.net/proofs/artist/ab2cce43-443d-4e7b-9358-a28e01d68d17.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 0xe3d0266516d91c5054a6c0370e2c53784b6ec75f3b57c9f2edfd672c36881555. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BCMPU2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e02641f6844891f27af62d38f11bb723accd8ca836c5c4e96eed148ae2ac6b8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:00Z), 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/BCMPU2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c0c34275b5a7fa1cf45102bcd1b0f60bc76b05e7ec206e99427fffe8fb7937. 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/BCMPU2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d0266516d91c5054a6c0370e2c53784b6ec75f3b57c9f2edfd672c36881555. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/BCMPU2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a93517c3cb5301ac920e9dc86af00b2d737c95d88753aeb36170256e5ee664b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:35:20Z), 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/BCMPU2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4669a67db5befae0689bc7e0141a0c96d06e6abdb532cb3c99a6b77e3ad11a4e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BCMPU2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0b76bf3ebaec8469be5222e8248e3758bd0ed8188f2824ee84478172602113. 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/BCMPU2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2c58a7f4a1b145e1d51d7efc7bc1fc47cb9fe61a3997134edac3d6a4b33243. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:13:24Z), 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/BCMPU2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd60ef04c7475893738ca31b83bd7bc31603db50531d752bdb6dd2196751a9ae. 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/BCMPU2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17129f798a0b8cb115e122a528d6154f33b8d4c7fcee844876fd9cd874ce08f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/BCMPU2400012.