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 0xf1cbe7a52c50022f1aacba12620a76f3930e602ff12574c857f68de957782727. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/514bc93b-cc72-4fbe-a7f5-131a622b98e0.json and https://artists.proofprofile.net/proofs/artist/514bc93b-cc72-4fbe-a7f5-131a622b98e0.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 0x384b11a389770787c22a4ae799593503dc067fe61dac5d01a8916a2fd9111f1e. 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/CH6542529242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da783876c359b88d0e0175cb7d0ab47e2182b5fe08f98f80629018df7437976. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CH6542529241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda80e6456f7db52ae61fe8d01946ff07250112b6a1f2cc14622b66c71a506f1e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542529240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b74682ddd1a6adc4dae3f62cad6cbd708cebb9a38417b0c020ef27a73397ea4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6542529243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9401e1067d7f497ff4245e4c7c30677f9c4d2089d7eff3d343183c392b5f5f1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CH6542529244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d858d362bf24062751debeab5012189b0d5e72a91e52d6316b2424b3f03ab9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6542529246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a72dd8097f1b0d63f8dbf4a6080fbae67bf928d62edc0e654850c743c229c00. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:50:06Z), 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/CH6542529248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5647a8e6d4856bc25196fdff0c777ec61d3ac93cf9db758913f49a710d48301d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CH6542529247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c6481c74ffed727f3de69c4b629acd470cb737791106435bef3539e32fed31. 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/CH6542529245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a0d11b7671385f808a3b2e0f7d2bace46fb014bb92ed51a0a5f335a0c04770. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH6542529261.