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 0xa9d23d824dfc4aa2ad2638501b14fb21875c64a56ebf8a7b788bbff3e5c1e8ab. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa94c8fd-3c9a-4212-8d38-7720b8c17ec6.json and https://artists.proofprofile.net/proofs/artist/aa94c8fd-3c9a-4212-8d38-7720b8c17ec6.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 0x1e25f5c4248510f972ee611a58734a8f02ff515effcb86ea3495b21b8c25ef72. 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/US23A1557817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e25f5c4248510f972ee611a58734a8f02ff515effcb86ea3495b21b8c25ef72. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US23A1557817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66eded9c32907c2ecbafd5550df30f54738e0e844423dce2100137cfedb4cf3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNB82419527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ca117d65ae6d3c7782f690c3153cc1f956414597cdea712c05bfafd17bea40. 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/QZNMV2485632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6dfdaea117eb25e40a637c8e14b19ba929b2d4604d25a77a3476e628e02061. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:29:10Z), 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/QZLL92528267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe0c063d981b3a46bac4a76e608d2a63d9c1840e5d5adb39ef3924e13014d07. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZLL92528269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3598e90c1520b9dafdcf028e4d5df3335194a6186c0596e7a67a01212fe9d723. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZLL92552732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a27391370d45c2b1a27d2c0d7289e32204d8fca23a4d61a349142e6e42dad2. 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/QZMEV2544313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e559bdece734648c2f2b60981880f546b11d8bbc2e37dee559411a31b95708. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6XY2299884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e559bdece734648c2f2b60981880f546b11d8bbc2e37dee559411a31b95708. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6XY2299884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda91f4f00341dd1a1ac907cb1da9e5d35f2e175ce02c6d0691e8798a011a0bc8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFF2334500.