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 0x7097996919413d74970f039cd77adc53cc4bb3b8e2df2d91d10972805d7c2b14. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3ebd9e3-6105-4ea8-b42e-f947c1e9a46e.json and https://artists.proofprofile.net/proofs/artist/c3ebd9e3-6105-4ea8-b42e-f947c1e9a46e.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 0xc28a17613fdf41c261bddbbe1ae442d2d903e0823fd46e69e6217a91b375c820. 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/DERD72300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb070904bfe73579cd9d45ed2e2b05a2e3d6fc3e6b2bc3f262d9d60948a1d50ad. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DERD72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9eb6d17bff38b33bf8a3292d68fde431f82d1a746cbd08612391e35849c99b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DERD72300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172dde876ec49e3f5405c6a15485c64e37ddb132c61498eacbd47ffe2c6106ff. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DERD72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b2887c87643c5c48bcf78f2c0521254c6a1f645b8f3fc39797aee8dc33cbe9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DERD72300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd405701235c962b6c7f97ff0c1946ddfd6aa3470c4f4633f89d7afa5b440a25c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DERD72300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08754e610d34cc375e5537032d089c5087edbf91eaec03c16dcef6ebd7808144. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEG101705002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a1d9091ae99b98ed03ce935e210ccfb207efae19755177545cd7abc88d7c7b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEG101705004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858f4bc3796b09fa0cb9636d2e239be80b18c55e391335645b87dbfefc12bbc4. 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/DEG101705005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06e21d6e440074eeb6a61ae18dfe370a469597f8f8a5814c1b3b15019d52901. 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/DEG101705008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b84fab55849db0cd5f6d7f20d1db5ec02c262a170b8ce804a53d3b1025e01a5. 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/DEG101705012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb47e48b35b9730d7cd097bc962106b219cb8aebd5bd1587fe580cfc11fb68. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEG101705003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee63aeaedbe52c588c4b67643003210494d12bcd6ef9632e11788165cac88a52. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEG101705007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5f6dfedf67cb58386ab82d4321cd2af4756bf15f6d0032a98e8605b3016881. 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/QZDA82183333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6440e6c531e4c79607525bdcefeeae0bdbd6280caae62d8e7810ae48774d2885. 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/DERD72300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea375a42a9a8c088b8a8d8df2845f3ceeaaf99a75e2e5db55f0dfd3f9393d34. 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/DERD72300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4ce4e98a1023a21c9ddc7bc11316221c9bb0343ff76579d5e023e907c72dd0. 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/DERD72300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd40b7be80e80371fdcb185fb816ee47fe4fde27a003b9e441db0a7162dcdbc. 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/DERD72300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03163f1b0e70eb64dcc6c99f7456dc9566c5963073f49c457e4f4435b21e4388. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DERD72300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58bbcbec68e6d7fb2f3189c4106d6c8f427e0ef8fd8869bf2fdd3693444594f. 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/DERD72300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647a7db70a6127d5db4338808355e46d4d9c922500bcb7b832ce47d1d1bf2349. 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/DEZC62119795.