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 0x7a481dc3fa152dc91d8bff9f5c6ccd4e4c5f8bb74510dd999f2ce24240f0f595. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8a16801-75a1-4f9b-a7b3-fe617c0c85d9.json and https://artists.proofprofile.net/proofs/artist/b8a16801-75a1-4f9b-a7b3-fe617c0c85d9.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 0xfd0c23fd66adb52f4a218bc63cb0d0d6e51cf1a337c29f8214a3060766bf0ff3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPV500702267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dad6db758239a51c04ca3db714a8d049c6620db460a4626af6e69724c784201. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPV500702268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d3f5684961c97287cbea2064a25968cba25e78223322c27ef004ace3a0f646. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPV500702269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca963a1f09d50c807de33a56787a92c2786532a5ec68407799eaab45d72081bf. 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/JPV500702272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f113950be10360af1f23f14fb7f199c3f8e33517a9995829ee7bdf2c57a97f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/JPV500702273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f638c01bea9bfe5711cf9a84a6c2c3404d3e7ea2e8e4e456d2049d9ba99a46. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPV500702274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24567d9893dee72f40568786ed4f8de5585997e197bcfab5d470596ef0b96b9. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:57:51Z), 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/JPV500702276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30329abd88fb34a484e904149fed9c70f736562fcab174d4fc1f341c45fcec0. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/JPV500702278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c8f4939413d429a7013994bfd9e4ef945ef473234368fa79cf46de1a35197c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPTF00406313.