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 0xa21941e3cc816d8ff1eb63999e2f856c734444d9dd6074208af42fe43b469ad5. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcd07de6-f46f-49c2-a468-e6a5a318c3f6.json and https://artists.proofprofile.net/proofs/artist/dcd07de6-f46f-49c2-a468-e6a5a318c3f6.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 0x33f67c1e6a0e0f25901e9540bf6e408c45a46876c3bb1b685e37560fd90e45ec. 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/USHM82339332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b9361f1152a3b0eb9ca628cf476440011a06b0823c5afb6f212d4dda32eb78. 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/USHM82339333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d153505b5291a0511c3c9139fb92fba72b85cf56ae62d70bec8d3d5c4c2f62. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:27:43Z), 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/USHM82339334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6bfd9cdda021cb429d15374b95ff2ebddee5efce4446da945f046f4d827dc9. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USMH92340386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d19299a57396c370a6df8729d58942523019b676939de6973923cc0d776042. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USMH92376884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56c69811cf7dfea7705eb108ac4f993e57ec5d6f21a89fe0b51c938306926aa. 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/USMH92376885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3c3c5a53a87cb5691919308ac25ff2c6003a6e575a5d14392113b78ed8d37b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USMH92376886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77b767bfd38753b29edd3f86263ece4069fe2c0c53ccada027332ff543061c1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USCGH2451591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0afe27c0cf74e88719996e102ab7a702b339359f51ef50a5ddce1a9c8ca0ab. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:32:32Z), 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/USDY42425262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30af95772b89ade924cd4cdca904dcf169f6ccfe38981c7c06b7ee407f05de73. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USDY42456965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eca1e940765038bfe940a9509591027e2467117e46b9c430dc9b02b55876c09. 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/USX9P2403514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb4f5cdb5b1216ffd93ab4ec14e65c268a391bfaf06d4d7f2625aa4ae5bc941. 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/USCGH2542545.