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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb9836c24b683fd12a3d4e95aa2da8ddaac955eff6b9249caf215c86ee997c1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b5cc837-5fab-4ea9-b9d9-0f0ae2e09831.json and https://artists.proofprofile.net/proofs/artist/1b5cc837-5fab-4ea9-b9d9-0f0ae2e09831.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4355debff0fb16a918a483461a389a98882534bd24f4f0cd532b0094dd5e7c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB42360832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83a294587625c2c579826c5293e825e1030db9f5dd2b75fa8fa1eb244a4d862. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZRP52336919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caaf3db77c6a6eb2754239895cf240a74c37ebcbfd2a9fdda879f4f5930e997. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWX2329626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3d7f6315971043ec7a1df2e6d011cfca0220ddcc2a70bd3c64e44a45b29626. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWQ2336812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fa537145608101ccb4bef8ad7148cd55cdd9d48b77a85ebee32349b2af0ee3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEM2358815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ae3e8c9447a329c129d171f121d0ba42af60999a8eb280c95241900fd3c123. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA72355671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7bc11122655be7b5d33f461b39207408384b78d06e4dacaa6de477714847c8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE62M2212463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25909a2d333a8b53fbbc37d0415f368a862cd6b7166f2d1c13bc6ae98469eb6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZRP42210245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2478bd69602a307cbfdb5c301b583b83411581c0d8d26f6cf53df73e5a4653. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2230474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912c531ceb39e7152b5f0ee2204226c998e5f007dad444e121fb1416005d1402. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2230475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a896666908b9c8e2a552cd271261adf5ca469215e7bd069b348000d5561e05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES52203623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15def01d7dcfea29bf12c647aa3ad589fe378fef6d441d7444873db94b98bea. 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/QZMEN2146616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3e23f39ee0a83e2ac60bd4930c6640964697cfe3299f99025d637e261d5308. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN32188398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8493775b6251d6622ecd1e8ac52b51edd9cffe1b7511b677ff56a4861cfe1f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA72197594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6368a49d96df86d88bed6593ef8f8a5e77ebd8f92a155a0081f5143fa58afa90. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA42133260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d08f1e760bfc8e94f752b058ae88698452481631d904745f4eee5a8f96d1a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ72196037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9fdfdc124bd63f5bf4f03d68f2929bd381c6ec6141d5210d9734edd3ccd950. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA72441662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a4467e462a39bf2aa0f2570ace3e05954c56babd2915c5f671256ec1e922a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFP2396170.