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 0x264e6879ba7956056d9108d17072dc5e93a7411b97c02637fa30b5f90419b2b8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5692c79c-c337-4628-bdb4-4755550ca94a.json and https://artists.proofprofile.net/proofs/artist/5692c79c-c337-4628-bdb4-4755550ca94a.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 0xfb393617cdecbb5f9fb50ec5ba9e730cfc8c3e4a612c063bbd40ce5687aaf754. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/PEBQ91922975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc2db9ab8c9a94e1f99f04f38742a5b7c3eac6c0227eb05121a8cb4f2422caa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PEBQ91922905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc326964498abcc79b47490e4328bc962b20b93e44db51b3d2a349b0bf95d4f88. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PEBQ91922910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa832e54b18374ae52ea37d1b6172e44ded0233af055a83298ce3734d8881f645. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/PEBQ91922921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bcdad9c4fda8808ae6abe98c74cdf4ada5a3394fa15fb8a83a41c8c62057fb. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:35:49Z), 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/PEBQ91922923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b5c8c68f716ef6fbd504b779b1ce34e6424dc8d48037d165fd0a9eefb215cd. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/PEBQ91922925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b6d40ec1e419434c324349fb7c7c6fcbbcd21c7829ae68378ccd566b907017. 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/PEBQ91922927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551c80e4b3a100284c0d0ae1ed6f68030aa33b0316f27fe12c5969f54ab5f9eb. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/PEBQ91922930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387462194ccfc740efa38feef0d56f17a5d835597f81d3d622e9343bf1dbd5d2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:00:53Z), 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/PEBQ91922931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015f9b869ca3ac17d67c302912218f2b189524e8df6c76692589403e0d88260b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:52Z), 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/PEBQ91922933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1056d4ddbf802a0b911a5b0996b41ea4125a8a276c5cbb65d82cb3ab6dd76f5. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:44:16Z), 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/PEBQ91922936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2886b98a204fed38538ef6f3dd088b5f5542a91c6623365b76d298b3e5f529. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:41:20Z), 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/PEBQ91922938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c29c5bdd7ec7b1d61c34de3b754607f9ffda421b4b395cfad1255400fc5d9a1. 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/PEBQ91922941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67125fa18890ae6c8d0592a49ea3621a9e77bb51baaf6aca43e16ea4a9823090. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PEBQ91922942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f38b04e8b7714525eb827610ca4c9e04581202828e0a09e860129efb465b26. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:38:58Z), 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/PEBQ91922944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b026db73b59e9ab38cb566eecc9db8174f258064cd14c56d779b6e18ae681bc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PEBQ91922952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaa3696d153e7f6836c0d9e6180a6d042f7b0916f43a6096d6ac5cc1740f7b2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:01Z), 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/PEBQ91922963.