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 0xcad6951807646a74ba507ac1ef98d71b55ca33cb3f8d3d9c4cde191a378d8a1e. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/114f71ff-5643-4e2a-876e-e21889a858fe.json and https://artists.proofprofile.net/proofs/artist/114f71ff-5643-4e2a-876e-e21889a858fe.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 0x7baa52d630a23cc3d2244ded535c3e2851967a9d78b6f8fb83b4f51461521fc5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJL2583436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e158b050bb36ba8eb7d33d0fa1b2382873d0ad8fff316d92a1e0c08ae847cb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJL2583441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbceeab4d2ebe0e469fd61ee2e2bea78e7f4c50c1c65e0f5ce6c448ad00f909. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAJL2583444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfec7998f2ddaaaf5e461fba9c3af6a7c3bd1f8e9687adb45a6d51df68cd48ec. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJR2541260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc151027f92ebd7df16a24e31ce3681a035c02babd705e084a74f8ac057e70fe9. 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/TCAJS2541264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c796f48827bf05f595f4d1d5afcecffe08c770c24e0b2bf1eafb087c2732a0c. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:22:13Z), 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/TCAJR2541271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b23c7231840f964aa93af120a83cfd0eadb773a53325464a520f19eceee4ac. 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/TCAJR2541276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb699255533f6740f8172a621220e74b4f4aa23dd1b92a7066e3e0ef083cb4b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJR2541280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a34d2b7c236a43b9cc68445a3545a57f50e4414d03447c9abfe498d6ed692c9. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:26:17Z), 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/TCAJR2541283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb55232d3cbe2ada114e3a6d2f9b7b5f22c803fd1f3803e463905608002c789. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAJR2541287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc37d1d412af6bb69defb3cdf7758d2d0298c5cea24a126c896b9f84c686fed. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJR2541347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817ab814129e0510c8b4c3cf80a0237293455139bdc0ad91089da0262c842416. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:32Z), 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/TCAJS2541351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf647c1b387911c1f6c0059281cd6b83d0df05558b235e17cc2f9763546a149b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJR2541359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d246cb92dd32653c2aa9c550acdfaf38af0e97fdf524a1095077c844bb56d09. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJR2541362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee404c192bc3983334d58b5fcf6de0c80279e7d68a106ea57659eab631dadf7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJR2541368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2a966ca513edb8d24a52eb57740ef95515516c648256dd98374149cfc9263b. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAJS2541373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281952f16c160d113dd15ac036a62f3dd89a4f74d34341880c4d7c5b79a5486d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJR2541378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc1743a5fd16840019034331f6781831f62c96d701fcb5ce215bc7d2e2151a3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJR2541386.