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 0xc8c3bc10ef6ce632048c2c78b10610811c36cfd08d756cf8f84924d3dd995af2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7f01070-43e3-43b6-a022-bb7b15d1e3b7.json and https://artists.proofprofile.net/proofs/artist/d7f01070-43e3-43b6-a022-bb7b15d1e3b7.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 0xc3298d4a35d30d1c5866f56232c73120778c35962abbc84f148b30eded46af1b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:28Z), 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/GBKQU2180984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbcc8a96f4979117bc64eba480356083d5905bc0ae14b5bfbd770fa04b277c7. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GBKQU2180986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60d2a77a19821c8e0c20f91b12d0b57fb3ebbcaa3702494e83ba482e29f7e7d. 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/GBKQU2189143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2eb5045916ffc770a30473b802679d211ebd16c3454b121d8fe83ec21ee2de. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBKQU2189145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c9de9680587ee85c226dcf9cbb2ffc77c0f2b9b79c1d45bed17bed72116fda. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBKQU2189147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883ddd162cdbf5e125d9012585eebf1c6554bbbdef12270da33da526609d3dff. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBKQU2218920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76177ce369e0088ec9c2c20723a457ab051392a72ba0b649ab108532382a5d57. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAIF2474789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec8e2b35211dec1feb8995bd1b8634f0cc0bde4eb6ed77020923d342cb2246a. 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/TCAIF2475042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0d1041cddcf619a0a17be32e02e71dd865f3d4f2eed1ff70a5eec480c2288c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAII2463059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3170245c950e1cf30ad35f39b9433927793b85169a1e20a95f697b6213e5ce. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIK2472894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1615bf1fe676db0f5f79c81ad3664853623fbb328cf8285b5c6325281b4e0cc0. 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/TCAIP2402654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cc314d8d8b78c76d4b9f08ab796bcf6fb0dce095da7f06c84b98095865d558. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIP2402661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48812bae04542439428989aea53d18b9bffc847aec2352e83b5c1ab85887f688. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIO2402662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebeb1da584a298f09efd0bd668e1753ed30705d2c377e9dd5669997e48e0c76. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIO2479369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056a3527057c7f74ecee748a5713e352b6a8479d1b6c00198f9ec539098f7d76. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TCAIQ2474681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dde4fea21e2e28b81a86c53df4fe57f4dafbee1d07f46991ee26b8722bc76db. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIS2489100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb058c1c8da90e3b79f9546dafc69858dce01b07bc07444f4971f26d60ed8c69. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/TCAIS2414358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3540c9289b1743eab6f85029ce2c668840c1be764290682e97b8841957bb5d0b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIU2456308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8775a69b8752445f9adcb360d9d701cd31bb33d696a2839c6d0b8ca5350fbf65. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIW2405614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2bb5ab8a8cb50981a41a4cfdf03a45868fda87bca4bf3b3496788199bbd412. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCAIY2403941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4aa277aac77823f71667a5ec4bdd74f290183f4b649ea7b697f9d27d750264. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAIY2421077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33abf8a783ac54b5dd5d6a227f88b2dcef48966e1af9f08af74e33885010cf7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAIY2486980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd587c2456aafb482a0e45dfe62d1e940db4d02579d28576ebc4b3b8ffa4e742b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAJB2437133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea82766e9bff7739beee994c4603245350de9019731479c37ad605d5e091b1b3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:24:37Z), 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/TCAJC2450427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b831d4c9cf3410692aa8217c9bb165e9d0b701fd1ef32a8fc4ed3b0372e59c1. 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/TCAJE2530275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c4ed65c053a1001f7a875b35aa2f55391448b38a2450ff96056e6a600045f6. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TCAJK2553982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a5467c1bf4298f04985eddf8a6b46d5a9a23af75d3f83ac039ec82b3ed301. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJY2511505.