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 0xc9f7ced7b749cced37fb7d449545b041277893375a254050a44ae50cbeb0d44c. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a3ba1d6-9b43-40ac-818f-c646def9bba8.json and https://artists.proofprofile.net/proofs/artist/1a3ba1d6-9b43-40ac-818f-c646def9bba8.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 0xbf769b0ec6e6049f6522b2ab6f0993f7a766e97dfd303da7399115f7cff3b31f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DECE72503355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9493f5204e68dbe278d2c3f5b5eed959538719e4ad9e5567945af49db61036. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DECE72503397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db8001fb785a191964bc5448ba27a33da2f30a5e366ff5306acbe33c9163da9. 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/DECE72503398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314b85a97f9687c83909a62f2313203715cd774b660f05494b68af2e0ce88328. 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/DECE72503513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fe76902e38e5731ba007011b60eea5d2e3946698845e1df426552e7e3f2e00. 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/DECE72503515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d4e81b66b039e763545d8805d0311dd9aff904525edff8cf70f58625255836. 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/DECE72503514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbc896d0b2df781eb57ed515b5b61cffac36fdfab1bdbb930b0476717bb9b38. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:09:38Z), 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/DECE72503534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f24b1d2b1aaeb406f44ca576b3a51d211cd967bacf4a5d4b3a923f5cd369175. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DECE72503690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f80f3ea66998aff2db537903b3ed4e4e96c129c981ee24d28147c44cca4598d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:29:48Z), 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/DECE72503692.