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 0x8dd22002113fe8bcf4afed7151a655e3bc578ff3851e97c7b2597733b08caba9. 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/b6e606fb-51ce-45fd-b99c-0ba8eabe74c7.json and https://artists.proofprofile.net/proofs/artist/b6e606fb-51ce-45fd-b99c-0ba8eabe74c7.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 0x7a5d1eb34adb54ebc0e89dc3bf33e1eefe42214853465264ea104ed7b878f92c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BGZ652418203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd624459f90c4a9b144b6ecd4e4b14a074f2d31bfbbafcb6b4381e0d431307f48. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BGZ652418205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf7c6351b974dc5cbf2995d199673e41a4e7b6d8e2f67301873b64503d0e70f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/BGZ652518101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abfcba4bf453ba494486e9c2bbbd01fc294622bc43b446fb3dfbb7f3c877e0b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:17Z), 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/BGZ652518102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8828560ba4093a674aa2255bd65e341f0eab21cc5daa5527decaf67a1e87a36b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BGZ652518104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9c5b2b3f43b2219dabce6c88626a75d580195c8c7e3abe06a7b2d3cd105993. 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/BGZ652518109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa248fa793739c5decdb1fc6ed0ffe0bd91f262a63e347746d628f9b430ffe50d. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:31:05Z), 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/BGZ652518112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2207d0e00ba28789a84fdc225f4b4ec2320b9503a66fd9782471c2d5c88ae47. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/BGZ652518114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce144f70f9a9ade2cf2c218ac74e7fd2e46f39ccb0dab2a763e6cd25f9952240. 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/BGZ652518115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e203200b905e201b0b2cba45896be146d66a0ca40fb1537ee06948f80ff5e2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:39:56Z), 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/BGZ652518106.