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 0x7ce37bcfb592df8b3862064e539cb58f97561605b022db3ebccfb6f8fa2119be. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3123568-9bf5-410f-b44e-32a4e075776a.json and https://artists.proofprofile.net/proofs/artist/a3123568-9bf5-410f-b44e-32a4e075776a.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 0xd7385463f7fe27b5a9923a125ee0e767444e58058169c8559a8446e5c933d2ca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEHK92104731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8043d261d8d0f78e9e54a1cac4934dcf9c71cb69e8d03d35f21e9ab5959f44e1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DGA0P2447188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7b3af0f7cd14747e9f9a59d07a1e6e817f9bfb6fcffe683e494c603a4c70c1. 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/FRX762544417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d16702d6d0f1dbfef5a917ea013f42b4a4a27c8de7a659aa8560c65f86d9afb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUM72206993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bae9c2d6e7c0d8701fabc24235f3579308c98be1eeab38dd39d646f243975a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUM72205028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165bb20c8fb00ad7049d7ee969edbf55a2ad9b6c236e5f66340fe7b22ca46c91. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0H2326240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282efee3eb04cc055374bace8f52dedecb26c9222acf95a347aa878e8b4e604c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEY202300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc08a3baa40d3b27a62a57e85848f6e6f2f7d2362f4de06c03e067a49ff8b068. 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/DEHK92104749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfb9179d80b263a3c631f83c1d69a1188d455a731644d5d8e675c92fcd2f65a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEHK92107719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69348b2d12304c202f5e2d5685ab020f33ef497d1b2bca5782cb638ed2d22a1. 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/DEUM72300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d16702d6d0f1dbfef5a917ea013f42b4a4a27c8de7a659aa8560c65f86d9afb. 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/DEUM72206993.