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 0x0597d2d7996460f8f40cf57d6995f2d5e51e79a1c4fc6e33ce9b323b36a2f00c. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b4f41b8-04b5-4d36-b9dd-5a5042105f01.json and https://artists.proofprofile.net/proofs/artist/9b4f41b8-04b5-4d36-b9dd-5a5042105f01.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 0xc29bb0a9cbfbca3d4f9a2a81a42449944b2a38e2171a8efca840e3740a54b8ee. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:21Z), 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/QZZ782448454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe315e7ca5b90e608b03efb636be0da087e088baf709d0cc98fae0a0635925e69. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:27:07Z), 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/QZZ782413658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034edd02d2c088d1e99ac52eb2844b2e233d6539f5511e81841fccc730bf823d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZZ7K2421472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778b588a4592e8c092a51525f1a42eb5d844667c900d57f850e5a49453047b96. 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/QZZ7K2421473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0030f4c927f4572ba2f55e1d351da0beaec8290f4319ae3f529982d8c79b1b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:21:09Z), 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/QZZ7K2421474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550642b7c1b2f8eb7f4a39196a3040b28535db6c79503384070f7de0593bf67c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZZ7K2421475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3e9d69ff9d7f0e464bf02dcce0a8ac97a3383e25bddaf19c2f7891aa893750. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:51:55Z), 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/QZZ7K2421476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c5e987addc90e84ba6c4049d6b415c40f2a2a4a1f8556e8dacb5c98810910a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ7K2421477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05b980bc95f19450ad925246d4af17aa337e04c1f21db8deddedfbb923afeea. 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/QZZ7K2421478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f5fa16d1b14b48c50fd97e6cd7b7f0a91b97784a6a55d6de0666d3ce853256. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7K2421479.