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 0x50a18c2886bf0fc132322252357eb3728df5406d4e4ac057cd8d57780abd758a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e6ec372-21c7-4249-ab0d-42d8b4752744.json and https://artists.proofprofile.net/proofs/artist/2e6ec372-21c7-4249-ab0d-42d8b4752744.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 0x3955dd3fa9c29044eae4f6e89e23ea1992caa31fac6be1f81eea5d031fb35086. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAII2436885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40348646adab7fe0572cf74bd547b3e25584f2ab2239bd666eb12140557c4fe4. 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/TCAIE2413818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1641db05024888f351e63462235f37a971289364ad2430522230c62e78f08276. 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/TCAHO2370268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10676915089bebcf8a227d2de644ae8c239b66dd546f89e464ed93412ffa3da. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TCAHK2359909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bceb06e428518f5ffcec874d2bcd28bdbfc6a505dc9caed545c21eb29f3a056. 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/TCAHF2341397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a29d89eb77e30d54931015e2d92558a79a7684ac1adcf5796cf24fe38f001b4. 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/TCAHC2328999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dbf16b2e28387ed613755a1d0ed75e57c8184688602b9392b160d7b70a8b76. 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/TCAGH2234972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3431635aab6411fb14a2239a8ce09ff542ee3293b0d7361bed49569743e9b1c7. 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/TCAGF2254219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3372276bb5816f2aa8fa04ac496824b0ca9f458367a18b8eb00e958e6d156d9f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH6542071370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b51f161c8bd4396253f39f707510e2cb49a1faf0bfeba5844030f088742a4c. 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/QZRP42175779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ff73bedf9f54a3298cbabf6e30ef7a72eee9586db99bb159d4d96b0717b9d. 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/TCAHH2356354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9d87f137c5df0e0b98abc895b71b10fee093b2d56face382420fbf4383702d. 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/USLZJ2393901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34065b5b66f55faebd8a37a3b429c36f7f71e3e98257470d5fac1e63815b977b. 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/QZHN42372446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31a619c8de83eaac23acbbfc04896faa4f5192951890f9081ce83a90ae88ea7. 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/TCAGG2250744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d570d14da6fbbfb6ed8ead921265e0ab8f76c2b88393d2447bfee1366909fb. 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/QZES72206223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b3e3ccbbcb9ebe4b98c633e5f21495f9ae874370e5b4200332ad06164e8ec5. 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/QZWFF2313294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e65821040cac1b34bde36cef9730efa0fe632b540d78debd995a1aa38a5ba08. 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/USLZJ2343020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781ca07de477130068f13b44fec905ae945cb50b20461c7b9ba74ca5507e7b4e. 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/QZTBA2300997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dbf16b2e28387ed613755a1d0ed75e57c8184688602b9392b160d7b70a8b76. 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/TCAGH2234972.