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 0xc5b8587fae5f6f9cee54fa224681ebaa3226a910706bae1c76624f50f032526f. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db09abc3-85d3-4471-8806-cda4e8e9509e.json and https://artists.proofprofile.net/proofs/artist/db09abc3-85d3-4471-8806-cda4e8e9509e.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 0xe29684f326c120c9a728f79009756dd7272c634380eafdbff3b15bf1c37942e8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES7181300742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3bd8bd149593750db63f6a509ec635ff18de6bba44c659aa8b2472f39fbf3d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES7181300744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97c44b34a66d4b09ef434c5abc161ffdaa8fec777f21192837154fc1df33180. 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/ESUM72301164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8556211b9f3e99728fd68b989ef398abe39c30fabbb18d1df6ad4b061a5c05d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MXUM72300426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429ee9b120e66644fe39bb6cb87f2371cf2ad4147689a4ccd2f5f46b90538d36. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CLWW21500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32129888917361a1fc9c8d7d35aa5fd4ecf780e9eae4df71e006ae705fa4862. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES7181300759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca5268ecba6d20c6160b3983ae492490bc9bdc12a061aa26745f9b34abd9c64. 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/ES7181300812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03f23bfe8078ff2c5b722b7c62593fb157a8d12c05d5f60de1fc2c7702b2aa7. 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/ESUM72301165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872547c350015820cb2ce4cc1cb0ed45e5fae00769f251e6626b4051f5ad3a63. 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/ESUM72300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97c44b34a66d4b09ef434c5abc161ffdaa8fec777f21192837154fc1df33180. 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/ESUM72301164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03f23bfe8078ff2c5b722b7c62593fb157a8d12c05d5f60de1fc2c7702b2aa7. 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/ESUM72301165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872547c350015820cb2ce4cc1cb0ed45e5fae00769f251e6626b4051f5ad3a63. 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/ESUM72300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc452899048fdff171fd8e6b8bde6adc0dd4e7072390ae2f177b61c2ed61984. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USAB02202102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0b4d35e3ffb1dc6a6c0aafe0dd79447a37c9222f8f179c06c921a72c4e2498. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USAB01800493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3bd8bd149593750db63f6a509ec635ff18de6bba44c659aa8b2472f39fbf3d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7181300744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45b8aff2ec4f82ecf4992424eb0fb35e3e6626d6c379f8ee8b1e7dea4dbe541. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MXUM70804773.