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 0x91915a95e802794c9ecc10d21cc40423db49308759f112b78d604df2e1d10a7c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41a28f43-700a-4aff-ab90-d228271cec18.json and https://artists.proofprofile.net/proofs/artist/41a28f43-700a-4aff-ab90-d228271cec18.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 0x84465c75a7cdc2ac1f8209dd040a593022525f4ba9095064470ef0d661fbc81c. 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/TCAFN2174658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139936f69a75cb10b556266581fbb0a4408f394da7c0294d2faa3d08307bfd3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFN2149368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d559349df4425afbaf173858848626ff7fe32389b2a7d040f4d975dc7344e8. 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/TCAFW2147951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a98f2f343798d43cedbf58426e9b6f3097ea20481329aded316225431ede13. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAGD2221408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13f26f2aa59796e738f77f8e1a66bb2204e555dc5a3a713fd0bbab6d2354544. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:09:33Z), 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/TCAGE2282314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c4877b43fbd246a6ca1fa5f8239dae2539b1bad2c6924129a142643c770753. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:38:25Z), 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/TCAGK2222977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e6a041678e37f01d4e5e931676e35ddb3ff0392a12b32fc579983711ec22c7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAHO2375740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c45252ed379770a973d3b878e47fa725cf04b246e1ccf43daf863e967839291. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJO2559950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9845853ad1d82dde31461d875b5f94d0af0bd0c581efc9c4ed14f00fba81ee5. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAJP2549315.